diff --git a/cmd/cmd.go b/cmd/cmd.go
index 5a55ac318cac2..d05eb8b1a2c3f 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -38,7 +38,7 @@ func initDB() error {
 
 func initDBDisableConsole(disableConsole bool) error {
 	setting.NewContext()
-	models.LoadConfigs()
+	setting.InitDBConfig()
 
 	setting.NewXORMLogService(disableConsole)
 	if err := models.SetEngine(); err != nil {
diff --git a/cmd/convert.go b/cmd/convert.go
index cb0510c722fc8..23a3d8dbe9d51 100644
--- a/cmd/convert.go
+++ b/cmd/convert.go
@@ -31,9 +31,9 @@ func runConvert(ctx *cli.Context) error {
 	log.Trace("AppWorkPath: %s", setting.AppWorkPath)
 	log.Trace("Custom path: %s", setting.CustomPath)
 	log.Trace("Log path: %s", setting.LogRootPath)
-	models.LoadConfigs()
+	setting.InitDBConfig()
 
-	if models.DbCfg.Type != "mysql" {
+	if !setting.Database.UseMySQL {
 		fmt.Println("This command can only be used with a MySQL database")
 		return nil
 	}
diff --git a/cmd/dump.go b/cmd/dump.go
index de289270d463d..1bf6901769fbc 100644
--- a/cmd/dump.go
+++ b/cmd/dump.go
@@ -58,7 +58,6 @@ It can be used for backup and capture Gitea server image to send to maintainer`,
 func runDump(ctx *cli.Context) error {
 	setting.NewContext()
 	setting.NewServices() // cannot access session settings otherwise
-	models.LoadConfigs()
 
 	err := models.SetEngine()
 	if err != nil {
@@ -104,8 +103,8 @@ func runDump(ctx *cli.Context) error {
 	}
 
 	targetDBType := ctx.String("database")
-	if len(targetDBType) > 0 && targetDBType != models.DbCfg.Type {
-		log.Printf("Dumping database %s => %s...", models.DbCfg.Type, targetDBType)
+	if len(targetDBType) > 0 && targetDBType != setting.Database.Type {
+		log.Printf("Dumping database %s => %s...", setting.Database.Type, targetDBType)
 	} else {
 		log.Printf("Dumping database...")
 	}
diff --git a/cmd/migrate.go b/cmd/migrate.go
index dde50a455f07f..1fa1d09e25378 100644
--- a/cmd/migrate.go
+++ b/cmd/migrate.go
@@ -30,7 +30,7 @@ func runMigrate(ctx *cli.Context) error {
 	log.Trace("AppWorkPath: %s", setting.AppWorkPath)
 	log.Trace("Custom path: %s", setting.CustomPath)
 	log.Trace("Log path: %s", setting.LogRootPath)
-	models.LoadConfigs()
+	setting.InitDBConfig()
 
 	if err := models.NewEngine(migrations.Migrate); err != nil {
 		log.Fatal("Failed to initialize ORM engine: %v", err)
diff --git a/contrib/pr/checkout.go b/contrib/pr/checkout.go
index 7e6351cc632d0..490d6760c83d8 100644
--- a/contrib/pr/checkout.go
+++ b/contrib/pr/checkout.go
@@ -79,16 +79,16 @@ func runPR() {
 	setting.CheckLFSVersion()
 	//models.LoadConfigs()
 	/*
-		models.DbCfg.Type = "sqlite3"
-		models.DbCfg.Path = ":memory:"
-		models.DbCfg.Timeout = 500
+		setting.Database.Type = "sqlite3"
+		setting.Database.Path = ":memory:"
+		setting.Database.Timeout = 500
 	*/
 	db := setting.Cfg.Section("database")
 	db.NewKey("DB_TYPE", "sqlite3")
 	db.NewKey("PATH", ":memory:")
-	setting.LogSQL = true
-	models.LoadConfigs()
+
 	routers.NewServices()
+	setting.Database.LogSQL = true
 	//x, err = xorm.NewEngine("sqlite3", "file::memory:?cache=shared")
 
 	var helper testfixtures.Helper = &testfixtures.SQLite{}
diff --git a/custom/conf/app.ini.sample b/custom/conf/app.ini.sample
index 73ca5e0030f49..f2763e44df78c 100644
--- a/custom/conf/app.ini.sample
+++ b/custom/conf/app.ini.sample
@@ -275,6 +275,10 @@ LOG_SQL = true
 DB_RETRIES = 10
 ; Backoff time per DB retry (time.Duration)
 DB_RETRY_BACKOFF = 3s
+; Max idle database connections on connnection pool, default is 0
+MAX_IDLE_CONNS = 0
+; Database connection max life time, default is 3s
+CONN_MAX_LIFETIME = 3s
 
 [indexer]
 ; Issue indexer type, currently support: bleve or db, default is bleve
diff --git a/docs/content/doc/advanced/config-cheat-sheet.en-us.md b/docs/content/doc/advanced/config-cheat-sheet.en-us.md
index ac309cecfa55b..8b5235f7164c3 100644
--- a/docs/content/doc/advanced/config-cheat-sheet.en-us.md
+++ b/docs/content/doc/advanced/config-cheat-sheet.en-us.md
@@ -166,6 +166,8 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 - `LOG_SQL`: **true**: Log the executed SQL.
 - `DB_RETRIES`: **10**: How many ORM init / DB connect attempts allowed.
 - `DB_RETRY_BACKOFF`: **3s**: time.Duration to wait before trying another ORM init / DB connect attempt, if failure occured.
+- `MAX_IDLE_CONNS` **0**: Max idle database connections on connnection pool, default is 0
+- `CONN_MAX_LIFETIME` **3s**: Database connection max lifetime
 
 ## Indexer (`indexer`)
 
diff --git a/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md b/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md
index 7a00216b9f40a..b4b9e4e3a92a6 100644
--- a/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md
+++ b/docs/content/doc/advanced/config-cheat-sheet.zh-cn.md
@@ -82,6 +82,8 @@ menu:
 - `CHARSET`: **utf8**: 仅当数据库为 MySQL 时有效, 可以为 "utf8" 或 "utf8mb4"。注意：如果使用 "utf8mb4"，你的 MySQL InnoDB 版本必须在 5.6 以上。
 - `PATH`: Tidb 或者 SQLite3 数据文件存放路径。
 - `LOG_SQL`: **true**: 显示生成的SQL，默认为真。
+- `MAX_IDLE_CONNS` **0**: 最大空闲数据库连接
+- `CONN_MAX_LIFETIME` **3s**: 数据库连接最大存活时间
 
 ## Indexer (`indexer`)
 
diff --git a/integrations/integration_test.go b/integrations/integration_test.go
index eaec2d509ee16..e4d506ee7d3d6 100644
--- a/integrations/integration_test.go
+++ b/integrations/integration_test.go
@@ -59,13 +59,13 @@ func TestMain(m *testing.M) {
 	routes.RegisterRoutes(mac)
 
 	var helper testfixtures.Helper
-	if setting.UseMySQL {
+	if setting.Database.UseMySQL {
 		helper = &testfixtures.MySQL{}
-	} else if setting.UsePostgreSQL {
+	} else if setting.Database.UsePostgreSQL {
 		helper = &testfixtures.PostgreSQL{}
-	} else if setting.UseSQLite3 {
+	} else if setting.Database.UseSQLite3 {
 		helper = &testfixtures.SQLite{}
-	} else if setting.UseMSSQL {
+	} else if setting.Database.UseMSSQL {
 		helper = &testfixtures.SQLServer{}
 	} else {
 		fmt.Println("Unsupported RDBMS for integration tests")
@@ -121,12 +121,12 @@ func initIntegrationTest() {
 	setting.SetCustomPathAndConf("", "", "")
 	setting.NewContext()
 	setting.CheckLFSVersion()
-	models.LoadConfigs()
+	setting.InitDBConfig()
 
