imapsync very poor performance

[Christian Hügel]

Thank you for your reply. resolv.conf looks fine. Also starting dovecot
in the foreground doesn't reveal any errors. I'm stucked.

Christian

Am 02.12.2013 19:36, schrieb Franz Skale:
> 
> 
> 
> Start dovecot in the foreground using option -F
> enable full debugging. (Dovecot.conf).
> Or start dovecot unsing strace.
> These are standard debugging options you can try.
> ALso check your DNS setup. (resolv.conf)
> Do you use dovecot indexes ?
> 
> 
> Rgds.
> 
> Franz
> 
> 
> Am 02.12.13 19:27, schrieb Christian Hügel:
>> This has to do with Centos 6.5. There is no issue with Centos 6.4; I've
>> just setup up a VM. The question is which files causes this issue.
>>
>> Christian
>>
>> Am 02.12.2013 17:07, schrieb Franz Skale:
>>>
>>>
>>> Check for hanging threads.
>>> Also check ,that your sysctl.conf maxfilenr is big enough.
>>> Change your init script accordingly. (ulimit -n 4096 before the start
>>> option)
>>>
>>> Check sysctl.conf:
>>> fs.inotify.max_user_instances = 4096
>>> fs.file-max = 2000000
>>>
>>> do: sysctl -p after changing the sysctl.conf
>>>
>>> Check the dovecot error log. /var/log/dovecot-error.log (on debian systems)
>>>
>>>
>>> Rgds
>>>
>>>
>>> Franz
>>>
>>>
>>>
>>>
>>> Am 02.12.13 17:01, schrieb Christian Hügel:
>>>> Hi Franz,
>>>>
>>>> with those options dovecot specially.
>>>>
>>>>> login_max_processes_count = 1024
>>>>> login_max_connections = 2048
>>>> the dovecot server hangs and isn´t accessible anymore.
>>>>
>>>>
>>>> Christian
>>>>
>>>> Am 02-12-2013 16:47, schrieb Franz Skale:
>>>>> Check your dovecot settings.
>>>>> Also, the the dovecot error log.
>>>>> Typical settings of a busy host:
>>>>>
>>>>> mail_max_userip_connections = 100
>>>>> login_max_processes_count = 1024
>>>>> login_max_connections = 2048
>>>>> In the init script use ulimit -n 4096
>>>>>
>>>>> Then try again.
>>>>>
>>>>> Rgds.
>>>>>
>>>>> Franz
>>>>>
>>>>>
>>>>>
>>>>> Am 02.12.13 15:41, schrieb Christian Hügel:
>>>>>> i,
>>>>>>
>>>>>> I´m running imapsync-1.569-1.el6.noarch on a Centos 6.5 x64 system
>>>>>> with 8GB RAM and a dual 3Ghz AMD cpu. The sync runs on the "target
>>>>>> server and the source server is a dovecot 1.2.1
>>>>>> Here are some stats:
>>>>>>
>>>>>> 0.01 msgs/s 63.780 KiB/s ETA: Mon Dec 2 22:31:21 2013 28528 s 328 msgs
>>>>>> left
>>>>>> 0.01 msgs/s 65.135 KiB/s ETA: Tue Dec 3 01:17:36 2013 38356 s 327 msgs
>>>>>> left
>>>>>> 0.01 msgs/s 65.076 KiB/s ETA: Mon Dec 2 21:44:20 2013 25560 s 326 msgs
>>>>>> left
>>>>>> 0.01 msgs/s 65.238 KiB/s ETA: Mon Dec 2 23:08:44 2013 30484 s 325 msgs
>>>>>> left
>>>>>> 0.01 msgs/s 65.181 KiB/s ETA: Mon Dec 2 21:26:25 2013 24344 s 324 msgs
>>>>>> left
>>>>>> 0.02 msgs/s 65.122 KiB/s ETA: Mon Dec 2 20:18:12 2013 20251 s 323 msgs
>>>>>> left
>>>>>> 0.02 msgs/s 65.235 KiB/s ETA: Mon Dec 2 19:46:36 2013 18332 s 322 msgs
>>>>>> left
>>>>>>
>>>>>> and the cpu is during the sync at 100% The size of the mails are
>>>>>> normal no attachments so I realy don´t know where´s the issue here.
>>>>>> The size of the mailbox is only 300MB but I have a couple of huge
>>>>>> mailboxes (>17GB). With this speed it´s quite impossible to migrate my
>>>>>> mailboxes to the new kolab 3.1 server
>>>>>>
>>>>>> Can you please help me out with this issue? Thank you
>>>>>>
>>>>>> Christian
>>>> _______________________________________________
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>>>> users at lists.kolab.org
>>>> https://lists.kolab.org/mailman/listinfo/users
>>>
>>>
>>>
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>>>
>>
>>
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> 
> 
> 
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