Tickets :: Comment on [#5634] Performance problems after upgrade to 4.1.4

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Comment	> After upgrading our Webmail installation this morning, we experienced > severe performance problems on our IMAP server. Backing out the > upgrade resolved the issue and subsequent tests confirmed that the > new Webmail is the source of the load, although we're not sure what > it is doing. I'm hoping you can give us some input or suggestions as > to where to look to resolve the problem. > > > > Our IMAP server is Cyrus IMAP4 2.1.11 running on Red Hat AS3. > Normally it handles around 2000 concurrent sessions and the load > average is between 7 and 20. After the upgrade, concurrent sessions > were as normal but the load went up to over 700. > > > > We are running the following on six application servers (all Red Hat > AS3, PHP 4.3.2): > > Horde 3.1.4 (upgraded from 3.0.4) > > IMP 4.1.4 (upgraded from 4.0.3) > > Ingo 1.1.3 (upgraded from 1.0.1) > > Turba 2.1.4 (upgraded from 2.0.2) > > Backend db is Postgres 7.3.19-RH and we also use LDAP as an address > book source. > > > > I am attaching two trace files our sysadmins took from our IMAP > server, showing the IMAP commands generated by the same sequence of > actions in both the old installation and the new one. It's not very > readable so I don't know if it's much help. > > > > We've also had 2 or 3 reports of individuals whose inboxes were empty > when they logged in after the upgrade. I'm still investigating those > so I don't have any info yet... > > > > Thanks in advance for any suggestions you can offer! > > > > -Robin > >
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