 	switch {
-	case setting.UseMySQL:
+	case setting.Database.UseMySQL:
 		db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s)/",
-			models.DbCfg.User, models.DbCfg.Passwd, models.DbCfg.Host))
+			setting.Database.User, setting.Database.Passwd, setting.Database.Host))
 		defer db.Close()
 		if err != nil {
 			log.Fatalf("sql.Open: %v", err)
@@ -134,14 +134,14 @@ func initIntegrationTest() {
 		if _, err = db.Exec("CREATE DATABASE IF NOT EXISTS testgitea"); err != nil {
 			log.Fatalf("db.Exec: %v", err)
 		}
-	case setting.UsePostgreSQL:
+	case setting.Database.UsePostgreSQL:
 		db, err := sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/?sslmode=%s",
-			models.DbCfg.User, models.DbCfg.Passwd, models.DbCfg.Host, models.DbCfg.SSLMode))
+			setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.SSLMode))
 		defer db.Close()
 		if err != nil {
 			log.Fatalf("sql.Open: %v", err)
 		}
-		rows, err := db.Query(fmt.Sprintf("SELECT 1 FROM pg_database WHERE datname = '%s'", models.DbCfg.Name))
+		rows, err := db.Query(fmt.Sprintf("SELECT 1 FROM pg_database WHERE datname = '%s'", setting.Database.Name))
 		if err != nil {
 			log.Fatalf("db.Query: %v", err)
 		}
@@ -153,10 +153,10 @@ func initIntegrationTest() {
 		if _, err = db.Exec("CREATE DATABASE testgitea"); err != nil {
 			log.Fatalf("db.Exec: %v", err)
 		}
-	case setting.UseMSSQL:
-		host, port := models.ParseMSSQLHostPort(models.DbCfg.Host)
+	case setting.Database.UseMSSQL:
+		host, port := setting.ParseMSSQLHostPort(setting.Database.Host)
 		db, err := sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
-			host, port, "master", models.DbCfg.User, models.DbCfg.Passwd))
+			host, port, "master", setting.Database.User, setting.Database.Passwd))
 		if err != nil {
 			log.Fatalf("sql.Open: %v", err)
 		}
diff --git a/integrations/lfs_getobject_test.go b/integrations/lfs_getobject_test.go
index 42b64612fd9ea..bb269d5eeba45 100644
--- a/integrations/lfs_getobject_test.go
+++ b/integrations/lfs_getobject_test.go
@@ -39,7 +39,7 @@ func storeObjectInRepo(t *testing.T, repositoryID int64, content *[]byte) string
 	assert.NoError(t, err)
 	var lfsMetaObject *models.LFSMetaObject
 
-	if setting.UsePostgreSQL {
+	if setting.Database.UsePostgreSQL {
 		lfsMetaObject = &models.LFSMetaObject{ID: lfsID, Oid: oid, Size: int64(len(*content)), RepositoryID: repositoryID}
 	} else {
 		lfsMetaObject = &models.LFSMetaObject{Oid: oid, Size: int64(len(*content)), RepositoryID: repositoryID}
diff --git a/integrations/migration-test/migration_test.go b/integrations/migration-test/migration_test.go
index 858f339b89f92..3b47f0d7fc0d5 100644
--- a/integrations/migration-test/migration_test.go
+++ b/integrations/migration-test/migration_test.go
@@ -54,7 +54,7 @@ func initMigrationTest(t *testing.T) {
 
 	setting.NewContext()
 	setting.CheckLFSVersion()
-	models.LoadConfigs()
+	setting.InitDBConfig()
 	setting.NewLogServices(true)
 }
 
@@ -64,7 +64,7 @@ func availableVersions() ([]string, error) {
 		return nil, err
 	}
 	defer migrationsDir.Close()
-	versionRE, err := regexp.Compile("gitea-v(?P<version>.+)\\." + regexp.QuoteMeta(models.DbCfg.Type) + "\\.sql.gz")
+	versionRE, err := regexp.Compile("gitea-v(?P<version>.+)\\." + regexp.QuoteMeta(setting.Database.Type) + "\\.sql.gz")
 	if err != nil {
 		return nil, err
 	}
@@ -85,7 +85,7 @@ func availableVersions() ([]string, error) {
 }
 
 func readSQLFromFile(version string) (string, error) {
-	filename := fmt.Sprintf("integrations/migration-test/gitea-v%s.%s.sql.gz", version, models.DbCfg.Type)
+	filename := fmt.Sprintf("integrations/migration-test/gitea-v%s.%s.sql.gz", version, setting.Database.Type)
 
 	if _, err := os.Stat(filename); os.IsNotExist(err) {
 		return "", nil
@@ -114,17 +114,17 @@ func restoreOldDB(t *testing.T, version string) bool {
 	data, err := readSQLFromFile(version)
 	assert.NoError(t, err)
 	if len(data) == 0 {
-		integrations.Printf("No db found to restore for %s version: %s\n", models.DbCfg.Type, version)
+		integrations.Printf("No db found to restore for %s version: %s\n", setting.Database.Type, version)
 		return false
 	}
 
 	switch {
-	case setting.UseSQLite3:
-		os.Remove(models.DbCfg.Path)
-		err := os.MkdirAll(path.Dir(models.DbCfg.Path), os.ModePerm)
+	case setting.Database.UseSQLite3:
+		os.Remove(setting.Database.Path)
+		err := os.MkdirAll(path.Dir(setting.Database.Path), os.ModePerm)
 		assert.NoError(t, err)
 
-		db, err := sql.Open("sqlite3", fmt.Sprintf("file:%s?cache=shared&mode=rwc&_busy_timeout=%d", models.DbCfg.Path, models.DbCfg.Timeout))
+		db, err := sql.Open("sqlite3", fmt.Sprintf("file:%s?cache=shared&mode=rwc&_busy_timeout=%d", setting.Database.Path, setting.Database.Timeout))
 		assert.NoError(t, err)
 		defer db.Close()
 
@@ -132,20 +132,20 @@ func restoreOldDB(t *testing.T, version string) bool {
 		assert.NoError(t, err)
 		db.Close()
 
-	case setting.UseMySQL:
+	case setting.Database.UseMySQL:
 		db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s)/",
-			models.DbCfg.User, models.DbCfg.Passwd, models.DbCfg.Host))
+			setting.Database.User, setting.Database.Passwd, setting.Database.Host))
 		assert.NoError(t, err)
 		defer db.Close()
 
-		_, err = db.Exec(fmt.Sprintf("DROP DATABASE IF EXISTS %s", models.DbCfg.Name))
+		_, err = db.Exec(fmt.Sprintf("DROP DATABASE IF EXISTS %s", setting.Database.Name))
 		assert.NoError(t, err)
 
-		_, err = db.Exec(fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s", models.DbCfg.Name))
+		_, err = db.Exec(fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s", setting.Database.Name))
 		assert.NoError(t, err)
 
 		db, err = sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s)/%s?multiStatements=true",
-			models.DbCfg.User, models.DbCfg.Passwd, models.DbCfg.Host, models.DbCfg.Name))
+			setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.Name))
 		assert.NoError(t, err)
 		defer db.Close()
 
@@ -153,21 +153,21 @@ func restoreOldDB(t *testing.T, version string) bool {
 		assert.NoError(t, err)
 		db.Close()
 
-	case setting.UsePostgreSQL:
+	case setting.Database.UsePostgreSQL:
 		db, err := sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/?sslmode=%s",
-			models.DbCfg.User, models.DbCfg.Passwd, models.DbCfg.Host, models.DbCfg.SSLMode))
+			setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.SSLMode))
 		assert.NoError(t, err)
 		defer db.Close()
 
-		_, err = db.Exec(fmt.Sprintf("DROP DATABASE IF EXISTS %s", models.DbCfg.Name))
+		_, err = db.Exec(fmt.Sprintf("DROP DATABASE IF EXISTS %s", setting.Database.Name))
 		assert.NoError(t, err)
 
-		_, err = db.Exec(fmt.Sprintf("CREATE DATABASE %s", models.DbCfg.Name))
+		_, err = db.Exec(fmt.Sprintf("CREATE DATABASE %s", setting.Database.Name))
 		assert.NoError(t, err)
 		db.Close()
 
 		db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=%s",
-			models.DbCfg.User, models.DbCfg.Passwd, models.DbCfg.Host, models.DbCfg.Name, models.DbCfg.SSLMode))
+			setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.Name, setting.Database.SSLMode))
 		assert.NoError(t, err)
 		defer db.Close()
 
@@ -175,10 +175,10 @@ func restoreOldDB(t *testing.T, version string) bool {
 		assert.NoError(t, err)
 		db.Close()
 
