Hi Tomas,
You give some sort times for several IMAP servers, do you happen to have sort
times for Dovecot??
Redards,
-Rich
On Fri, October 3, 2008 05:34, Tomas Kuliavas wrote:
>
>
> Jesse Michaels wrote:
>>
>> Hello, I am running SquirrelMail 1.4.16, against EIMS Mail Server
>> which support IMAP.
>>
>> SquirrelMail is very slow at loading mailboxes. EIMS stores mail in a
>> single file, like UW IMAP server. If I telnet into the server, and
>> select a mailbox, one in which I feel it is not that large, perhaps
>> 3000 messages, I can get back a message count in under 3 seconds.
>>
>> SquirrelMail takes about 3 times as long to return the page.
>>
>> I have read all the docs at:
>> http://www.squirrelmail.org/wiki/SpeedWithUW
>> None of which seem to help.
>>
>> a1 OK login successful
>> a2 SELECT "Read Mail 2008"
>> * FLAGS (\Deleted \Seen \Recent \Answered \Flagged \Draft $MDNSent)
>> * OK [PERMANENTFLAGS (\Deleted \Seen \Answered \Flagged \Draft
>> $MDNSent)] OK
>> * 3320 EXISTS
>> * 0 RECENT
>> * OK [UIDVALIDITY 3299809062] OK
>> * OK [UIDNEXT 3350] OK
>> a2 OK [READ-WRITE] SELECT succeded
>>
>> a3 CAPABILITY
>> * CAPABILITY IMAP4rev1 AUTH=CRAM-MD5 AUTH=DIGEST-MD5 AUTH=NTLM UIDPLUS
>> IDLE QUOTA NAMESPACE
>> a3 OK CAPABILITY completed
>>
>> I have spoken with the developer, and he states that even though EIMS
>> does not support sort and thread, that should have no impact on
>> performance, and in fact it could slow it down.
>>
>> What is the trick to speed up web email? Or, can anyone give me any
>> insight as to what my email server is doing wrong. Can someone give
>> me some rough select times on mailboxes that have a lot of messages in
>> them as well?
>> --
>> Scott
>>
>
> Select times for mailbox with 5000 messages
> Cyrus - 1,3 sec
> Courier - 55 sec
> hMailServer - 1,5 sec
> UW - 440 sec
>
> Select time depends on caching methods used by IMAP server. It might take
> even 3500 seconds on UW.
>
> SORT extension does not improve SquirrelMail performance, if mailbox is not
> sorted.
>
> If mailbox is sorted, SORT extension does improve SquirrelMail performance.
> With SORT extension mailbox sorting is performed on IMAP server and it puts
> more stress on IMAP server. EIMS developer won't like it, but it is faster
> than sorting messages in PHP based webmail. Sorted mailbox performance might
> be abysmal, if IMAP server does not cache message envelope information or
> uses RAM to cache it.
>
> Other example
> Load time for SquirrelMail mailbox with 5k messages, 15 messages per page,
> sorted by sender.
> * No sort extension (courier maildir) - 6314,06
> * Courier (maildir) - 1815,98
> * Cyrus - 829,48
> * UW (mbox) - 4575,44
> * hMailServer - 15163,11
>
> Tests are performed on PHP setup with very high memory and timeout limits
> and optimized memory usage. If SORT extension is not used on 5k sorted
> mailbox, you might hit PHP memory limits instead of getting sorted results.
>
> --
> Tomas
> --
> View this message in context:
> http://www.nabble.com/performance-issues-that-seemingly-can-not-be-solved.-tp19755942p19757062.html
> Sent from the squirrelmail-users mailing list archive at Nabble.com.
>
>
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-R
--
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Rich Hall
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