Dear All,

just curious is this behavior normal?
this is a multi-core server (total 16-core), and sometimes we found the java process (jetty) runs up to 250% CPU% in "top" listing, just like below :

top - 16:03:58 up 81 days,  3:52,  4 users,  load average: 1.78, 2.73, 3.56
Tasks: 326 total,   1 running, 325 sleeping,   0 stopped,   0 zombie
Cpu(s): 13.0%us,  1.1%sy,  0.0%ni, 85.8%id,  0.0%wa,  0.0%hi,  0.2%si,  0.0%st
Mem:  12296764k total, 11419060k used,   877704k free,   383992k buffers
Swap: 25165812k total,      312k used, 25165500k free,  3701628k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND            
 6228 zimbra    15   0 5976m 5.2g  16m S 222.5 44.7  18852:56 java

the java process is for jetty server :
zimbra    6228  6227 17 Jan28 ?        13-02:15:32 /opt/zimbra/java/bin/java -server -Djava.awt.headless=true -XX:+UseConcMarkSweepGC -XX:NewRatio=2 -XX:PermSize=128m -XX:MaxPermSize=128m -XX:SoftRefLRUPolicyMSPerMB=1 -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCApplicationStoppedTime -Xss256k -Xms4803m -Xmx4803m -Xmn1200m -Djava.library.path=/opt/zimbra/lib -Djava.endorsed.dirs=/opt/zimbra/mailboxd/common/endorsed -Dzimbra.config=/opt/zimbra/conf/localconfig.xml -Djetty.home=/opt/zimbra/mailboxd -DSTART=/opt/zimbra/mailboxd/etc/start.config -jar /opt/zimbra/mailboxd/start.jar /opt/zimbra/mailboxd/etc/ /opt/zimbra/mailboxd/etc/jetty-setuid.xml /opt/zimbra/mailboxd/etc/jetty.xml
I think it just means that this process almost consume almost 3 CPU cores for job processing, and we still have lots of space (total 16-core) for other processes. is my understanding correct?

any advice? Thanks.