diff --git a/.eslintrc b/.eslintrc
index 6bbf0e8..5fbca9e 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -25,7 +25,7 @@
     "no-implied-eval": 2,
     "no-labels": 2,
     "no-with": 2,
-    "no-loop-func": 1,
+    "no-loop-func": 0,
     "no-native-reassign": 2,
     "no-redeclare": [2, {"builtinGlobals": true}],
     "no-delete-var": 2,
diff --git a/README.md b/README.md
index b471e6f..1ebe3a3 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,7 @@ require('xprofiler')();
 * **patch_http**: 是否对原生 http 模块进行 patch，输出 http 请求相关信息，默认 `true`
 * **patch_http_timeout**: 默认 http 请求超时时间，单位秒，作为 http 请求统计，默认 `30`
 * **check_throw**: `xprofiler` 启动时检测错误时是否需要 throw，默认 `true`
-* **auto_incr_heap_limit_size**: `enable_auto_incr_heap_limit` 开启后，每次自动增加的堆上限大小，默认为 `512` (MB)
+* **auto_incr_heap_limit_size**: `enable_auto_incr_heap_limit` 开启后，每次自动增加的堆上限大小，默认为 `256` (MB)
 * **enable_log_uv_handles**: 是否要采集 libuv 句柄的详细分类信息，比如 tcp 句柄数量，timers 数量，文件句柄数量等，默认为 `true`
 * **enable_fatal_error_hook**: 是否需要在 V8 出现 FatalError 时配置钩子，默认 `true`
 * **enable_fatal_error_report**: 是否需要在 V8 出现 FataLError 时导出 Report 文件，默认 `true`
diff --git a/test/fixtures/cases/limit.js b/test/fixtures/cases/limit.js
new file mode 100644
index 0000000..193df3d
--- /dev/null
+++ b/test/fixtures/cases/limit.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const path = require('path');
+const { filterTestCaseByPlatform } = require('../utils');
+
+const exitFatalErrorScriptPath = path.join(__dirname, '../scripts/fatal_error.js');
+
+exports = module.exports = function () {
+  const list = [
+    {
+      title: 'limit hook is valid',
+      subTitle: 'auto increase heap limit is ok.',
+      jspath: exitFatalErrorScriptPath,
+    }
+  ];
+
+  return filterTestCaseByPlatform(list);
+};
\ No newline at end of file
diff --git a/test/fixtures/scripts/fatal_error.js b/test/fixtures/scripts/fatal_error.js
index d01b762..189a181 100644
--- a/test/fixtures/scripts/fatal_error.js
+++ b/test/fixtures/scripts/fatal_error.js
@@ -16,6 +16,6 @@ process.send({ type: utils.clientConst.xprofilerDone });
 const array = [];
 
 setInterval(() => {
-  array.push(new Array(10e6).fill('*'));
-  console.log('now rss:', process.memoryUsage().rss / 1024 / 1024 + ' Mb');
+  array.push(new Array(0.5 * 10e6).fill('*'));
+  console.log('now rss:', process.memoryUsage().rss / 1024 / 1024 + ' MB');
 }, Number(process.env.XPROFILER_FATAL_ERROR_INTERVAL) || 1);
\ No newline at end of file
diff --git a/test/limit.test.js b/test/limit.test.js
new file mode 100644
index 0000000..71a75dc
--- /dev/null
+++ b/test/limit.test.js
@@ -0,0 +1,70 @@
+'use strict';
+
+const os = require('os');
+const fs = require('fs');
+const cp = require('child_process');
+const path = require('path');
+const expect = require('expect.js');
+const promisify = require('util').promisify;
+const readdir = promisify(fs.readdir);
+const unlink = promisify(fs.unlink);
+const utils = require('./fixtures/utils');
+const cases = require('./fixtures/cases/limit')();
+
+const currentPlatform = os.platform();
+
+const logdir = utils.createLogDir('logdir_limit');
+
+const casesLength = cases.length;
+
+for (const cse of cases) {
+  const ospt = cse.platform || currentPlatform;
+  describe(`[${ospt}] ${cse.title}`, function () {
+    const initialHeapLimit = 128;
+    const autoIncreaseHeapLimitSize = 128;
+    const MB = 1024 * 1024;
+
+    let stdout = '';
+    let subprocess = null;
+    before(async function () {
+      subprocess = cp.fork(cse.jspath, {
+        execArgv: [`--max-old-space-size=${initialHeapLimit}`],
+        env: Object.assign({}, process.env, {
+          XPROFILER_LOG_DIR: logdir,
+          XPROFILER_LOG_LEVEL: 2,
+          XPROFILER_LOG_TYPE: 1,
+          XPROFILER_ENABLE_AUTO_INCR_HEAP_LIMIT: 'YES',
+          XPROFILER_AUTO_INCR_HEAP_LIMIT_SIZE: autoIncreaseHeapLimitSize,
+          XPROFILER_FATAL_ERROR_INTERVAL: 500,
+        }, cse.env),
+        stdio: [0, 'pipe', 'pipe', 'ipc'],
+      });
+      subprocess.stdout.on('data', chunk => stdout += chunk.toString());
+      await utils.sleep(5000);
+      subprocess.kill();
+      console.log('========= stdout =========\n\n', stdout, '\n========= end =========');
+    });
+    after(async function () {
+      const files = await readdir(logdir);
+      for (const file of files) {
+        await unlink(path.join(logdir, file));
+      }
+      if (cse === cases[casesLength - 1]) {
+        utils.cleanDir(logdir);
+      }
+
+      subprocess.kill();
+    });
+
+    for (let i = 1; i < 3; i++) {
+      it(`${cse.subTitle} with ${i} times heap increase factor`, function () {
+        const increaseLog = `current_heap_limit is ${(initialHeapLimit + (i - 1) * autoIncreaseHeapLimitSize) * MB}, `
+          + `initial_heap_limit is ${initialHeapLimit * MB}, `
+          + `auto_incr_heap_limit_size is ${autoIncreaseHeapLimitSize}, `
+          + `increased_heap is ${initialHeapLimit * MB + i * autoIncreaseHeapLimitSize * MB}`;
+        console.log('increaseLog:', increaseLog);
+        expect(stdout).to.contain(increaseLog);
+      });
+    }
+  });
+}
\ No newline at end of file