tomcat性能优化（JAVA_OPTS）

　　1，outofmemoryError对应：

在tomcat/bin目录下，找到max_mem.sh文件（如果没有则找etenv.sh），修改Xmx和Xms配置，如下：

#!/bin/sh 
export JAVA_OPTS="-Xmx1024m -Xms512m"

 

     2，启动tomcat线程池：

在tomcat/conf目录下，找到server.xml文件，配置如下：

 

<!--The connectors can use a shared executor, you can define one or more named thread pools-->

<Executor name="tomcatThreadPool" namePrefix="catalina-exec-app-"
maxThreads="300" maxIdleTime="300000" minSpareThreads="10"/>

<!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Documentation at :
Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
Java AJP Connector: /docs/config/ajp.html
APR (HTTP/AJP) Connector: /docs/apr.html
Define a non-SSL HTTP/1.1 Connector on port 8080
-->
<!-- <Connector port="8943" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" address="127.0.0.1" /> -->
<!-- A "Connector" using the shared thread pool-->

<Connector executor="tomcatThreadPool"
port="8943" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" 
minProcessors="2" 
maxProcessors="50" 
acceptCount="1000"/>

 

各种含义自己百度，就不一一叙述了。

 

另外，如果发现tomcat的内存一直在增加，不会减少，肯定是自己写的代码有内存没有释放的地方，特别是调用第三方服务的地方。