-	case setting.UseMSSQL:
-		host, port := models.ParseMSSQLHostPort(models.DbCfg.Host)
+	case setting.Database.UseMSSQL:
+		host, port := setting.ParseMSSQLHostPort(setting.Database.Host)
 		db, err := sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
-			host, port, "master", models.DbCfg.User, models.DbCfg.Passwd))
+			host, port, "master", setting.Database.User, setting.Database.Passwd))
 		assert.NoError(t, err)
 		defer db.Close()
 
@@ -191,7 +191,7 @@ func restoreOldDB(t *testing.T, version string) bool {
 				dbname := statement[5 : len(statement)-1]
 				db.Close()
 				db, err = sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
-					host, port, dbname, models.DbCfg.User, models.DbCfg.Passwd))
+					host, port, dbname, setting.Database.User, setting.Database.Passwd))
 				assert.NoError(t, err)
 				defer db.Close()
 			}
@@ -210,7 +210,7 @@ func wrappedMigrate(x *xorm.Engine) error {
 
 func doMigrationTest(t *testing.T, version string) {
 	integrations.PrintCurrentTest(t)
-	integrations.Printf("Performing migration test for %s version: %s\n", models.DbCfg.Type, version)
+	integrations.Printf("Performing migration test for %s version: %s\n", setting.Database.Type, version)
 	if !restoreOldDB(t, version) {
 		return
 	}
@@ -227,7 +227,7 @@ func doMigrationTest(t *testing.T, version string) {
 func TestMigrations(t *testing.T) {
 	initMigrationTest(t)
 
-	dialect := models.DbCfg.Type
+	dialect := setting.Database.Type
 	versions, err := availableVersions()
 	assert.NoError(t, err)
 
diff --git a/models/convert.go b/models/convert.go
index c34be973c6b53..025f88b503870 100644
--- a/models/convert.go
+++ b/models/convert.go
@@ -4,11 +4,15 @@
 
 package models
 
-import "fmt"
+import (
+	"fmt"
+
+	"code.gitea.io/gitea/modules/setting"
+)
 
 // ConvertUtf8ToUtf8mb4 converts database and tables from utf8 to utf8mb4 if it's mysql
 func ConvertUtf8ToUtf8mb4() error {
-	_, err := x.Exec(fmt.Sprintf("ALTER DATABASE `%s` CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci", DbCfg.Name))
+	_, err := x.Exec(fmt.Sprintf("ALTER DATABASE `%s` CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci", setting.Database.Name))
 	if err != nil {
 		return err
 	}
diff --git a/models/migrations/migrations.go b/models/migrations/migrations.go
index fc086bfd464c1..7d97741a20d1f 100644
--- a/models/migrations/migrations.go
+++ b/models/migrations/migrations.go
@@ -296,7 +296,7 @@ func dropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 	// TODO: This will not work if there are foreign keys
 
 	switch {
-	case setting.UseSQLite3:
+	case setting.Database.UseSQLite3:
 		// First drop the indexes on the columns
 		res, errIndex := sess.Query(fmt.Sprintf("PRAGMA index_list(`%s`)", tableName))
 		if errIndex != nil {
@@ -372,7 +372,7 @@ func dropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 			return err
 		}
 
-	case setting.UsePostgreSQL:
+	case setting.Database.UsePostgreSQL:
 		cols := ""
 		for _, col := range columnNames {
 			if cols != "" {
@@ -383,7 +383,7 @@ func dropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 		if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE `%s` %s", tableName, cols)); err != nil {
 			return fmt.Errorf("Drop table `%s` columns %v: %v", tableName, columnNames, err)
 		}
-	case setting.UseMySQL, setting.UseTiDB:
+	case setting.Database.UseMySQL:
 		// Drop indexes on columns first
 		sql := fmt.Sprintf("SHOW INDEX FROM %s WHERE column_name IN ('%s')", tableName, strings.Join(columnNames, "','"))
 		res, err := sess.Query(sql)
@@ -409,7 +409,7 @@ func dropTableColumns(sess *xorm.Session, tableName string, columnNames ...strin
 		if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE `%s` %s", tableName, cols)); err != nil {
 			return fmt.Errorf("Drop table `%s` columns %v: %v", tableName, columnNames, err)
 		}
-	case setting.UseMSSQL:
+	case setting.Database.UseMSSQL:
 		cols := ""
 		for _, col := range columnNames {
 			if cols != "" {
diff --git a/models/migrations/v19.go b/models/migrations/v19.go
index 9793f405adee8..7728f5add6ec9 100644
--- a/models/migrations/v19.go
+++ b/models/migrations/v19.go
@@ -42,7 +42,7 @@ func generateAndMigrateGitHooks(x *xorm.Engine) (err error) {
 		}
 	)
 
-	return x.Where("id > 0").BufferSize(setting.IterateBufferSize).Iterate(new(Repository),
+	return x.Where("id > 0").BufferSize(setting.Database.IterateBufferSize).Iterate(new(Repository),
 		func(idx int, bean interface{}) error {
 			repo := bean.(*Repository)
 			user := new(User)
diff --git a/models/migrations/v22.go b/models/migrations/v22.go
index f991ae25fa6c6..faac74343b5e6 100644
--- a/models/migrations/v22.go
+++ b/models/migrations/v22.go
@@ -42,7 +42,7 @@ func generateAndMigrateWikiGitHooks(x *xorm.Engine) (err error) {
 		}
 	)
 
-	return x.Where("id > 0").BufferSize(setting.IterateBufferSize).Iterate(new(Repository),
+	return x.Where("id > 0").BufferSize(setting.Database.IterateBufferSize).Iterate(new(Repository),
 		func(idx int, bean interface{}) error {
 			repo := bean.(*Repository)
 			user := new(User)
diff --git a/models/migrations/v26.go b/models/migrations/v26.go
index 3d88c62923ed9..04277191f5ed9 100644
--- a/models/migrations/v26.go
+++ b/models/migrations/v26.go
@@ -36,7 +36,7 @@ func generateAndMigrateGitHookChains(x *xorm.Engine) (err error) {
 		hookTpl   = fmt.Sprintf("#!/usr/bin/env %s\ndata=$(cat)\nexitcodes=\"\"\nhookname=$(basename $0)\nGIT_DIR=${GIT_DIR:-$(dirname $0)}\n\nfor hook in ${GIT_DIR}/hooks/${hookname}.d/*; do\ntest -x \"${hook}\" || continue\necho \"${data}\" | \"${hook}\"\nexitcodes=\"${exitcodes} $?\"\ndone\n\nfor i in ${exitcodes}; do\n[ ${i} -eq 0 ] || exit ${i}\ndone\n", setting.ScriptType)
 	)
 
-	return x.Where("id > 0").BufferSize(setting.IterateBufferSize).Iterate(new(Repository),
+	return x.Where("id > 0").BufferSize(setting.Database.IterateBufferSize).Iterate(new(Repository),
 		func(idx int, bean interface{}) error {
 			repo := bean.(*Repository)
 			user := new(User)
diff --git a/models/migrations/v27.go b/models/migrations/v27.go
index e87c7ab68f582..12e5fbcdbfe23 100644
--- a/models/migrations/v27.go
+++ b/models/migrations/v27.go
@@ -41,8 +41,6 @@ func convertIntervalToDuration(x *xorm.Engine) (err error) {
 		_, err = sess.Exec("ALTER TABLE mirror MODIFY `interval` BIGINT")
 	case "postgres":
 		_, err = sess.Exec("ALTER TABLE mirror ALTER COLUMN \"interval\" SET DATA TYPE bigint")
-	case "tidb":
-		_, err = sess.Exec("ALTER TABLE mirror MODIFY `interval` BIGINT")
 	case "mssql":
 		_, err = sess.Exec("ALTER TABLE mirror ALTER COLUMN \"interval\" BIGINT")
 	case "sqlite3":
diff --git a/models/migrations/v33.go b/models/migrations/v33.go
index ae7612e68cdd7..566951db9622c 100644
--- a/models/migrations/v33.go
+++ b/models/migrations/v33.go
@@ -15,9 +15,9 @@ import (
 
 func removeActionColumns(x *xorm.Engine) error {
 	switch {
-	case setting.UseSQLite3:
+	case setting.Database.UseSQLite3:
 		log.Warn("Unable to drop columns in SQLite")
-	case setting.UseMySQL, setting.UsePostgreSQL, setting.UseMSSQL, setting.UseTiDB:
+	case setting.Database.UseMySQL, setting.Database.UsePostgreSQL, setting.Database.UseMSSQL:
 		if _, err := x.Exec("ALTER TABLE action DROP COLUMN act_user_name"); err != nil {
 			return fmt.Errorf("DROP COLUMN act_user_name: %v", err)
 		} else if _, err = x.Exec("ALTER TABLE action DROP COLUMN repo_user_name"); err != nil {
diff --git a/models/migrations/v45.go b/models/migrations/v45.go
index 92cb81781975c..99baff2c8b30e 100644
--- a/models/migrations/v45.go
+++ b/models/migrations/v45.go
@@ -13,9 +13,9 @@ import (
 
