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[RIP-9] Add the system configuration option doc: Direct ByteBuffer memory size

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[RIP-9] Add the system configuration option doc: Direct ByteBuffer memory size
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螃蟹以死
2019-03-05 17:55:50 +08:00
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commit 12ccd50806
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docs/en/Configuration_System.md
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@@ -8,6 +8,10 @@ The latest released version of JDK 1.8 is recommended. Set the same Xms and Xmx
-server -Xms8g -Xmx8g -Xmn4g
Direct ByteBuffer memory size setting. Full GC will be triggered when the Direct ByteBuffer up to the specified size:
-XX:MaxDirectMemorySize=15g
If you don’t care about the boot time of RocketMQ broker, pre-touch the Java heap to make sure that every page will be allocated during JVM initialization is a better choice. Those who don’t care about the boot time can enable it:
-XX:+AlwaysPreTouch