On Wed, November 23, 2005 17:09, John Madden wrote:
> I've noticed that over time, a SQM session will gradually slow down to
> the point I think there's something wrong with the mail server.  A
> logout/login fixes the issue.  Checking into the session files (shared
> between nodes over NFS), I found that while the initial session file is
> quite small, it grows over time and quickly becomes ridiculously large,
> like 2-4MB.  I assume this is the reason for the performance degredation.
>
> Is there any explanation for this and is it normal?  Is there setting to
> put a cap on session size?
>

Yes, if you do not use server side sorting and deal with large mailboxes
then the session can become pretty big in 1.4.5 because it fetches the
headers of each message in a mailbox in order to do the sort.

If that's the case, then enable server side sorting if your server
supports it or try a squirrelmail 1.5.1 CVS snapshot because it caches
data more effective and it doesn't need to download all the headers to do
the sorting. Only the header where you sort on will be downloaded and it
isn't stored in the session. Instead, the result of the sort, a sortred
uid list is stored in the session.

Regards,

Marc Groot Koerkamp.






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