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tomcat 优化

Tomcat优化

禁用tomcat的AJP协议

vim server.xml

注释：

<!-- <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> -->

修改通讯模式BIO修改为NIO提高并发处理能力

#去掉注释

<Connector port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"

启用外部连接池

#去掉注释并修改maxThreads：

<!--
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
maxThreads="300" minSpareThreads="4"/>
-->

#去掉注释并修改protocol：

<Connector executor="tomcatThreadPool"
port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"
connectionTimeout="20000"
redirectPort="8443" />

#删除俩参数：

<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"/> （这是删除后的）
# <Connector executor="tomcatThreadPool"下面添加：
port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="1000"
minSpareThreads="100"
maxSpareThreads="200"
acceptCount="1000"
disableUploadTimeout="true"
connectionTimeout="20000"
URIEncoding="UTF-8"
enableLookups="false"
compression="on"
compressionMinSize="2048"
compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain,image/gif,image/jpg,image/png"
redirectPort="8443" />

JVM调优生产配置

编辑catalina.sh配置文件

[root@tomcat1 ~]# vim /usr/local/tomcat8/bin/catalina.sh

# OS specific support. $var _must_ be set to either true or false.下面添加

JAVA_OPTS="-server -Xms1024m -Xmx2048m -XX:PermSize=512m -XX:MaxPermSize=512m -XX:+UseConcMarkSweepGC -XX:+UseParallelGCThreads=8 -XX:CMSInitiatingOccupancyFraction=80 -XX:
+UseCMSCompactAtFullCollection -XX:CMSFullGCsBeforeCompaction=0 -XX:-PrintGC -XX:-PrintGCDetails -XX:-PrintGCTimeStamps -Xloggc:../logs/gc.log"

-Xms 堆内存初始大小，单位m、g
-Xmx 堆内存最大允许大小，一般不要大于物理内存的80%
-XX:PermSize 非堆内存初始大小，一般应用设置初始化200m，最大1024m就够了
-XX:MaxPermSize 非堆内存最大允许大小
-XX:+UseParallelGCThreads=8 并行收集器线程数，同时有多少个线程进行垃圾回收，一般与CPU数量相等
-XX:+UseParallelOldGC 指定老年代为并行收集
-XX:+UseConcMarkSweepGC CMS收集器（并发收集器）
-XX:+UseCMSCompactAtFullCollection 开启内存空间压缩和整理，防止过多内存碎片

生产配置实例

#server.xml配置文件下：
[root@tomcat1 ~]# vim /usr/local/tomcat8/conf/server.xml

# <Connector executor="tomcatThreadPool"下面添加：
port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="1000"
minSpareThreads="100"
maxSpareThreads="200"
acceptCount="1000"
disableUploadTimeout="true"
connectionTimeout="20000"
URIEncoding="UTF-8"
enableLookups="false"
compression="on"
compressionMinSize="2048"
compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain,image/gif,image/jpg,image/png"
redirectPort="8443" />

参数说明：