On Sun, Oct 26, 2008 at 10:15 AM, Timo Sirainen <[EMAIL PROTECTED]> wrote: > On Sun, 2008-10-26 at 09:57 -0700, Brandon Lamb wrote: >> basically I need to find out where to start looking to find out what >> is the problem with my dovecot pop3 setup. I switched from courier >> imap/pop3 to dovecot imap/pop3. I have had super high loads (40+ and >> overnight one server went to 511) and its been a nightmare fighting >> with this new setup for the last two weeks. >> >> I did manage to narrow the problem down to it being with the pop3 part >> of dovecot. I am not sure why the load keeps going so high. > > Usually this is because Dovecot wants to calculate the messages' virtual > sizes. See maildir performance in http://wiki.dovecot.org/POP3Server. > There were also some issues with this where Dovecot didn't always add > the virtual size to dovecot-uidlist, but they were fixed in v1.1.5. > > So the initial high loads are expected if your file names don't > contain ,W=size in them, but after that it should slow down. Of course > if your new messages don't contain ,W= in them either, the load is still > higher than it could be (but then again, Courier does the same thing so > it shouldn't be higher than with Courier). > > One possibility would be to just make Dovecot violate POP3 spec and > return file sizes as message sizes. Some servers like qmail-pop3d do > that and they apparently work well enough.. This could be done by > changing mail_get_virtual_size to mail_get_physical_size in > src/pop3/client.c
Im willing to try this, I really dont want to go back to courier, dovecot just seems like a way cleaner setup. I found the line to edit so I will recompile and give that a try. I did modify exim to add the W=size but it also required use_crlf and that seemed to break something else. I also found a couple posts saying to use INDEX=MEMORY for the pop3 part, but I didnt understand if that actually DISABLED pop3 using indexes or if it really stored something in memory, and if so what happens on a reboot, so I am confused on if i should tell the pop3 part to use the same /dovecot-index that I specified for imap. I also dont know if I made so many changes that I didnt give any of them time to work themselves out. We were just in panic mode trying to put out fires hehe.
