Github user lizhanhui commented on the issue:
https://github.com/apache/incubator-rocketmq/pull/58
Hi @yuweitaocn , if you examine the options here carefully, you would find
there is no "target pause time-goal", aka, RocketMQ does not set this option:
-XX:MaxGCPauseMillis=xyz. So it's fine to set "young generation size with the
-Xmn option".
As a matter of fact, if you read the following section that's closely
following the part you quoted
> Therefore, when you evaluate the G1 GC for throughput, relax your
pause-time target. Setting too aggressive a goal indicates that you are willing
to bear an increase in garbage collection overhead, which has a direct impact
on throughput. When you evaluate the G1 GC for latency, you set your desired
(soft) real-time goal, and the G1 GC will try to meet it. As a side effect,
throughput may suffer.
You will find the current settings make sense.
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