We have a moderately sized Cyrus installation with 2 TB of storage and a few thousand simultaneous IMAP sessions. When one of the backup processes is running during the day, there's a noticable slowdown in IMAP client performance. When I start my `mutt' mail reader, it pauses for several seconds at `Selecting INBOX'. That behavior disappears when the backup finishes. Where's the first place to look for this problem? I/O statistics show a higher read bandwidth while the backup is running, but writes still dominate. The backup would typically read all of the files in a single Cyrus partition. -- -Gary Mills- -Unix Support- -U of M Academic Computing and Networking- ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
