Quoting [email protected]:
Zitat von Jose Manuel Blanco <[email protected]>:
Hi
After I recently installed in my new server Horde 3.3.8 + IMP
4.3.7, users with a large inbox take around 4 to 5 minutes to login.
I know this has been reported and I have read the PERFORMANCE
document and all I could find on the web about increasing the cache
(horde_cache, memcache, mysql memory, etc). The problem is
that my configuration is almost identical to the one I had before
(except the server is newer and I can set bigger cache values).
Even more,
with my old webmail, logins of users with more than 40000 mails in
their inboxes were almost instantaneous (even the first time they
login), so it looks
to me as if it's not a cache issue. Could it be that my old server
is only refreshing from the IMAP backend the 20 mails it shows in
the first screen, while the new one is trying to download the whole
40000 headers? If so, I haven't been able to see what parameter
could be changed to make my new webmail to behave like that, and
that's the only logical explanation for my old webmail behaviour
that I can think of.
There are some real performance killers like image preview and the
like which where not available in older releases. Try disable them.
There are also some new features which can stress the DB. Have a
look if you are using old datatree for shares and the like. There
also has been some change in detecting IMAP root. Maybe you are
scanning too much at login.
Unfortunately, this is a much too broad statement to pinpoint the
issue. I can vouch that if IMP is correctly configured that it can
handle loads better than any other open-source webmail solution. This
is because IMP (and Horde in general) is designed to be
ultra-configurable and has its sub-systems clearly separated to allow
for optimization of each sub-system.
But making a broad guess on your issue - if not using an IMAP server
that does server-side caching or server-side sorting, you will most
likely see terrible performance if sorting large mailboxes by anything
other than arrival time. This is not an issue with IMP. This is an
issue with your setup.
michael
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Michael Slusarz [[email protected]]
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