tomcat 内存参数优化示例

CMS垃圾回收算法

CATALINA_OPTS="$CATALINA_OPTS -Xms1024M -Xmx2048M -XX:PermSize=384M -XX:MaxPermSize=512M"
CATALINA_OPTS="$CATALINA_OPTS -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:MaxGCPauseMillis=300"
CATALINA_OPTS="$CATALINA_OPTS -XX:+CMSPermGenSweepingEnabled -XX:+CMSClassUnloadingEnabled"
CATALINA_OPTS="$CATALINA_OPTS -XX:-DisableExplicitGC"
CATALINA_OPTS="$CATALINA_OPTS -XX:ParallelGCThreads=2"
CATALINA_OPTS="$CATALINA_OPTS -XX:+PrintGC -XX:+PrintGCTimeStamps -XX:+PrintGCDetails"
CATALINA_OPTS="$CATALINA_OPTS -Xloggc:`dirname "$0"`/../logs/gc.log"
CATALINA_OPTS="$CATALINA_OPTS -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=15 -XX:GCLogFileSize=8M"

CATALINA_OPTS="$CATALINA_OPTS -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=18480
-Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false"
CATALINA_OPTS="$CATALINA_OPTS -XX:+UnlockCommercialFeatures -XX:+FlightRecorder"
CATALINA_OPTS="$CATALINA_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/data/heapdump"

G1垃圾回收算法

CATALINA_OPTS="$CATALINA_OPTS -Xms10g -Xmx10g  -XX:PermSize=1024M -XX:MaxPermSize=2048M "
CATALINA_OPTS="$CATALINA_OPTS -XX:+DisableExplicitGC  -XX:+PrintGC -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:-PrintGCTimeStamps -Xloggc:logs/gc.log"
JAVA_OPTS="$JAVA_OPTS -server"
CATALINA_OPTS="$CATALINA_OPTS -XX:+UseG1GC -XX:MaxGCPauseMillis=300"


CATALINA_OPTS="$CATALINA_OPTS -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=18480
-Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false"

定义tomcat发布目录

[smmprd@(LIVE)smm-app10 localhost]$ pwd
/data/server/tomcats/tomcat7_8480_storeService/conf/Catalina/localhost
[smmprd@(LIVE)smm-app10 localhost]$ cat storeService.xml 
<Context path="/storeService" docBase="/data/server/apps/storeService" privileged="true" antiResourceLocking="false" antiJARLocking="false">
</Context>