100% CPU usage by java in Release 7.1.3_GA_3346.RHEL5_64_20110928134520 CentOS5_64 FO

[sadiq007]

My server going hang again and again.
and come to know that bellow process using more than 90% CPU frequently.
/opt/zimbra/java/bin/java -Dfile.encoding=UTF-8 -server -Djava.awt.headless=true -Dsun.net.inetaddr.ttl=60

top output
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
15125 zimbra 18 0 2637m 2.2g 17m S 92.2 29.8 168:10.31 /opt/zimbra/java/bin/java -Dfile.encoding=UTF-8 -server -Djava.awt.headless=true -Dsun.net.inetaddr.ttl=60 -XX:+UseC
4476 zimbra 15 0 2016m 557m 5616 S 12.2 7.3 35:53.34 /opt/zimbra/mysql/libexec/mysqld --defaults-file=/opt/zimbra/conf/my.cnf --basedir=/opt/zimbra/mysql --datadir=/opt/z
3163 zimbra 18 0 868m 508m 12m S 10.3 6.7 17:26.83 /opt/zimbra/java/bin/java -XX:ErrorFile=/opt/zimbra/log -client -Xmx256m -Dzimbra.home=/opt/zimbra -Djava.library.pat
24087 zimbra 15 0 213m 108m 3968 S 9.3 1.4 0:07.58 amavisd (ch17-avail)
24088 zimbra 16 0 211m 107m 3952 S 7.6 1.4 0:05.75 amavisd (ch17-avail)

[Labsy]

Mine was too, but with ZCS 7.1.2. Each time I found it beeing so high, I just rebooted and problem went away for few days.
After upgrade to 7.1.4 I have it running smooth for few days now.

could not tell what was the diagnose...not even what's the cure. Just my experience.

[sadiq007]

r u getting now such cpu high usage problem with 7.1.4? or its still on observation?

[Labsy]

Actually, my ZCS have never had huge problems with constant high CPU usage. I only had problems with 1-5 minute lasting CPU spikes, which I did not diagnose.

ZCS 7.1.4 seems lowering average CPU usage for few percents, but hey, it's only my opinion, not a measurement.

If you are on VIRTUAL platform, then I might have some advice on performance...otherwise njet.

[sadiq007]

yes my server is on VIRTUAL platform, so what you are advising for performance?