 func removeIndexColumnFromRepoUnitTable(x *xorm.Engine) (err error) {
 	switch {
-	case setting.UseSQLite3:
+	case setting.Database.UseSQLite3:
 		log.Warn("Unable to drop columns in SQLite")
-	case setting.UseMySQL, setting.UsePostgreSQL, setting.UseMSSQL, setting.UseTiDB:
+	case setting.Database.UseMySQL, setting.Database.UsePostgreSQL, setting.Database.UseMSSQL:
 		if _, err := x.Exec("ALTER TABLE repo_unit DROP COLUMN `index`"); err != nil {
 			// Ignoring this error in case we run this migration second time (after migration reordering)
 			log.Warn("DROP COLUMN index: %v", err)
diff --git a/models/migrations/v50.go b/models/migrations/v50.go
index a15914f0ee60c..23b1bb526eb16 100644
--- a/models/migrations/v50.go
+++ b/models/migrations/v50.go
@@ -40,9 +40,9 @@ func migrateProtectedBranchStruct(x *xorm.Engine) error {
 	}
 
 	switch {
-	case setting.UseSQLite3:
+	case setting.Database.UseSQLite3:
 		log.Warn("Unable to drop columns in SQLite")
-	case setting.UseMySQL, setting.UsePostgreSQL, setting.UseMSSQL, setting.UseTiDB:
+	case setting.Database.UseMySQL, setting.Database.UsePostgreSQL, setting.Database.UseMSSQL:
 		if _, err := x.Exec("ALTER TABLE protected_branch DROP COLUMN can_push"); err != nil {
 			// Ignoring this error in case we run this migration second time (after migration reordering)
 			log.Warn("DROP COLUMN can_push (skipping): %v", err)
diff --git a/models/migrations/v67.go b/models/migrations/v67.go
index 74d3f379cd2c0..6cf3dd4d19310 100644
--- a/models/migrations/v67.go
+++ b/models/migrations/v67.go
@@ -80,7 +80,7 @@ func removeStaleWatches(x *xorm.Engine) error {
 	}
 
 	repoCache := make(map[int64]*Repository)
-	err := sess.BufferSize(setting.IterateBufferSize).Iterate(new(Watch),
+	err := sess.BufferSize(setting.Database.IterateBufferSize).Iterate(new(Watch),
 		func(idx int, bean interface{}) error {
 			watch := bean.(*Watch)
 
@@ -117,7 +117,7 @@ func removeStaleWatches(x *xorm.Engine) error {
 	}
 
 	repoCache = make(map[int64]*Repository)
-	err = sess.BufferSize(setting.IterateBufferSize).
+	err = sess.BufferSize(setting.Database.IterateBufferSize).
 		Distinct("issue_watch.user_id", "issue.repo_id").
 		Join("INNER", "issue", "issue_watch.issue_id = issue.id").
 		Where("issue_watch.is_watching = ?", true).
diff --git a/models/migrations/v81.go b/models/migrations/v81.go
index 56bb8477e6bcd..48e96508d9cfb 100644
--- a/models/migrations/v81.go
+++ b/models/migrations/v81.go
@@ -14,8 +14,6 @@ func changeU2FCounterType(x *xorm.Engine) error {
 	var err error
 
 	switch x.Dialect().DriverName() {
-	case "tidb":
-		fallthrough
 	case "mysql":
 		_, err = x.Exec("ALTER TABLE `u2f_registration` MODIFY `counter` BIGINT")
 	case "postgres":
diff --git a/models/models.go b/models/models.go
index 4c925fa5706cd..04acc77aa94c7 100644
--- a/models/models.go
+++ b/models/models.go
@@ -9,12 +9,6 @@ import (
 	"database/sql"
 	"errors"
 	"fmt"
-	"net/url"
-	"os"
-	"path"
-	"path/filepath"
-	"strings"
-	"time"
 
 	"code.gitea.io/gitea/modules/setting"
 
@@ -52,24 +46,11 @@ type Engine interface {
 }
 
 var (
-	x                  *xorm.Engine
-	supportedDatabases = []string{"mysql", "postgres", "mssql"}
-	tables             []interface{}
+	x      *xorm.Engine
+	tables []interface{}
 
 	// HasEngine specifies if we have a xorm.Engine
 	HasEngine bool
-
-	// DbCfg holds the database settings
-	DbCfg struct {
-		Type, Host, Name, User, Passwd, Path, SSLMode, Charset string
-		Timeout                                                int
-	}
-
-	// EnableSQLite3 use SQLite3
-	EnableSQLite3 bool
-
-	// EnableTiDB enable TiDB
-	EnableTiDB bool
 )
 
 func init() {
@@ -139,120 +120,13 @@ func init() {
 	}
 }
 
-// LoadConfigs loads the database settings
-func LoadConfigs() {
-	sec := setting.Cfg.Section("database")
-	DbCfg.Type = sec.Key("DB_TYPE").String()
-	switch DbCfg.Type {
-	case "sqlite3":
-		setting.UseSQLite3 = true
-	case "mysql":
-		setting.UseMySQL = true
-	case "postgres":
-		setting.UsePostgreSQL = true
-	case "tidb":
-		setting.UseTiDB = true
-	case "mssql":
-		setting.UseMSSQL = true
-	}
-	DbCfg.Host = sec.Key("HOST").String()
-	DbCfg.Name = sec.Key("NAME").String()
-	DbCfg.User = sec.Key("USER").String()
-	if len(DbCfg.Passwd) == 0 {
-		DbCfg.Passwd = sec.Key("PASSWD").String()
-	}
-	DbCfg.SSLMode = sec.Key("SSL_MODE").MustString("disable")
-	DbCfg.Charset = sec.Key("CHARSET").In("utf8", []string{"utf8", "utf8mb4"})
-	DbCfg.Path = sec.Key("PATH").MustString(filepath.Join(setting.AppDataPath, "gitea.db"))
-	DbCfg.Timeout = sec.Key("SQLITE_TIMEOUT").MustInt(500)
-}
-
-// parsePostgreSQLHostPort parses given input in various forms defined in
-// https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
-// and returns proper host and port number.
-func parsePostgreSQLHostPort(info string) (string, string) {
-	host, port := "127.0.0.1", "5432"
-	if strings.Contains(info, ":") && !strings.HasSuffix(info, "]") {
-		idx := strings.LastIndex(info, ":")
-		host = info[:idx]
-		port = info[idx+1:]
-	} else if len(info) > 0 {
-		host = info
-	}
-	return host, port
-}
-
-func getPostgreSQLConnectionString(dbHost, dbUser, dbPasswd, dbName, dbParam, dbsslMode string) (connStr string) {
-	host, port := parsePostgreSQLHostPort(dbHost)
-	if host[0] == '/' { // looks like a unix socket
-		connStr = fmt.Sprintf("postgres://%s:%s@:%s/%s%ssslmode=%s&host=%s",
-			url.PathEscape(dbUser), url.PathEscape(dbPasswd), port, dbName, dbParam, dbsslMode, host)
-	} else {
-		connStr = fmt.Sprintf("postgres://%s:%s@%s:%s/%s%ssslmode=%s",
-			url.PathEscape(dbUser), url.PathEscape(dbPasswd), host, port, dbName, dbParam, dbsslMode)
-	}
-	return
-}
-
-// ParseMSSQLHostPort splits the host into host and port
-func ParseMSSQLHostPort(info string) (string, string) {
-	host, port := "127.0.0.1", "1433"
-	if strings.Contains(info, ":") {
-		host = strings.Split(info, ":")[0]
-		port = strings.Split(info, ":")[1]
-	} else if strings.Contains(info, ",") {
-		host = strings.Split(info, ",")[0]
-		port = strings.TrimSpace(strings.Split(info, ",")[1])
-	} else if len(info) > 0 {
-		host = info
-	}
-	return host, port
-}
-
 func getEngine() (*xorm.Engine, error) {
-	connStr := ""
-	var Param = "?"
-	if strings.Contains(DbCfg.Name, Param) {
-		Param = "&"
-	}
-	switch DbCfg.Type {
-	case "mysql":
-		connType := "tcp"
-		if DbCfg.Host[0] == '/' { // looks like a unix socket
-			connType = "unix"
-		}
-		tls := DbCfg.SSLMode
-		if tls == "disable" { // allow (Postgres-inspired) default value to work in MySQL
-			tls = "false"
-		}
-		connStr = fmt.Sprintf("%s:%s@%s(%s)/%s%scharset=%s&parseTime=true&tls=%s",
-			DbCfg.User, DbCfg.Passwd, connType, DbCfg.Host, DbCfg.Name, Param, DbCfg.Charset, tls)
-	case "postgres":
-		connStr = getPostgreSQLConnectionString(DbCfg.Host, DbCfg.User, DbCfg.Passwd, DbCfg.Name, Param, DbCfg.SSLMode)
-	case "mssql":
-		host, port := ParseMSSQLHostPort(DbCfg.Host)
-		connStr = fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;", host, port, DbCfg.Name, DbCfg.User, DbCfg.Passwd)
-	case "sqlite3":
-		if !EnableSQLite3 {
-			return nil, errors.New("this binary version does not build support for SQLite3")
-		}
-		if err := os.MkdirAll(path.Dir(DbCfg.Path), os.ModePerm); err != nil {
-			return nil, fmt.Errorf("Failed to create directories: %v", err)
-		}
-		connStr = fmt.Sprintf("file:%s?cache=shared&mode=rwc&_busy_timeout=%d", DbCfg.Path, DbCfg.Timeout)
-	case "tidb":
-		if !EnableTiDB {
-			return nil, errors.New("this binary version does not build support for TiDB")
-		}
-		if err := os.MkdirAll(path.Dir(DbCfg.Path), os.ModePerm); err != nil {
-			return nil, fmt.Errorf("Failed to create directories: %v", err)
-		}
-		connStr = "goleveldb://" + DbCfg.Path
-	default:
-		return nil, fmt.Errorf("Unknown database type: %s", DbCfg.Type)
+	connStr, err := setting.DBConnStr()
+	if err != nil {
+		return nil, err
 	}
 
