Users experiencing poor performance and timeouts

[Panoptic]

Hello there. I'm new to Zimbra (and Linux, coincidentally), and have run into some difficulty figuring out some issues users are experiencing with Outlook hanging and returning timeout errors. We're currently running "Release 4.5.11_GA_1751.FC5_20080128130403 FC5 FOSS edition" on a Fedora Core 5 system.

I've restarted Zimbra and things didn't change. The server is a Pentium D (not sure on clock speed, but two cores) with 8 GB of memory. Here's the output for top:

top - 08:45:36 up 121 days, 23:47,  1 user,  load average: 3.77, 5.40, 5.35
Tasks: 163 total,   1 running, 162 sleeping,   0 stopped,   0 zombie
Cpu(s): 14.5%us,  0.7%sy,  0.0%ni, 56.3%id, 28.6%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   8312280k total,  7833996k used,   478284k free,   153588k buffers
Swap:  1036164k total,      132k used,  1036032k free,  5532352k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
22481 zimbra    18   0 63240  52m 3168 S   28  0.6   0:02.95 amavisd
 1716 named     23   0 56956  11m 2100 S    1  0.1 101:49.52 named
25096 zimbra    16   0  2292 1056  784 R    0  0.0   0:00.12 top
    1 root      16   0  2012  684  588 S    0  0.0   0:04.42 init
    2 root      RT   0     0    0    0 S    0  0.0   0:28.41 migration/0
    3 root      34  19     0    0    0 S    0  0.0   0:01.97 ksoftirqd/0
    4 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/0
    5 root      RT   0     0    0    0 S    0  0.0   0:27.68 migration/1
    6 root      34  19     0    0    0 S    0  0.0   0:02.95 ksoftirqd/1
    7 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/1
    8 root      10  -5     0    0    0 S    0  0.0   0:00.02 events/0
    9 root      10  -5     0    0    0 S    0  0.0   0:00.00 events/1
   10 root      10  -5     0    0    0 S    0  0.0   0:00.00 khelper
   11 root      10  -5     0    0    0 S    0  0.0   0:00.00 kthread
   14 root      10  -5     0    0    0 S    0  0.0   0:24.88 kblockd/0
   15 root      10  -5     0    0    0 S    0  0.0   3:22.33 kblockd/1
   16 root      14  -5     0    0    0 S    0  0.0   0:00.00 kacpid
  121 root      10  -5     0    0    0 S    0  0.0   0:00.00 khubd
  123 root      10  -5     0    0    0 S    0  0.0   0:00.02 kseriod
  187 root      15   0     0    0    0 S    0  0.0   7:54.46 pdflush
  188 root      15   0     0    0    0 S    0  0.0   8:13.56 pdflush
  189 root      15   0     0    0    0 S    0  0.0  17:09.12 kswapd0
  190 root      13  -5     0    0    0 S    0  0.0   0:00.00 aio/0
  191 root      13  -5     0    0    0 S    0  0.0   0:00.00 aio/1
  348 root      11  -5     0    0    0 S    0  0.0   0:00.00 kpsmoused
  371 root      10  -5     0    0    0 S    0  0.0   0:00.08 ata/0
  372 root      10  -5     0    0    0 S    0  0.0   0:00.91 ata/1
  378 root      15  -5     0    0    0 S    0  0.0   0:00.00 scsi_eh_0
  379 root      15  -5     0    0    0 S    0  0.0   0:00.00 scsi_eh_1
  422 root      10  -5     0    0    0 S    0  0.0 227:48.68 md1_raid5
  426 root      10  -5     0    0    0 D    0  0.0 130:02.87 kjournald
  469 root      11  -5     0    0    0 S    0  0.0   0:00.00 kauditd
  494 root      14  -4  2096  612  388 S    0  0.0   0:00.26 udevd
 1357 root      10  -5     0    0    0 S    0  0.0   0:00.02 md0_raid1
 1375 root      20  -5     0    0    0 S    0  0.0   0:00.00 kmirrord
 1396 root      11  -5     0    0    0 S    0  0.0   0:00.00 kjournald
 1685 root      15   0  1896  936  532 S    0  0.0  17:41.63 syslogd
 1689 root      15   0  1600  412  348 S    0  0.0   0:00.00 klogd
 1698 root      16   0  2176  356  272 S    0  0.0   0:00.61 irqbalance

Any help regarding this matter is highly appreciated.

[uxbod]

Welcome to the forums

On that version of Zimbra you should really be planning an upgrade and have a read through ClamAV 0.94 EOL on ZCS 5.0.16 prior (discussion) as you are probably hitting it.

[GordonF]

My server gets rebooted every night for the same reason and its a bigger spec. After 5 or 6 days it becomes really slow and the timeouts start and even IMAP/POP starts having issues. I put a reboot script in the cron. On my 'old test' server we had some hard drive issues which also caused amavis to go ballistic as its quite hdd intensive as well. Took us a while to figure that one out. Amavis did the same to Maia on a clients server which we discovered quickly as we had only just discovered our own servers issue. (Said client also a Zimbra user now seeing we had to redo the whole server anyway )

[Panoptic]

Updated clamav and CPU and IO wait seem to be down. I'll wait to see how many users complain tomorrow before I call it.

Thanks for the replies so far.

[Panoptic]

Still having problems, but today while working on someone's system I noticed they (incorrectly) had "require Secure Password Authentication" on in Outlook. Apparently a number of users are configured this way. Could this be causing problems?

[Panoptic]

[edit] Got it figured out. Thanks.