dovecot - Oct 2007 - Moving email from a folder to another using IMAP isvery slow (sometimes)

Hi to all,

very strange! I tried to debug why imap process takes 100% CPu and it is 
very slow when I move an email from an imap folder to another imap folder 
and then I typed:

strace -tt -o /log-imap.txt -p <process number>

well, during the trace the imap process doesn't crash and it is very fast. 
If I stop the tracing, I have again the problem and sometimes the crash of 
the process.

Any help?
Thank you,
Stefano.

----- Original Message ----- 
From: "Stefano Scalise" <s.scalise at tno.it>
To: "Timo Sirainen" <tss at iki.fi>
Cc: <dovecot at dovecot.org>
Sent: Monday, October 01, 2007 4:21 PM
Subject: Re: [Dovecot] Moving email from a folder to another using IMAP 
isvery slow (sometimes)

> Sorry, but with the new version (1.1.beta2), I still have the same problem 
> of very slowness during moving email between two imap folders. What can I 
> do for debugging it?
> Stefano.
>
> ----- Original Message ----- 
> From: "Timo Sirainen" <tss at iki.fi>
> To: "Stefano Scalise" <s.scalise at tno.it>
> Cc: <dovecot at dovecot.org>
> Sent: Sunday, September 30, 2007 1:52 PM
> Subject: Re: [Dovecot] Moving email from a folder to another using IMAP 
> isvery slow (sometimes)
>
> On Wed, 2007-09-26 at 12:05 +0200, Stefano Scalise wrote:
>> Update to the problem:
>>
>> I tried to stress the server with many moving and I received:
>>
>> Sep 26 10:56:40 sirio3 dovecot: IMAP(<email_address>): Trying to
allocate
>> 0
>> bytes
>
> This should fix it: http://hg.dovecot.org/dovecot/rev/c6b85cf1e63a
>
> I'll probably make a beta2 release today after fixing several other
> things.
>
>

Hi to all,

I can confirm that if I downgrade to 1.0.5 version I have no more the
slowness problem. Then I think it is a bug introduced in th 1.1.x releases.
Stefano.

----- Original Message ----- 
From: "Stefano Scalise" <s.scalise at tno.it>
To: "Stefano Scalise" <s.scalise at tno.it>; "Timo
Sirainen" <tss at iki.fi>
Cc: <dovecot at dovecot.org>
Sent: Tuesday, October 02, 2007 12:04 PM
Subject: Re: [Dovecot] Moving email from a folder to another using IMAP
isvery slow (sometimes)

> Hi to all,
>
> very strange! I tried to debug why imap process takes 100% CPu and it is
> very slow when I move an email from an imap folder to another imap folder
> and then I typed:
>
> strace -tt -o /log-imap.txt -p <process number>
>
> well, during the trace the imap process doesn't crash and it is very
fast.
> If I stop the tracing, I have again the problem and sometimes the crash of
> the process.
>
> Any help?
> Thank you,
> Stefano.
>
> ----- Original Message ----- 
> From: "Stefano Scalise" <s.scalise at tno.it>
> To: "Timo Sirainen" <tss at iki.fi>
> Cc: <dovecot at dovecot.org>
> Sent: Monday, October 01, 2007 4:21 PM
> Subject: Re: [Dovecot] Moving email from a folder to another using IMAP
> isvery slow (sometimes)
>
>
>> Sorry, but with the new version (1.1.beta2), I still have the same
>> problem of very slowness during moving email between two imap folders.
>> What can I do for debugging it?
>> Stefano.
>>
>> ----- Original Message ----- 
>> From: "Timo Sirainen" <tss at iki.fi>
>> To: "Stefano Scalise" <s.scalise at tno.it>
>> Cc: <dovecot at dovecot.org>
>> Sent: Sunday, September 30, 2007 1:52 PM
>> Subject: Re: [Dovecot] Moving email from a folder to another using IMAP
>> isvery slow (sometimes)
>>
>> On Wed, 2007-09-26 at 12:05 +0200, Stefano Scalise wrote:
>>> Update to the problem:
>>>
>>> I tried to stress the server with many moving and I received:
>>>
>>> Sep 26 10:56:40 sirio3 dovecot: IMAP(<email_address>): Trying
to
>>> allocate 0
>>> bytes
>>
>> This should fix it: http://hg.dovecot.org/dovecot/rev/c6b85cf1e63a
>>
>> I'll probably make a beta2 release today after fixing several other
>> things.
>>
>>
>