-	return xorm.NewEngine(DbCfg.Type, connStr)
+	return xorm.NewEngine(setting.Database.Type, connStr)
 }
 
 // NewTestEngine sets a new test xorm.Engine
@@ -280,11 +154,11 @@ func SetEngine() (err error) {
 	x.SetMapper(core.GonicMapper{})
 	// WARNING: for serv command, MUST remove the output to os.stdout,
 	// so use log file to instead print to stdout.
-	x.SetLogger(NewXORMLogger(setting.LogSQL))
-	x.ShowSQL(setting.LogSQL)
-	if DbCfg.Type == "mysql" {
-		x.SetMaxIdleConns(0)
-		x.SetConnMaxLifetime(3 * time.Second)
+	x.SetLogger(NewXORMLogger(setting.Database.LogSQL))
+	x.ShowSQL(setting.Database.LogSQL)
+	if setting.Database.UseMySQL {
+		x.SetMaxIdleConns(setting.Database.MaxIdleConns)
+		x.SetConnMaxLifetime(setting.Database.ConnMaxLifetime)
 	}
 
 	return nil
diff --git a/models/models_test.go b/models/models_test.go
index 6df3b4e04864b..37e9a352f8af1 100644
--- a/models/models_test.go
+++ b/models/models_test.go
@@ -1,5 +1,4 @@
-// Copyright 2016 The Gogs Authors. All rights reserved.
-// Copyright 2018 The Gitea Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
@@ -11,99 +10,19 @@ import (
 	"path/filepath"
 	"testing"
 
+	"code.gitea.io/gitea/modules/setting"
+
 	"github.com/stretchr/testify/assert"
 )
 
-func Test_parsePostgreSQLHostPort(t *testing.T) {
-	tests := []struct {
-		HostPort string
-		Host     string
-		Port     string
-	}{
-		{
-			HostPort: "127.0.0.1:1234",
-			Host:     "127.0.0.1",
-			Port:     "1234",
-		},
-		{
-			HostPort: "127.0.0.1",
-			Host:     "127.0.0.1",
-			Port:     "5432",
-		},
-		{
-			HostPort: "[::1]:1234",
-			Host:     "[::1]",
-			Port:     "1234",
-		},
-		{
-			HostPort: "[::1]",
-			Host:     "[::1]",
-			Port:     "5432",
-		},
-		{
-			HostPort: "/tmp/pg.sock:1234",
-			Host:     "/tmp/pg.sock",
-			Port:     "1234",
-		},
-		{
-			HostPort: "/tmp/pg.sock",
-			Host:     "/tmp/pg.sock",
-			Port:     "5432",
-		},
-	}
-	for _, test := range tests {
-		host, port := parsePostgreSQLHostPort(test.HostPort)
-		assert.Equal(t, test.Host, host)
-		assert.Equal(t, test.Port, port)
-	}
-}
-
-func Test_getPostgreSQLConnectionString(t *testing.T) {
-	tests := []struct {
-		Host    string
-		Port    string
-		User    string
-		Passwd  string
-		Name    string
-		Param   string
-		SSLMode string
-		Output  string
-	}{
-		{
-			Host:    "/tmp/pg.sock",
-			Port:    "4321",
-			User:    "testuser",
-			Passwd:  "space space !#$%^^%^```-=?=",
-			Name:    "gitea",
-			Param:   "",
-			SSLMode: "false",
-			Output:  "postgres://testuser:space%20space%20%21%23$%25%5E%5E%25%5E%60%60%60-=%3F=@:5432/giteasslmode=false&host=/tmp/pg.sock",
-		},
-		{
-			Host:    "localhost",
-			Port:    "1234",
-			User:    "pgsqlusername",
-			Passwd:  "I love Gitea!",
-			Name:    "gitea",
-			Param:   "",
-			SSLMode: "true",
-			Output:  "postgres://pgsqlusername:I%20love%20Gitea%21@localhost:5432/giteasslmode=true",
-		},
-	}
-
-	for _, test := range tests {
-		connStr := getPostgreSQLConnectionString(test.Host, test.User, test.Passwd, test.Name, test.Param, test.SSLMode)
-		assert.Equal(t, test.Output, connStr)
-	}
-}
-
 func TestDumpDatabase(t *testing.T) {
 	assert.NoError(t, PrepareTestDatabase())
 
 	dir, err := ioutil.TempDir(os.TempDir(), "dump")
 	assert.NoError(t, err)
 
-	for _, dbType := range supportedDatabases {
+	for _, dbName := range setting.SupportedDatabases {
+		dbType := setting.GetDBTypeByName(dbName)
 		assert.NoError(t, DumpDatabase(filepath.Join(dir, dbType+".sql"), dbType))
 	}
 }
diff --git a/models/repo.go b/models/repo.go
index a70350576e86d..507521357e343 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -2201,7 +2201,7 @@ func GitFsck() {
 	log.Trace("Doing: GitFsck")
 
 	if err := x.
-		Where("id>0 AND is_fsck_enabled=?", true).BufferSize(setting.IterateBufferSize).
+		Where("id>0 AND is_fsck_enabled=?", true).BufferSize(setting.Database.IterateBufferSize).
 		Iterate(new(Repository),
 			func(idx int, bean interface{}) error {
 				repo := bean.(*Repository)
@@ -2225,7 +2225,7 @@ func GitFsck() {
 func GitGcRepos() error {
 	args := append([]string{"gc"}, setting.Git.GCArgs...)
 	return x.
-		Where("id > 0").BufferSize(setting.IterateBufferSize).
+		Where("id > 0").BufferSize(setting.Database.IterateBufferSize).
 		Iterate(new(Repository),
 			func(idx int, bean interface{}) error {
 				repo := bean.(*Repository)
@@ -2568,7 +2568,7 @@ func (repo *Repository) generateRandomAvatar(e Engine) error {
 // RemoveRandomAvatars removes the randomly generated avatars that were created for repositories
 func RemoveRandomAvatars() error {
 	return x.
-		Where("id > 0").BufferSize(setting.IterateBufferSize).
+		Where("id > 0").BufferSize(setting.Database.IterateBufferSize).
 		Iterate(new(Repository),
 			func(idx int, bean interface{}) error {
 				repository := bean.(*Repository)
diff --git a/models/unit_tests.go b/models/unit_tests.go
index 80dc4feb96d5e..b53302dad4bae 100644
--- a/models/unit_tests.go
+++ b/models/unit_tests.go
@@ -49,7 +49,7 @@ func MainTest(m *testing.M, pathToGiteaRoot string) {
 	setting.RunUser = "runuser"
 	setting.SSH.Port = 3000
 	setting.SSH.Domain = "try.gitea.io"
-	setting.UseSQLite3 = true
+	setting.Database.UseSQLite3 = true
 	setting.RepoRootPath, err = ioutil.TempDir(os.TempDir(), "repos")
 	if err != nil {
 		fatalTestError("TempDir: %v\n", err)
diff --git a/models/user.go b/models/user.go
index 037ae0397bab6..c8664cc4c80d8 100644
--- a/models/user.go
+++ b/models/user.go
@@ -40,7 +40,6 @@ import (
 	"golang.org/x/crypto/scrypt"
 	"golang.org/x/crypto/ssh"
 	"xorm.io/builder"
-	"xorm.io/core"
 )
 
