dovecot - Sep 2007 - Moving email from a folder to another using IMAP is very slow (sometimes)

Hi to all,

I am using the new beta release 1.1.

I am experiencing, after the upgrade to the 1.1beta some problems regarding 
the following scenario:

I am conneted with Outlook to dovecot server using IMAP. I have many folders 
and I want to move an email from a folder to another using drag and drop. I 
see that when I move the email, the IMAP process goes to 90-95% for about 5 
seconds and after, the mail is finally moved. I noticed that this operation 
sometimes (20% about) is again fast. There is no problem of overload of the 
server because this mail server, at the moment, manage just 1 email address.

Before the upgrade to 1.1beta, this operation was very very fast.

Is there a way to try to debug the IMAP process for understanding what is 
happening?

Thank you for your help.
Stefano.

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
Sep 26 10:56:40 sirio3 dovecot: IMAP(<email_address>): Raw backtrace: imap
[0x479efc] -> imap [0x4797fc] -> imap [0x48188f] -> imap [0x449f03]
-> imap
[0x44a247] -> imap(index_storage_search_init+0x139) [0x44a559] -> 
imap(cmd_store+0x1bc) [0x418dcc] -> imap(cmd_uid+0x52) [0x419312] -> imap 
[0x41a1a2] -> imap [0x41a16c] -> imap(client_input+0x188) [0x41a438] ->
imap(io_loop_handler_run+0x139) [0x47fa29] -> imap(io_loop_run+0x28) 
[0x47ee88] -> imap(main+0x3f2) [0x4211c2] -> 
/lib64/tls/libc.so.6(__libc_start_main+0xdb) [0x3bef51c4bb] -> imap 
[0x41476a]
Sep 26 10:56:40 sirio3 dovecot: child 3666 (imap) killed with signal 6

Any help?
Thank you,
Stefano.

----- Original Message ----- 
From: "Stefano Scalise" <s.scalise at tno.it>
To: <dovecot at dovecot.org>
Sent: Wednesday, September 26, 2007 12:00 PM
Subject: Moving email from a folder to another using IMAP is very slow 
(sometimes)

> Hi to all,
>
> I am using the new beta release 1.1.
>
> I am experiencing, after the upgrade to the 1.1beta some problems 
> regarding the following scenario:
>
> I am conneted with Outlook to dovecot server using IMAP. I have many 
> folders and I want to move an email from a folder to another using drag 
> and drop. I see that when I move the email, the IMAP process goes to 
> 90-95% for about 5 seconds and after, the mail is finally moved. I noticed 
> that this operation sometimes (20% about) is again fast. There is no 
> problem of overload of the server because this mail server, at the moment, 
> manage just 1 email address.
>
> Before the upgrade to 1.1beta, this operation was very very fast.
>
> Is there a way to try to debug the IMAP process for understanding what is 
> happening?
>
> Thank you for your help.
> Stefano.