diff --git a/CHANGELOG.asciidoc b/CHANGELOG.asciidoc
index b7e80480397..65f7ffa0721 100644
--- a/CHANGELOG.asciidoc
+++ b/CHANGELOG.asciidoc
@@ -27,6 +27,7 @@ https://github.com/elastic/beats/compare/v1.2.3...1.3[Check the HEAD diff]
 
 *Affecting all Beats*
 - Fix output modes backoff counter reset. {issue}1803[1803] {pull}1814[1814] {pull}1818[1818]
+- Set logstash output default bulk_max_size to 2048. {issue}1662[1662]
 
 *Packetbeat*
 
diff --git a/filebeat/etc/filebeat.yml b/filebeat/etc/filebeat.yml
index 3f3caede47f..eb81c6d5d02 100644
--- a/filebeat/etc/filebeat.yml
+++ b/filebeat/etc/filebeat.yml
@@ -282,6 +282,10 @@ output:
     # Number of workers per Logstash host.
     #worker: 1
 
+    # The maximum number of events to bulk into a single batch window. The
+    # default is 2048.
+    #bulk_max_size: 2048
+
     # Set gzip compression level.
     #compression_level: 3
 
diff --git a/libbeat/etc/libbeat.yml b/libbeat/etc/libbeat.yml
index 81f4002088e..3483d4d240b 100644
--- a/libbeat/etc/libbeat.yml
+++ b/libbeat/etc/libbeat.yml
@@ -111,6 +111,10 @@ output:
     # Number of workers per Logstash host.
     #worker: 1
 
+    # The maximum number of events to bulk into a single batch window. The
+    # default is 2048.
+    #bulk_max_size: 2048
+
     # Set gzip compression level.
     #compression_level: 3
 
diff --git a/libbeat/outputs/logstash/logstash.go b/libbeat/outputs/logstash/logstash.go
index 51a3ffeddf5..4394832c57e 100644
--- a/libbeat/outputs/logstash/logstash.go
+++ b/libbeat/outputs/logstash/logstash.go
@@ -44,7 +44,7 @@ const (
 	logstashDefaultTimeout   = 30 * time.Second
 	logstasDefaultMaxTimeout = 90 * time.Second
 	defaultSendRetries       = 3
-	defaultMaxWindowSize     = 1024
+	defaultMaxWindowSize     = 2048
 	defaultCompressionLevel  = 3
 )
 
diff --git a/packetbeat/etc/packetbeat.yml b/packetbeat/etc/packetbeat.yml
index 5334d6c6e6f..082cfb68058 100644
--- a/packetbeat/etc/packetbeat.yml
+++ b/packetbeat/etc/packetbeat.yml
@@ -250,6 +250,10 @@ output:
     # Number of workers per Logstash host.
     #worker: 1
 
+    # The maximum number of events to bulk into a single batch window. The
+    # default is 2048.
+    #bulk_max_size: 2048
+
     # Set gzip compression level.
     #compression_level: 3
 
diff --git a/topbeat/etc/topbeat.yml b/topbeat/etc/topbeat.yml
index 7c7dfbff6c7..c856b1fe0a3 100644
--- a/topbeat/etc/topbeat.yml
+++ b/topbeat/etc/topbeat.yml
@@ -137,6 +137,10 @@ output:
     # Number of workers per Logstash host.
     #worker: 1
 
+    # The maximum number of events to bulk into a single batch window. The
+    # default is 2048.
+    #bulk_max_size: 2048
+
     # Set gzip compression level.
     #compression_level: 3
 
diff --git a/winlogbeat/etc/winlogbeat.yml b/winlogbeat/etc/winlogbeat.yml
index 67aa3d0789a..8a75513866f 100644
--- a/winlogbeat/etc/winlogbeat.yml
+++ b/winlogbeat/etc/winlogbeat.yml
@@ -136,6 +136,10 @@ output:
     # Number of workers per Logstash host.
     #worker: 1
 
+    # The maximum number of events to bulk into a single batch window. The
+    # default is 2048.
+    #bulk_max_size: 2048
+
     # Set gzip compression level.
     #compression_level: 3