imapsync very poor performance

[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