Good morning, my server's CPU consumes too many resources and makes access to Web Mail is too slow, I checked the server processes and the process that consumes too many resources is the jetty.

top - 09:25:07 up 21 days, 23:03, 1 user, load average: 15.17, 15.14, 15.32
Tasks: 208 total, 6 running, 200 sleeping, 0 stopped, 2 zombie
Cpu(s): 98.2%us, 0.6%sy, 0.1%ni, 0.7%id, 0.2%wa, 0.1%hi, 0.2%si, 0.0%st
Mem: 18484132k total, 12353064k used, 6131068k free, 133328k buffers
Swap: 4194296k total, 136k used, 4194160k free, 1425020k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
11619 zimbra 18 0 7981m 7.5g 15m S 379.2 42.6 35582:58 java
19947 zimbra 25 0 55672 9356 2388 R 14.6 0.1 26:10.37 zmlogger
8451 zimbra 15 0 2156m 1.9g 5004 S 1.0 10.6 99:20.92 mysqld
3781 root 11 -5 0 0 0 S 0.7 0.0 32:24.11 kjournald
29434 root 15 0 12740 1148 800 R 0.7 0.0 0:00.02 top
388 root 15 0 0 0 0 S 0.3 0.0 4:17.70 pdflush
2990 dbus 16 0 21504 1184 716 S 0.3 0.0 0:09.16 dbus-daemon
3394 root 35 19 253m 18m 2192 S 0.3 0.1 0:54.46 yum-updatesd
6592 zimbra 18 0 434m 95m 22m S 0.3 0.5 35:03.18 slapd

The process 11619 is a java process

[root@zcs1 etc]# ps -ef |grep 11619
zimbra 11619 11618 99 Jun13 ? 24-17:06:16 /opt/zimbra/java/bin/java -server -XX:NewRatio=2 -Djava.awt.headless=true -XX:MaxPermSize=128m -XX:SoftRefLRUPolicyMSPerMB=1 -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCApplicationStoppedTime -XX:+UseConcMarkSweepGC -XX:PermSize=128m -Xss256k -Xms7220m -Xmx7220m -Xmn1805m -Djava.io.tmpdir=/opt/zimbra/mailboxd/work -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/jetty.properties /opt/zimbra/mailboxd/etc/jetty-setuid.xml /opt/zimbra/mailboxd/etc/jetty.xml
root 29649 16288 0 09:26 pts/0 00:00:00 grep 11619