cyrus imap slow on Fedora 13&14

[Adam Tauno Williams]

On Tue, 2010-12-21 at 21:39 +0100, Damijan Senc(ar wrote:
> Hi!
> I migrated cyrus imap server  from an old fedora to Fedora 13
> (cyrus-imapd-2.3.16-3.fc13.i686).
> Works well and fast in  LDAP+Postfix+sasl environment from Thunderbird
> client.
> The problem is when user read big mail boxes (e.g. 1000+ mail in one
> folder) from webclient (Squirrelmail) installed on same or other server.
> The same squirrelmail installation (I only changed imap server address)
> worked well in combination with older cyrus installations.
> Now I tried to find out what is wrong and only thing I found is that
> during reading mail from imap server from web client top command shows
> on imap server 100%wa!
> I tried fresh installation on F13 with same outcome.
> An idea what could be the cause of that problems?

Are you running an IMAP proxy?