记录Tomcat 的coredump

#!/bin/bash

if [ $# -lt 1 ]; then

   echo "tomcat instance ID is required, e.g 01 02"

   echo "USAGE: $0 instanceID"

   exit 1

fi

host=`hostname`

for id in $@

do

  $jid =>process ID( PID)

  echo "saving jstack to tomcat instance ${jid} "

  jstack -l ${jid} > /home/zapp/apps/${id}/logs/jstack-$host.${id}-`date +%Y%m%d%H%M`.log

  echo "saving jmap to tomcat instance ${jid}.... "

  jmap -dump:live,format=b,file=/home/zapp/apps/${id}/logs/jmap-$host.${id}-`date +%Y%m%d%H%M`.bin $jid

done

debug java的异常的时候用。类似C的coredump.

多说一句，Java的优化还涉及到GC回收设置，这个非常的复杂。性能监控方面有Jvm/jconsole/jmx和jolokia等。