Tomcat網頁加載過慢的排查---調整time_wait連接過多

1、Tomcat運行內存

JAVA_OPTS="-server -Xms1024m -Xmx6144m -Xss1024K"

2、server.xml 配置

vim server.xml

<Connector port="16000" protocol="HTTP/1.1"
connectionTimeout="40000"
redirectPort="8443" URIEncoding="UTF-8"
acceptCount="4000" maxThreads="5000"
compression="on" compressionMinSize="2048"
compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain"
disableUploadTimeout="true" debug="0"
maxHttpHeaderSize="8192" useBodyEncodingForURI="true" minProcessors="100" maxProcessors="5000"
minSpareThreads="1000" maxSpareThreads="4000" enableLookups="false"/>

這樣設置啟用壓縮，設置最大連接數。

3、java隨機數函數設置

jdk目錄下：jdk1.8.0_131/jre/lib/security

vim java.security

找到securerandom.source=file:/dev/random將其替換為：securerandom.source=file:/dev/./urandom

4、tcp 連接的time_wait參數

vi  /etc/sysctl.conf

net.ipv4.tcp_max_tw_buckets=3200

net.ipv4.tcp_tw_reuse=1

net.ipv4.tcp_tw_recycle=1

# sysctl  -p

# netstat  -lanput| grep  18082 |grep  TIME_WAIT|wc  -l  &&  netstat  -lanput|grep  18081 |grep  TIME_WAIT|wc  -l

 將 tcp 連接time_wait的數量控制在3200