[GitHub] [servicecomb-java-chassis] libai245 opened a new issue #2502: 服务使用http2.0后进行压测，接口性能下降

Fri, 13 Aug 2021 00:09:30 -0700 


libai245 opened a new issue #2502:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2502


   我们对后端服务进行了http2.0改造，但是性能出下降情况，而且下降的很大，使用http1.0时TPS为1.8W，使用http2.0时TPS仅为6K
   查看性能日志cse_metrics.log后发现在过滤阶段性能差别很大
   
![image](https://user-images.githubusercontent.com/13653371/129316565-c474cdcc-5bbd-4b4a-b539-65d536f54df1.png)
   
   查看线程信息后发现很多线程进入了阻塞状态
   
![image](https://user-images.githubusercontent.com/13653371/129317116-546c3de1-f089-43c8-8ebe-51396c5afc40.png)
   
   
![image](https://user-images.githubusercontent.com/13653371/129317134-d83e5522-9787-4b89-950c-f963d916da24.png)
   
   查看截图中方法发现Http2ServerRequestImpl中很多方法都对同一个connection加了锁
   
![image](https://user-images.githubusercontent.com/13653371/129317303-d952cbdc-7436-4699-bea0-2e9fd2cccb95.png)
   
![image](https://user-images.githubusercontent.com/13653371/129317326-5f3df1c8-d307-4452-8665-7e9fbdff61f9.png)
   
   而HttpServerRequestImpl中没有加锁
   
![image](https://user-images.githubusercontent.com/13653371/129317402-829aedf6-a3f5-48ab-b4e3-0667484546d3.png)
   
![image](https://user-images.githubusercontent.com/13653371/129317418-645bcbd8-1bfb-459d-a740-1a3efe937bb0.png)
   问题应该是在过滤阶段，很多过滤器调用了锁方法，导致锁竞争激烈，所以HTTP2.0性能下降了
   
   
   想问下出现这种问题应该优化
   


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