imapsync very poor performance

[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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>> https://lists.kolab.org/mailman/listinfo/users
> 
> 
> 
> 
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