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

[wl...@apache.org]

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wlliqipeng pushed a commit to branch develop
in repository https://gitbox.apache.org/repos/asf/rocketmq.git


The following commit(s) were added to refs/heads/develop by this push:
     new 12ccd50  [RIP-9] Add the system configuration option doc: Direct ByteBuffer memory size
     new a83c621  Merge pull request #1044 from Crab2died/develop
12ccd50 is described below

commit 12ccd50806bafae2d8c4a6fe0cff668a96ecb8db
Author: 螃蟹以死 <hw...@126.com>
AuthorDate: Tue Mar 5 17:55:50 2019 +0800

    [RIP-9] Add the system configuration option doc: Direct ByteBuffer memory size
    
    [RIP-9] Add the system configuration option doc: Direct ByteBuffer memory size
---
 docs/en/Configuration_System.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/en/Configuration_System.md b/docs/en/Configuration_System.md
index 2f29c3b..6354ffe 100644
--- a/docs/en/Configuration_System.md
+++ b/docs/en/Configuration_System.md
@@ -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