 // UserType defines the user type
@@ -1432,9 +1431,9 @@ func (opts *SearchUserOptions) toConds() builder.Cond {
 
 	if opts.OwnerID > 0 {
 		var exprCond builder.Cond
-		if DbCfg.Type == core.MYSQL {
+		if setting.Database.UseMySQL {
 			exprCond = builder.Expr("org_user.org_id = user.id")
-		} else if DbCfg.Type == core.MSSQL {
+		} else if setting.Database.UseMSSQL {
 			exprCond = builder.Expr("org_user.org_id = [user].id")
 		} else {
 			exprCond = builder.Expr("org_user.org_id = \"user\".id")
diff --git a/models/user_heatmap.go b/models/user_heatmap.go
index b511b5fa62d89..3d9e0683fc786 100644
--- a/models/user_heatmap.go
+++ b/models/user_heatmap.go
@@ -21,13 +21,13 @@ func GetUserHeatmapDataByUser(user *User) ([]*UserHeatmapData, error) {
 	var groupBy string
 	var groupByName = "timestamp" // We need this extra case because mssql doesn't allow grouping by alias
 	switch {
-	case setting.UseSQLite3:
+	case setting.Database.UseSQLite3:
 		groupBy = "strftime('%s', strftime('%Y-%m-%d', created_unix, 'unixepoch'))"
-	case setting.UseMySQL:
+	case setting.Database.UseMySQL:
 		groupBy = "UNIX_TIMESTAMP(DATE(FROM_UNIXTIME(created_unix)))"
-	case setting.UsePostgreSQL:
+	case setting.Database.UsePostgreSQL:
 		groupBy = "extract(epoch from date_trunc('day', to_timestamp(created_unix)))"
-	case setting.UseMSSQL:
+	case setting.Database.UseMSSQL:
 		groupBy = "datediff(SECOND, '19700101', dateadd(DAY, 0, datediff(day, 0, dateadd(s, created_unix, '19700101'))))"
 		groupByName = groupBy
 	}
diff --git a/modules/setting/database.go b/modules/setting/database.go
new file mode 100644
index 0000000000000..2cac4824dfbcd
--- /dev/null
+++ b/modules/setting/database.go
@@ -0,0 +1,171 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package setting
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+var (
+	// SupportedDatabases includes all supported databases type
+	SupportedDatabases = []string{"MySQL", "PostgreSQL", "MSSQL"}
+	dbTypes            = map[string]string{"MySQL": "mysql", "PostgreSQL": "postgres", "MSSQL": "mssql", "SQLite3": "sqlite3"}
+
+	// EnableSQLite3 use SQLite3, set by build flag
+	EnableSQLite3 bool
+
+	// Database holds the database settings
+	Database = struct {
+		Type              string
+		Host              string
+		Name              string
+		User              string
+		Passwd            string
+		SSLMode           string
+		Path              string
+		LogSQL            bool
+		Charset           string
+		Timeout           int // seconds
+		UseSQLite3        bool
+		UseMySQL          bool
+		UseMSSQL          bool
+		UsePostgreSQL     bool
+		DBConnectRetries  int
+		DBConnectBackoff  time.Duration
+		MaxIdleConns      int
+		ConnMaxLifetime   time.Duration
+		IterateBufferSize int
+	}{
+		Timeout:         500,
+		MaxIdleConns:    0,
+		ConnMaxLifetime: 3 * time.Second,
+	}
+)
+
+// GetDBTypeByName returns the dataase type as it defined on XORM according the given name
+func GetDBTypeByName(name string) string {
+	return dbTypes[name]
+}
+
+// InitDBConfig loads the database settings
+func InitDBConfig() {
+	sec := Cfg.Section("database")
+	Database.Type = sec.Key("DB_TYPE").String()
+	switch Database.Type {
+	case "sqlite3":
+		Database.UseSQLite3 = true
+	case "mysql":
+		Database.UseMySQL = true
+	case "postgres":
+		Database.UsePostgreSQL = true
+	case "mssql":
+		Database.UseMSSQL = true
+	}
+	Database.Host = sec.Key("HOST").String()
+	Database.Name = sec.Key("NAME").String()
+	Database.User = sec.Key("USER").String()
+	if len(Database.Passwd) == 0 {
+		Database.Passwd = sec.Key("PASSWD").String()
+	}
+	Database.SSLMode = sec.Key("SSL_MODE").MustString("disable")
+	Database.Charset = sec.Key("CHARSET").In("utf8", []string{"utf8", "utf8mb4"})
+	Database.Path = sec.Key("PATH").MustString(filepath.Join(AppDataPath, "gitea.db"))
+	Database.Timeout = sec.Key("SQLITE_TIMEOUT").MustInt(500)
+	Database.MaxIdleConns = sec.Key("MAX_IDLE_CONNS").MustInt(0)
+	Database.ConnMaxLifetime = sec.Key("CONN_MAX_LIFE_TIME").MustDuration(3 * time.Second)
+
+	Database.IterateBufferSize = sec.Key("ITERATE_BUFFER_SIZE").MustInt(50)
+	Database.LogSQL = sec.Key("LOG_SQL").MustBool(true)
+	Database.DBConnectRetries = sec.Key("DB_RETRIES").MustInt(10)
+	Database.DBConnectBackoff = sec.Key("DB_RETRY_BACKOFF").MustDuration(3 * time.Second)
+}
+
+// DBConnStr returns database connection string
+func DBConnStr() (string, error) {
+	connStr := ""
+	var Param = "?"
+	if strings.Contains(Database.Name, Param) {
+		Param = "&"
+	}
+	switch Database.Type {
+	case "mysql":
+		connType := "tcp"
+		if Database.Host[0] == '/' { // looks like a unix socket
+			connType = "unix"
+		}
+		tls := Database.SSLMode
+		if tls == "disable" { // allow (Postgres-inspired) default value to work in MySQL
+			tls = "false"
+		}
+		connStr = fmt.Sprintf("%s:%s@%s(%s)/%s%scharset=%s&parseTime=true&tls=%s",
+			Database.User, Database.Passwd, connType, Database.Host, Database.Name, Param, Database.Charset, tls)
+	case "postgres":
+		connStr = getPostgreSQLConnectionString(Database.Host, Database.User, Database.Passwd, Database.Name, Param, Database.SSLMode)
+	case "mssql":
+		host, port := ParseMSSQLHostPort(Database.Host)
+		connStr = fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;", host, port, Database.Name, Database.User, Database.Passwd)
+	case "sqlite3":
+		if !EnableSQLite3 {
+			return "", errors.New("this binary version does not build support for SQLite3")
+		}
+		if err := os.MkdirAll(path.Dir(Database.Path), os.ModePerm); err != nil {
+			return "", fmt.Errorf("Failed to create directories: %v", err)
+		}
+		connStr = fmt.Sprintf("file:%s?cache=shared&mode=rwc&_busy_timeout=%d", Database.Path, Database.Timeout)
+	default:
+		return "", fmt.Errorf("Unknown database type: %s", Database.Type)
+	}
+
+	return connStr, nil
+}
+
+// parsePostgreSQLHostPort parses given input in various forms defined in
+// https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
+// and returns proper host and port number.
+func parsePostgreSQLHostPort(info string) (string, string) {
+	host, port := "127.0.0.1", "5432"
+	if strings.Contains(info, ":") && !strings.HasSuffix(info, "]") {
+		idx := strings.LastIndex(info, ":")
+		host = info[:idx]
+		port = info[idx+1:]
+	} else if len(info) > 0 {
+		host = info
+	}
+	return host, port
+}
+
+func getPostgreSQLConnectionString(dbHost, dbUser, dbPasswd, dbName, dbParam, dbsslMode string) (connStr string) {
+	host, port := parsePostgreSQLHostPort(dbHost)
+	if host[0] == '/' { // looks like a unix socket
+		connStr = fmt.Sprintf("postgres://%s:%s@:%s/%s%ssslmode=%s&host=%s",
+			url.PathEscape(dbUser), url.PathEscape(dbPasswd), port, dbName, dbParam, dbsslMode, host)
+	} else {
+		connStr = fmt.Sprintf("postgres://%s:%s@%s:%s/%s%ssslmode=%s",
+			url.PathEscape(dbUser), url.PathEscape(dbPasswd), host, port, dbName, dbParam, dbsslMode)
+	}
+	return
+}
+
+// ParseMSSQLHostPort splits the host into host and port
+func ParseMSSQLHostPort(info string) (string, string) {
+	host, port := "127.0.0.1", "1433"
+	if strings.Contains(info, ":") {
+		host = strings.Split(info, ":")[0]
+		port = strings.Split(info, ":")[1]
+	} else if strings.Contains(info, ",") {
+		host = strings.Split(info, ",")[0]
+		port = strings.TrimSpace(strings.Split(info, ",")[1])
+	} else if len(info) > 0 {
+		host = info
+	}
+	return host, port
+}
diff --git a/models/models_sqlite.go b/modules/setting/database_sqlite.go
similarity index 77%
rename from models/models_sqlite.go
rename to modules/setting/database_sqlite.go
index 3889aceb847d1..623326ddc2fc1 100644
--- a/models/models_sqlite.go
+++ b/modules/setting/database_sqlite.go
@@ -4,7 +4,7 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
-package models
+package setting
 
