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  1. #1
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    Default Performance Issues

    We seem to have intermittent connectivity issues client to server. Progress bars will just show connecting and just not do anything, sometimes it will eventually throw up and error that "the server can't be reached at this time".
    I can contact the server through ssh and remote desktop with no problem. Memory seems not to be an issue, nor processors; they seem to be at a reasonable state. The logs are either no help, or I am not looking for the right things.

    Can anyone give me some direction on where to look and what to look for?

    750 users
    Version 4.5.6_GA_1044.MACOSXx86 Jul 6, 2007
    OS X 10.4.10
    2 x 2 GHZ Dual Core Intel Xeon, 6 GB RAM

  2. #2
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    Hey dketchum,
    -zimbra related logfiles: /docs/ne/latest/administration_guide/9_Monitoring.12.1.html#1075561
    feel free to attach your logs if you'd like (/opt/zimbra/log/mailbox.log & /var/log/zimbra.log being the biggies)
    -your system logfiles
    -you also might want to analyze some tcpdumps
    -as you're an NE customer you could also open a support request if you'd like someone to take a look
    (of course there's also 4.5.9 you can upgrade too, but that's an asside)
    Last edited by mmorse; 11-09-2007 at 03:18 PM.

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    mmorse,
    Thank you for your quick reply.
    If we don't see something from these logs, I will open a service request. I did not see mailbox.log in /opt/zimbra/, there is a mail.log? in /var/log/ is that the same? The logs are both well beyond the file size attachment suggestions, will that be a problem? The zimbra.log is 22 MB and the mail.log is 65 MB

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    meant to say /log and not /logs
    so it's /opt/zimbra/log/mailbox.log

    Certainly crop portions and attach them in a zip as needed.
    Of course you can host them somewhere on your own or another free location. (the yousendit's etc)
    There's also zimbra private pastebin - collaborative debugging tool if needed.

    -If you end up contacting support for it there will be ways of getting them the logs.
    But you can certainly ask us, aka: 'the free forum support' as well!
    Last edited by mmorse; 11-09-2007 at 01:35 PM.

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    Ah, I see where I went wrong with the log location.

    We did find a warn in the log. Is it relevant?

    mailbox.log.2007-11-08:2007-11-08 13:59:59,107 WARN [LmtpServer-16]
    [name=emailuser@ourdomain,org;] dbconn - Connection pool is 75%
    utilized. 12 connections out of a maximum of 12 in use. Turn on
    debug logging for zimbra.dbconn to see stack traces of connections not
    returned to the pool.

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    could you attach your output of:
    su zimbra
    postconf
    &
    zmlocalconfig
    &
    zmprov gs server.domain.com (zmprov gacf is a little less accurate if you've changed your settings in the individual server vs globally)
    Last edited by mmorse; 11-09-2007 at 07:51 PM.

  7. #7
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    Quote Originally Posted by dketchum View Post
    mailbox.log.2007-11-08:2007-11-08 13:59:59,107 WARN [LmtpServer-16] [name=emailuser@ourdomain,org;]
    dbconn - Connection pool is 75% utilized.
    12 connections out of a maximum of 12 in use.
    Turn on debug logging for zimbra.dbconn to see stack traces of connections not returned to the pool.
    My best guess is that your database connections can't keep up with the load or something.
    12 out of 12 is not 75% -But I think it's just that the warning crops up at 75%

    So if you wanted to track it down-
    edit: /opt/zimbra/conf/log4j.properties
    and add: log4j.logger.zimbra.dbconn=DEBUG

    But why don't you make a good backup and upgrade to 4.5.9 because there have been a lot of performance improvements.

    As you on NE:
    -First use zmbackup (the backups your currently used to)
    -Though I know you can restore from the backups, if you can afford the extra few min of downtime it often helps to have the structure easily accessible:

    Obviously backup any other mounted locations that you use, the below is just assuming everything's stored in /opt/zimbra/
    su zimbra
    zmcontrol stop
    exit/switch back to root
    ps aux | grep zimbra (kill -9 pid on any remaining)
    mkdir /backup
    rsync -avHK /opt/zimbra/ /backup/zimbra

    When that finishes, if you want you can tar it up as well for 'easy' movement to another location:
    mkdir /backuptar
    tar -zcvf /backuptar/zimbra.456_1044.200711##.backup.gz -C /backup/zimbra .
    Last edited by mmorse; 11-09-2007 at 08:55 PM.

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    Yup, hopefully upgrading some night at 2am & practically no one should notice

    As far as I can tell, the problem with the debug is that you can't see the current 'connections not returned to the pool'. Just anything new that happens from the point of enabling debugging...if someone has a way around that particular caveat, by all means let me know!
    It also used to dump a looot of data to the logs, but the output has since been pruned a bit.
    Quote Originally Posted by dketchum View Post
    750 users
    Version 4.5.6_GA_1044.MACOSXx86 Jul 6, 2007
    OS X 10.4.10
    2 x 2 GHZ Dual Core Intel Xeon, 6 GB RAM
    So is that a 2 box setup OR 1 box dual cpu, dual core?
    Last edited by mmorse; 11-13-2007 at 08:23 PM.

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    That would be one server, 2 dual core processors.

    Meh. 2 AM? school district, 30 mile commute if something goes wrong... Maybe a weekend or an upcoming holiday weekend.

    What is the timetable for the 4.5.10? I'd rather not do another upgrade in 10 days.

  10. #10
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    Quote Originally Posted by dketchum View Post
    That What is the timetable for the 4.5.10? I'd rather not do another upgrade in 10 days.
    Sry, the date for that kinda got left out of PMWeb. My word is by no means official, but it was originally tentatively scheduled for this week (thursday 15th).
    Quote Originally Posted by dketchum View Post
    That would be one server, 2 dual core processors.
    If you had said 2 boxes I was gonna suggest playing with one or two things that are usually only changed on larger installs...
    Code:
    zmlocalconfig -e zimbra_mysql_connector_maxActive=12
    /opt/zimbra/conf/my.cnf which is computed from zmmycnf
    You can give it a wirl I guess, try 13 and see if you get a '13 of 13' error.
    Quote Originally Posted by dketchum View Post
    That Meh. 2 AM? school district, 30 mile commute if something goes wrong... Maybe a weekend or an upcoming holiday weekend.
    I know the feeling...but there's been so many enhancements to tomcat/ldap/everything else in/since 4.5.7 that I know support will just have you get on 4.5.9 first anyway

    Hopefully a one hour window of remote work will give you 30min to upgrade (used to larger multi-server installs - most of your time will be the hearty backup of /opt/zimbra) and 30min to falback if needed.

    You can certainly open that support ticket for them to take a look at it 'as is'; but they could spend all day correcting 'connectivity issues' and things that have long since addressed by the engineers.
    -Just a free 2cents worth of advice to save you time and $ -as we all know that doesn't come easy in edu!
    Last edited by mmorse; 11-13-2007 at 08:28 PM. Reason: go up by 1 on the connections and see what happens

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