Linux下Tomcat优化

/etc/profile
export JAVA_OPTS="-server -showversion -Xms2048m -Xmx2048m -XX:PermSize=256m -XX:MaxPermSize=256m"
export JAVA_OPTS="$JAVA_OPTS -d64 -XX:CICompilerCount=8 -XX:+UseCompressedOops"
export JAVA_OPTS="$JAVA_OPTS -XX:SurvivorRatio=4 -XX:TargetSurvivorRatio=90"
export JAVA_OPTS="$JAVA_OPTS -XX:ReservedCodeCacheSize=256m -XX:-UseAdaptiveSizePolicy"
export JAVA_OPTS="$JAVA_OPTS -Duser.timezone=Asia/Shanghai -XX:-DontCompileHugeMethods"
export JAVA_OPTS="$JAVA_OPTS -Xss256k -XX:+AggressiveOpts -XX:+UseBiasedLocking"
export JAVA_OPTS="$JAVA_OPTS -XX:MaxTenuringThreshold=31 -XX:+CMSParallelRemarkEnabled "
export JAVA_OPTS="$JAVA_OPTS -XX:+UseCMSCompactAtFullCollection -XX:LargePageSizeInBytes=256m -XX:+UseFastAccessorMethods"
export JAVA_OPTS="$JAVA_OPTS -XX:+UseCMSInitiatingOccupancyOnly -Djava.awt.headless=true"
export JAVA_OPTS="$JAVA_OPTS -XX:+UseGCOverheadLimit -XX:AllocatePrefetchDistance=256 -XX:AllocatePrefetchStyle=1"
export JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:MaxGCPauseMillis=200"

server.xml
maxThreads="3000" :tomcat起动的最大线程数，即同时处理的任务个数，默认值为200