 import (
 	_ "github.com/mattn/go-sqlite3"
@@ -12,5 +12,5 @@ import (
 
 func init() {
 	EnableSQLite3 = true
-	supportedDatabases = append(supportedDatabases, "sqlite3")
+	SupportedDatabases = append(SupportedDatabases, "SQLite3")
 }
diff --git a/modules/setting/database_test.go b/modules/setting/database_test.go
new file mode 100644
index 0000000000000..a90be2a68756d
--- /dev/null
+++ b/modules/setting/database_test.go
@@ -0,0 +1,94 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package setting
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_parsePostgreSQLHostPort(t *testing.T) {
+	tests := []struct {
+		HostPort string
+		Host     string
+		Port     string
+	}{
+		{
+			HostPort: "127.0.0.1:1234",
+			Host:     "127.0.0.1",
+			Port:     "1234",
+		},
+		{
+			HostPort: "127.0.0.1",
+			Host:     "127.0.0.1",
+			Port:     "5432",
+		},
+		{
+			HostPort: "[::1]:1234",
+			Host:     "[::1]",
+			Port:     "1234",
+		},
+		{
+			HostPort: "[::1]",
+			Host:     "[::1]",
+			Port:     "5432",
+		},
+		{
+			HostPort: "/tmp/pg.sock:1234",
+			Host:     "/tmp/pg.sock",
+			Port:     "1234",
+		},
+		{
+			HostPort: "/tmp/pg.sock",
+			Host:     "/tmp/pg.sock",
+			Port:     "5432",
+		},
+	}
+	for _, test := range tests {
+		host, port := parsePostgreSQLHostPort(test.HostPort)
+		assert.Equal(t, test.Host, host)
+		assert.Equal(t, test.Port, port)
+	}
+}
+
+func Test_getPostgreSQLConnectionString(t *testing.T) {
+	tests := []struct {
+		Host    string
+		Port    string
+		User    string
+		Passwd  string
+		Name    string
+		Param   string
+		SSLMode string
+		Output  string
+	}{
+		{
+			Host:    "/tmp/pg.sock",
+			Port:    "4321",
+			User:    "testuser",
+			Passwd:  "space space !#$%^^%^```-=?=",
+			Name:    "gitea",
+			Param:   "",
+			SSLMode: "false",
+			Output:  "postgres://testuser:space%20space%20%21%23$%25%5E%5E%25%5E%60%60%60-=%3F=@:5432/giteasslmode=false&host=/tmp/pg.sock",
+		},
+		{
+			Host:    "localhost",
+			Port:    "1234",
+			User:    "pgsqlusername",
+			Passwd:  "I love Gitea!",
+			Name:    "gitea",
+			Param:   "",
+			SSLMode: "true",
+			Output:  "postgres://pgsqlusername:I%20love%20Gitea%21@localhost:5432/giteasslmode=true",
+		},
+	}
+
+	for _, test := range tests {
+		connStr := getPostgreSQLConnectionString(test.Host, test.User, test.Passwd, test.Name, test.Param, test.SSLMode)
+		assert.Equal(t, test.Output, connStr)
+	}
+}
diff --git a/modules/setting/setting.go b/modules/setting/setting.go
index 123aa8f1039ea..77b8f20640cdf 100644
--- a/modules/setting/setting.go
+++ b/modules/setting/setting.go
@@ -148,16 +148,6 @@ var (
 	DisableGitHooks       bool
 	PasswordHashAlgo      string
 
-	// Database settings
-	UseSQLite3       bool
-	UseMySQL         bool
-	UseMSSQL         bool
-	UsePostgreSQL    bool
-	UseTiDB          bool
-	LogSQL           bool
-	DBConnectRetries int
-	DBConnectBackoff time.Duration
-
 	// UI settings
 	UI = struct {
 		ExplorePagingNum    int
@@ -348,16 +338,19 @@ var (
 	ShowFooterTemplateLoadTime bool
 
 	// Global setting objects
-	Cfg               *ini.File
-	CustomPath        string // Custom directory path
-	CustomConf        string
-	CustomPID         string
-	ProdMode          bool
-	RunUser           string
-	IsWindows         bool
-	HasRobotsTxt      bool
-	InternalToken     string // internal access token
-	IterateBufferSize int
+	Cfg           *ini.File
+	CustomPath    string // Custom directory path
+	CustomConf    string
+	CustomPID     string
+	ProdMode      bool
+	RunUser       string
+	IsWindows     bool
+	HasRobotsTxt  bool
+	InternalToken string // internal access token
+
+	// UILocation is the location on the UI, so that we can display the time on UI.
+	// Currently only show the default time.Local, it could be added to app.ini after UI is ready
+	UILocation = time.Local
 )
 
 // DateLang transforms standard language locale name to corresponding value in datetime plugin.
@@ -775,10 +768,6 @@ func NewContext() {
 	CSRFCookieHTTPOnly = sec.Key("CSRF_COOKIE_HTTP_ONLY").MustBool(true)
 
 	InternalToken = loadInternalToken(sec)
-	IterateBufferSize = Cfg.Section("database").Key("ITERATE_BUFFER_SIZE").MustInt(50)
-	LogSQL = Cfg.Section("database").Key("LOG_SQL").MustBool(true)
-	DBConnectRetries = Cfg.Section("database").Key("DB_RETRIES").MustInt(10)
-	DBConnectBackoff = Cfg.Section("database").Key("DB_RETRY_BACKOFF").MustDuration(3 * time.Second)
 
 	sec = Cfg.Section("attachment")
 	AttachmentPath = sec.Key("PATH").MustString(path.Join(AppDataPath, "attachments"))
@@ -1037,6 +1026,7 @@ func loadOrGenerateInternalToken(sec *ini.Section) string {
 
