-----Original Message----- From: Andrew Morgan <morgan@xxxxxxxx> Sent: December 7, 2009 5:37 PM To: John Madden <jmadden@xxxxxxxxxxx> Cc: info-cyrus@xxxxxxxxxxxxxxxxxxxx <info-cyrus@xxxxxxxxxxxxxxxxxxxx> Subject: Re: proxyd cpu usage On Mon, 7 Dec 2009, John Madden wrote: >> At a guess, it sounds like load from LIST. You should be able to see >> what's causing the load if you have several seconds. For example, >> enable telemetry and look for long turn around. Or use strace (or >> equiv). Have you experimented with foolstupidclients? What is your >> client mix? How many mailboxes do you have? > > I set up a second frontend to analyze a single client. Strace shows the > dumb: > > read(0, "00000002 LIST \"\" INBOX.*\r\n", 4096) = 26 > read(0, "00000003 LIST \"\" user.*\r\n", 4096) = 25 > read(0, "00000004 LIST \"\" *\r\n", 4096) = 20 > > I tested fullstupidclients on the production frontend and it has cut > load significantly but that LIST "" user.* call is expensive (0.950 secs > 1 calls). I assume that's to poll for shared folders and I'm going to > look into whether or not it can be eliminated. I don't suppose there's > another fullstupidclients that improves responsiveness on this call, is > there? Those LIST queries seem a little odd coming from a normal user account in Cyrus. Are you logging in as a Cyrus admin account? Why is the client asking for "user.*"? Looking for shared folders? Andy ---- 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 ---- 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
