A NOTE has been added to this issue. ====================================================================== http://www.dbmail.org/mantis/view.php?id=964 ====================================================================== Reported By: bajizs Assigned To: ====================================================================== Project: DBMail Issue ID: 964 Category: IMAP daemon Reproducibility: random Severity: crash Priority: normal Status: new target: ====================================================================== Date Submitted: 23-Mar-12 12:37 CET Last Modified: 03-Dec-13 13:27 CET ====================================================================== Summary: Imap Deamon stop to work randomly Description: For last 14 days the dbmail-imapd randomly hangs up and stopped to work. In error and system logs I have nothing (file_logging_levels= 63). I can't turn on logging on debug level, because this is a production server with high mail load. Other applications works normally (dbmail-lmtpd, dbmail-timsieved, mysql, apache, smb etc). Turned on TLS, and heavy used function by users. The CPU usage by dbmail-imapd always 80-100% (server is with 2 cores, CPU usage can be 200%). The dbmail-imapd app two times hangs up at the times when no user logged in - at the night. In this time we make backup some files, we have haevy hdd and memory usage. We try to solve problem with more memory - at the moment I don't know result, because we order new memory banks today. Can be this solve the problem? Can i see why is the CPU usege to high? Can I see why hangs up the process at random time? ======================================================================
---------------------------------------------------------------------- (0003426) Bobbnz (reporter) - 24-Mar-12 20:54 http://www.dbmail.org/mantis/view.php?id=964#c3426 ---------------------------------------------------------------------- Would seem to me you do have insufficient RAM for high load. Also, have you followed the recommended procedures for optimizing mysql? http://dbmail.org/dokuwiki/doku.php/mysql_notes I would also be curious to know what you consider to be high load in terms of messages/day, and also the type of storage you are using, eg SCSI/SAS/SATA? ---------------------------------------------------------------------- (0003428) bajizs (reporter) - 03-Apr-12 07:48 http://www.dbmail.org/mantis/view.php?id=964#c3428 ---------------------------------------------------------------------- I think, the database is optimal - don't see any problem in performance status informations. Storage: SATA raid mirror CC 800 recived mail for the day, from 08:00AM to 02:00PM CC 550 mail, but all this mails stored in server (Only IMAP is allowed for users). We have 62 user on system, users have 500Mb - 5Gb mails in his IMAP storage. I dont know why CPU usage is always on 100% by dbmail-imapd (see attached picture) ---------------------------------------------------------------------- (0003440) bajizs (reporter) - 18-Apr-12 08:03 http://www.dbmail.org/mantis/view.php?id=964#c3440 ---------------------------------------------------------------------- Memory added to system, but dbmail-imapd CPU usage is 100%. What can be wrong? ---------------------------------------------------------------------- (0003444) bajizs (reporter) - 04-May-12 09:58 http://www.dbmail.org/mantis/view.php?id=964#c3444 ---------------------------------------------------------------------- OK, memory soves the problem of random crash. The dbmail-imapd don't stop working after 18 days of work. Maybe You can add code for logging out of memory exceptions, this can be solve a lot of problem. Other side, CPU usage not solved, it is always on 100%. How can see wat dbmail-imapd do? ---------------------------------------------------------------------- (0003607) bajizs (reporter) - 09-Nov-13 10:09 http://www.dbmail.org/mantis/view.php?id=964#c3607 ---------------------------------------------------------------------- CPU Usage problem solved with new version 3.1.7. (Seams :) ) ---------------------------------------------------------------------- (0003608) bajizs (reporter) - 14-Nov-13 13:44 http://www.dbmail.org/mantis/view.php?id=964#c3608 ---------------------------------------------------------------------- Not solved.... :( Again have thi issue. ---------------------------------------------------------------------- (0003609) bajizs (reporter) - 14-Nov-13 13:56 http://www.dbmail.org/mantis/view.php?id=964#c3609 ---------------------------------------------------------------------- Some errro: http://www.dbmail.org/mantis/view.php?id=1027 ---------------------------------------------------------------------- (0003614) abrus (reporter) - 03-Dec-13 13:27 http://www.dbmail.org/mantis/view.php?id=964#c3614 ---------------------------------------------------------------------- Can you verify that lsof -i lists several open Sockets with (CLOSE_WAIT) status while pop3d or imapd is at 100% CPU? Issue History Date Modified Username Field Change ====================================================================== 23-Mar-12 12:37 bajizs New Issue 24-Mar-12 20:39 Bobbnz Note Added: 0003426 24-Mar-12 20:48 Bobbnz Note Edited: 0003426 24-Mar-12 20:52 Bobbnz Note Edited: 0003426 24-Mar-12 20:54 Bobbnz Note Edited: 0003426 02-Apr-12 17:45 bajizs File Added: dbmail-100% CPU usage.png 02-Apr-12 17:45 bajizs Note Added: 0003428 03-Apr-12 07:48 bajizs Note Edited: 0003428 18-Apr-12 08:03 bajizs Note Added: 0003440 04-May-12 09:58 bajizs Note Added: 0003444 09-Nov-13 10:09 bajizs Note Added: 0003607 14-Nov-13 13:44 bajizs Note Added: 0003608 14-Nov-13 13:56 bajizs Note Added: 0003609 03-Dec-13 13:26 abrus Issue Monitored: abrus 03-Dec-13 13:27 abrus Note Added: 0003614 ====================================================================== _______________________________________________ Dbmail-dev mailing list Dbmail-dev@dbmail.org http://mailman.fastxs.nl/cgi-bin/mailman/listinfo/dbmail-dev
