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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2018/12/13 01:16:06 UTC

[GitHub] Cicizz opened a new issue #601: Why use spinlocks by default？

Cicizz opened a new issue #601: Why use spinlocks by default？
URL: https://github.com/apache/rocketmq/issues/601
 
 
   Hello.
   When I upgrade rocketmq version 3.2.6 to 4.31,I found some configuration defaults changed
   `useReentrantLockWhenPutMessage=false`
   `sendMessageThreadPoolNums=1`
   `sendThreadPoolQueueCapacity=10000`
   but when I was doing a send message performance test,I found the TPS is very low and cpu is high.so I changed the configuration:
   `useReentrantLockWhenPutMessage=true`
   `sendMessageThreadPoolNums=32`
   `sendThreadPoolQueueCapacity=100000`
   I wonder why use this default configuration?
   
   ** The machine configuration **
   8cpu and 16g memory and 300g disk

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