CPU Utilization issues

[mcesari]

also check free space. we have had problem with amavis running out of free tmp space.

[bolderbast]

Hi,

I believe I might be experiencing similar problems and though this thread has gone quiet for some time now, I thought it would be better to continue an existing thread instead of starting a new one.

Anyway, about one time per day (sometimes twice) I see a process taking up all CPU time. It seems to ba a java process related to clamscanner. The server (and Web GUI) performance suffers, but is not unacceptable. Killing the process (kill -9 PID) makes everything get back to normal. If I don't kill the process, after a while I will have two of these processes (each taking almost 50% CPU).

I would like to resolve this, but I have no idea where to start troubleshooting. Can anyone help me on this?

Some info:

top - 08:31:01 up 5 days, 21:34,  1 user,  load average: 1.79, 1.69, 1.54
Tasks: 119 total,   2 running, 116 sleeping,   0 stopped,   1 zombie
Cpu(s): 98.7%us,  1.3%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   2062220k total,  1828612k used,   233608k free,   175996k buffers
Swap:   979956k total,   546508k used,   433448k free,   237008k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND            
26321 zimbra    20   0  504m  23m  10m S 97.3  1.2   2965:57 java               
11774 zimbra    20   0 38312 4928 1796 S  0.7  0.2   7:47.62 zmstat-allprocs    
 8687 zimbra    20   0 1283m 575m 9896 S  0.3 28.6  46:08.17 java               
11760 zimbra    20   0 35556 3740 1844 S  0.3  0.2   2:09.57 zmstat-proc        
20753 zimbra    20   0 18860 1260  932 R  0.3  0.1   0:00.02 top                
    1 root      20   0  4020  604  528 S  0.0  0.0   0:00.77 init               
    2 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kthreadd           
    3 root      RT  -5     0    0    0 S  0.0  0.0   0:00.00 migration/0        
    4 root      15  -5     0    0    0 S  0.0  0.0   0:03.42 ksoftirqd/0        
    5 root      RT  -5     0    0    0 S  0.0  0.0   0:00.19 watchdog/0         
    6 root      15  -5     0    0    0 S  0.0  0.0   0:04.28 events/0           
    7 root      15  -5     0    0    0 S  0.0  0.0   0:00.01 khelper            
   39 root      15  -5     0    0    0 S  0.0  0.0   0:16.82 kblockd/0          
   42 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kacpid             
   43 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kacpi_notify       
   96 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kseriod            
  138 root      20   0     0    0    0 S  0.0  0.0   0:03.81 pdflush

Running "ps -ef |grep 26321" gives me the following output:

zimbra   26321 26320 91 Dec04 ?        2-01:32:46 /opt/zimbra/java/bin/java -XX:ErrorFile=/opt/zimbra/log -client -Xmx256m -Dzimbra.home=/opt/zimbra -Djava.library.path=/opt/zimbra/lib -Djava.ext.dirs=/opt/zimbra/java/jre/lib/ext:/opt/zimbra/lib/jars:/opt/zimbra/lib/ext-common:/opt/zimbra/lib/ext/clamscanner com.zimbra.cs.account.ProvUtil -l gs hostname.domainname.net

Output of "df -h":

Filesystem                              Size  Used Avail Use% Mounted on
/dev/mapper/katrien-root                5.0G  1.1G  3.7G  22% /
varrun                                 1007M   64K 1007M   1% /var/run
varlock                                1007M     0 1007M   0% /var/lock
udev                                   1007M   68K 1007M   1% /dev
devshm                                 1007M     0 1007M   0% /dev/shm
/dev/sda1                               177M   39M  129M  24% /boot
/dev/mapper/katrien-var                 1.9G  387M  1.4G  22% /var
/dev/mapper/zimbra-opt--zimbra           10G  2.7G  6.8G  29% /opt/zimbra
/dev/mapper/zimbra-opt--zimbra--store    10G  3.2G  6.3G  34% /opt/zimbra/store

Host Specs:
- 1x AMD Phenom X4 2,4GHz
- 4x 2GB DDR2 RAM
- 5x 2TB SATA Disk, in Linux Software RAID5
- Ubuntu Server 9.10 AMD64

VM (KVM/QEMU) Specs:
- 1 Virtual Processor
- 2GB RAM
- 5GB Virtual disk for OS (RAW, Pre-allocated)
- 10GB Virtual disk for Zimbra software and logs (RAW, Pre-allocated)
- 10GB Virtual disk for Zimbra store (RAW, Pre-allocated)
- Ubuntu Server 8.04AMD64

The Zimbra environment:
- Running on a single server
- 5 users
- approx. 3GB of total mail

Output of "zmcontrol status":

Host hostname.domainname.net
	antispam                Running
	antivirus               Running
	imapproxy               Running
	ldap                    Running
	logger                  Running
	mailbox                 Running
	memcached               Running
	mta                     Running
	spell                   Running
	stats                   Running

[ArcaneMagus]

That appears to just be a script running `zmprov -l gs hostname.domainname.net`
What happens if you run this manually?