 // NewServices initializes the services
 func NewServices() {
+	InitDBConfig()
 	newService()
 	NewLogServices(false)
 	newCacheService()
diff --git a/routers/admin/admin.go b/routers/admin/admin.go
index 54fbddc58e175..496aca375f508 100644
--- a/routers/admin/admin.go
+++ b/routers/admin/admin.go
@@ -289,7 +289,7 @@ func Config(ctx *context.Context) {
 	ctx.Data["LFS"] = setting.LFS
 
 	ctx.Data["Service"] = setting.Service
-	ctx.Data["DbCfg"] = models.DbCfg
+	ctx.Data["DbCfg"] = setting.Database
 	ctx.Data["Webhook"] = setting.Webhook
 
 	ctx.Data["MailerEnabled"] = false
@@ -333,7 +333,7 @@ func Config(ctx *context.Context) {
 	ctx.Data["AccessLogTemplate"] = setting.AccessLogTemplate
 	ctx.Data["DisableRouterLog"] = setting.DisableRouterLog
 	ctx.Data["EnableXORMLog"] = setting.EnableXORMLog
-	ctx.Data["LogSQL"] = setting.LogSQL
+	ctx.Data["LogSQL"] = setting.Database.LogSQL
 
 	ctx.HTML(200, tplConfig)
 }
diff --git a/routers/init.go b/routers/init.go
index 4724da8627a28..fdf90904ce759 100644
--- a/routers/init.go
+++ b/routers/init.go
@@ -47,16 +47,16 @@ func NewServices() {
 // In case of problems connecting to DB, retry connection. Eg, PGSQL in Docker Container on Synology
 func initDBEngine() (err error) {
 	log.Info("Beginning ORM engine initialization.")
-	for i := 0; i < setting.DBConnectRetries; i++ {
-		log.Info("ORM engine initialization attempt #%d/%d...", i+1, setting.DBConnectRetries)
+	for i := 0; i < setting.Database.DBConnectRetries; i++ {
+		log.Info("ORM engine initialization attempt #%d/%d...", i+1, setting.Database.DBConnectRetries)
 		if err = models.NewEngine(migrations.Migrate); err == nil {
 			break
-		} else if i == setting.DBConnectRetries-1 {
+		} else if i == setting.Database.DBConnectRetries-1 {
 			return err
 		}
-		log.Error("ORM engine initialization attempt #%d/%d failed. Error: %v", i+1, setting.DBConnectRetries, err)
-		log.Info("Backing off for %d seconds", int64(setting.DBConnectBackoff/time.Second))
-		time.Sleep(setting.DBConnectBackoff)
+		log.Error("ORM engine initialization attempt #%d/%d failed. Error: %v", i+1, setting.Database.DBConnectRetries, err)
+		log.Info("Backing off for %d seconds", int64(setting.Database.DBConnectBackoff/time.Second))
+		time.Sleep(setting.Database.DBConnectBackoff)
 	}
 	models.HasEngine = true
 	return nil
@@ -73,7 +73,7 @@ func GlobalInit() {
 	log.Trace("AppWorkPath: %s", setting.AppWorkPath)
 	log.Trace("Custom path: %s", setting.CustomPath)
 	log.Trace("Log path: %s", setting.LogRootPath)
-	models.LoadConfigs()
+
 	NewServices()
 
 	if setting.InstallLock {
@@ -102,12 +102,9 @@ func GlobalInit() {
 		models.InitDeliverHooks()
 		models.InitTestPullRequests()
 	}
-	if models.EnableSQLite3 {
+	if setting.EnableSQLite3 {
 		log.Info("SQLite3 Supported")
 	}
-	if models.EnableTiDB {
-		log.Info("TiDB Supported")
-	}
 	checkRunMode()
 
 	if setting.InstallLock && setting.SSH.StartBuiltinServer {
diff --git a/routers/install.go b/routers/install.go
index 6d29bcf887a7a..16888adc824a0 100644
--- a/routers/install.go
+++ b/routers/install.go
@@ -40,11 +40,7 @@ func InstallInit(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("install.install")
 	ctx.Data["PageIsInstall"] = true
 
-	dbOpts := []string{"MySQL", "PostgreSQL", "MSSQL"}
-	if models.EnableSQLite3 {
-		dbOpts = append(dbOpts, "SQLite3")
-	}
-	ctx.Data["DbOptions"] = dbOpts
+	ctx.Data["DbOptions"] = setting.SupportedDatabases
 }
 
 // Install render installation page
@@ -52,21 +48,21 @@ func Install(ctx *context.Context) {
 	form := auth.InstallForm{}
 
 	// Database settings
-	form.DbHost = models.DbCfg.Host
-	form.DbUser = models.DbCfg.User
-	form.DbPasswd = models.DbCfg.Passwd
-	form.DbName = models.DbCfg.Name
-	form.DbPath = models.DbCfg.Path
-	form.Charset = models.DbCfg.Charset
+	form.DbHost = setting.Database.Host
+	form.DbUser = setting.Database.User
+	form.DbPasswd = setting.Database.Passwd
+	form.DbName = setting.Database.Name
+	form.DbPath = setting.Database.Path
+	form.Charset = setting.Database.Charset
 
 	ctx.Data["CurDbOption"] = "MySQL"
-	switch models.DbCfg.Type {
+	switch setting.Database.Type {
 	case "postgres":
 		ctx.Data["CurDbOption"] = "PostgreSQL"
 	case "mssql":
 		ctx.Data["CurDbOption"] = "MSSQL"
 	case "sqlite3":
-		if models.EnableSQLite3 {
+		if setting.EnableSQLite3 {
 			ctx.Data["CurDbOption"] = "SQLite3"
 		}
 	}
@@ -144,18 +140,18 @@ func InstallPost(ctx *context.Context, form auth.InstallForm) {
 
 	// Pass basic check, now test configuration.
 	// Test database setting.
-	dbTypes := map[string]string{"MySQL": "mysql", "PostgreSQL": "postgres", "MSSQL": "mssql", "SQLite3": "sqlite3"}
-	models.DbCfg.Type = dbTypes[form.DbType]
-	models.DbCfg.Host = form.DbHost
-	models.DbCfg.User = form.DbUser
-	models.DbCfg.Passwd = form.DbPasswd
-	models.DbCfg.Name = form.DbName
-	models.DbCfg.SSLMode = form.SSLMode
-	models.DbCfg.Charset = form.Charset
-	models.DbCfg.Path = form.DbPath
-
-	if (models.DbCfg.Type == "sqlite3") &&
-		len(models.DbCfg.Path) == 0 {
+
+	setting.Database.Type = setting.GetDBTypeByName(form.DbType)
+	setting.Database.Host = form.DbHost
+	setting.Database.User = form.DbUser
+	setting.Database.Passwd = form.DbPasswd
+	setting.Database.Name = form.DbName
+	setting.Database.SSLMode = form.SSLMode
+	setting.Database.Charset = form.Charset
+	setting.Database.Path = form.DbPath
+
+	if (setting.Database.Type == "sqlite3") &&
+		len(setting.Database.Path) == 0 {
 		ctx.Data["Err_DbPath"] = true
 		ctx.RenderWithErr(ctx.Tr("install.err_empty_db_path"), tplInstall, &form)
 		return
@@ -265,14 +261,14 @@ func InstallPost(ctx *context.Context, form auth.InstallForm) {
 			log.Error("Failed to load custom conf '%s': %v", setting.CustomConf, err)
 		}
 	}
-	cfg.Section("database").Key("DB_TYPE").SetValue(models.DbCfg.Type)
-	cfg.Section("database").Key("HOST").SetValue(models.DbCfg.Host)
-	cfg.Section("database").Key("NAME").SetValue(models.DbCfg.Name)
-	cfg.Section("database").Key("USER").SetValue(models.DbCfg.User)
-	cfg.Section("database").Key("PASSWD").SetValue(models.DbCfg.Passwd)
-	cfg.Section("database").Key("SSL_MODE").SetValue(models.DbCfg.SSLMode)
-	cfg.Section("database").Key("CHARSET").SetValue(models.DbCfg.Charset)
-	cfg.Section("database").Key("PATH").SetValue(models.DbCfg.Path)
+	cfg.Section("database").Key("DB_TYPE").SetValue(setting.Database.Type)
+	cfg.Section("database").Key("HOST").SetValue(setting.Database.Host)
+	cfg.Section("database").Key("NAME").SetValue(setting.Database.Name)
+	cfg.Section("database").Key("USER").SetValue(setting.Database.User)
+	cfg.Section("database").Key("PASSWD").SetValue(setting.Database.Passwd)
+	cfg.Section("database").Key("SSL_MODE").SetValue(setting.Database.SSLMode)
+	cfg.Section("database").Key("CHARSET").SetValue(setting.Database.Charset)
+	cfg.Section("database").Key("PATH").SetValue(setting.Database.Path)
 
 	cfg.Section("").Key("APP_NAME").SetValue(form.AppName)
 	cfg.Section("repository").Key("ROOT").SetValue(form.RepoRootPath)