On Thu, 2010-10-14 at 15:47 +0200, Ralf Hildebrandt wrote:
Colleague returned from vacation today and gave some ideas. Today I turned off the "mail_log" and "notify" plugins and the load dropped considerably. Both plugins were used with default settings. Load as in I/O load or CPU load?.. If CPU, which process was eating it?
CPU, specifically system (not user, not idle, not wait).
Process: No special process was peaking. How is the logging implemented? Each imap process is logging by itself?
dovecot-lda logs directly, with everything else it goes through "dovecot/log" process. Are you logging to syslog? Hmm. System CPU usage is about time spent in syscalls.. Is it doing too many tiny write()s or something? .. Maybe I should strace the processes and see if something's too slow there.