tomcat 优化jvm参考

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tomcatnum=`ps -ef|grep 'bin/catalina.sh'|egrep -v grep |wc -l`
mem=`free -g|awk '/Mem/{print $2}'`
echo $mem  $tomcatnum
a=`expr $mem / $tomcatnum + 1`
echo $a

$a是几。jvm就设置几G

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ps -ef|grep 'bin/catalina.sh'|egrep -v grep

cp catalina.sh catalina.sh.`date +%F`

cp catalina.sh catalina.sh.`date +%F`
\cp 8catalina.sh8  catalina.sh
ls catalina.sh*

cp catalina.sh catalina.sh.`date +%F`
\cp 4catalina.sh4  catalina.sh
ls catalina.sh*

cp catalina.sh catalina.sh.`date +%F`
\cp 2catalina.sh2  catalina.sh
ls catalina.sh*

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ps -ef|grep `pwd|awk -F'/' '{print $(NF-1)}'`

ps -ef|grep `pwd|awk -F'/' '{print $(NF-1)}'`|awk '{print $2}' |xargs kill -9

/etc/init.d/`pwd|awk -F'/' '{print $(NF-1)}'` start

ps -ef|grep `pwd|awk -F'/' '{print $(NF-1)}'`

/wdzj/java/admin_tomcat/bin/

cp catalina.sh catalina.sh.`date +%F`
ls catalina.sh*

Jvm优化参考
8G:
JAVA_OPTS='-Xms4096m -Xmx4096m -XX:PermSize=512M  -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC'
4G:
JAVA_OPTS='-Xms2048m -Xmx2048m -XX:PermSize=256M  -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC'
2G:
JAVA_OPTS='-Xms1024m -Xmx1024m -XX:PermSize=128M  -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC'