Re: [SM-DEVEL] Large folders are slow

[Jason M. <ja...@st...>]

Hello,
    I have been checking the speed of my production server running SM
1.2.5/courier 1.4.2 with maildir mailboxes. With 50 to 70 people logged in I can
bring up a folder with 2400+ messages inside of 2 seconds. The delay is barely
longer than opening a folder with 20 messages.
     The IMAP server lives on the same machine as SM and authentication is done
via LDAP on the same server as well.
    We do run some pretty hefty hardware however, dual P3's at 933, 640M RAM,
Raid 5. w/Red Hat 7.1 and a custom 2.4.8 kernel. This machine handles all our
web and mail traffic and runs quite a few services.
    I know SM makes a lot of IMAP calls, seemingly too many, but I can't
complain about performance on my setup.

just my 02

btw Michael thanks for code on the timing functions, very interesting.

Jason Munro
AOL/Yahoo IM: jmunr0
Network Administrator
Standard Beverage IT department

-------- Original Message --------
Subject: Re: [SM-DEVEL] Large folders are slow
From: Michael Douma <dou...@mi...>
Date: Mon, February 25, 2002 11:05 am
To: "Stefan Sels" <st...@se...>

> There is numerous slowness in SM that appears to happen because of  header
processing, not just communicating with the server. If you are  listing 1.5k
messages, I don't doubt that the IMAP server is part of the bottleneck, but it
is not the only part. (Plus, your machine might be faster.)
>
> Michael
>
> ----------
>
> On Monday, February 25, 2002, at 08:02 AM, Stefan Sels wrote:
>
>> Hi,
>>
>> i can list 1500 messages with Squirrelmail without problems.
>> The speed is primary dependend on your imap mailserver.
>> If you use an mbox based mailserver thats the reason for the
>> delay/timeout,
>> because it reads all messages and filters out the subject (mbox saves  all
messages in a single file).
>> If you need an fast imap server that handles big mailboxes I would suggest
>> you to use Courier IMAP. It uses the MailDir format for messages, so it
stores message headers and body in a seperate file (one file for each message
header/body).
>>
>> Regards,
>>    Stefan Sels
>>
>> <quote who="Michael Douma">
>>> Congratulations guys on getting 1.2.5 out!
>>>
>>> I am interested in improving performance, particularly with large folders.
Over 200-300 messages take several seconds to load (just to display 15 email
titles), and over 1-2k messages times out the server. Is there one primary
bottleneck?
>>>
>>> Michael
>>>
>>>
>>> --
>>> squirrelmail-devel mailing list
>>> List Address: squ...@li...
>>> List Info:
>>> https://lists.sourceforge.net/lists/listinfo/squirrelmail-devel
http://squirrelmail.org/cvs
>>
>>
>> MfG / regards
>>
>>    Stefan Sels
>> ---
>> GPG/PGP key http://stefan.sels.com/pgp.asc
>>
>
>
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