Stan Hoeppner <s...@hardwarefreak.com> writes: > On 5/6/2011 3:07 PM, Kamil Jońca wrote: >> >> I have some archive mails in gzipped mboxes. I could use them with >> dovecot 1.x without problems. >> But recently I have installed dovecot 2.0.12, and they are slow. very >> slow. >> >> Creating index files takes about 10 minutes for ~20M file with 560 >> messages for bzipped mbox, for gzipped is little better but still >> unusable :( > > What other software, if any, was also upgraded/changed when you > upgraded to Dovecot 2.0.12? Libraries? Filesystem? Daemons? What
IIRC only dovecot - I simply upgrade debian package via aptitude. > they have been mildly corrupted along the way? Did this bad behavior > start directly after the upgrade or did 2.0.12 run the zipped mbox Yes, immediately after upgrade. > files at acceptable speed for a while? Did you add/enable any new > Dovecot plugins that you weren't running in 1.2.x? > No, the only thing was converting old config to dovecot-2 config. >> Stracing dovecot process shows that every ~ 20 messages it rereads >> complete mbox file. > > Can you be a bit more specific here? What do you mean by "rereads > complete mbox file"? I'm not a dev, but that sounds suspiciously like Sorry, my fault, more correctly is to say: "regularly". > an error handling mechanism. I.e. an error occurred while processing, > or the file may have changed while processing, so we start over. I'm almost sure that file is not changed. > Could you have a buggy inotify/dnotify or something along those lines? How to check it? > Do you now have something else running say, at the filesystem level, > that that is making Dovecot think the file has changed even though it > hasn't? Are you zipping these mbox files via a cron job that is > running every few seconds instead of every few hours or days? No. These files were compressed once by mutt, and then only read as archive via dovecot. > > Something is apparently causing Dovecot to reread these files > regularly, and I'd guess it's probably not a Dovecot bug. Did you run > strace when accessing a non-compressed mbox file for comparison? http://strony.aster.pl/kjonca/dovecot.log.gz <- uncompressed mbox http://strony.aster.pl/kjonca/dovecot.gz.log.gz <- gzipped mbox KJ -- http://blogdebart.pl/2009/12/22/mamy-chorych-dzieci/ KRETYNIZM - ułomność predysponująca często do wampiryzmu (J.Collin de Plancy "Słownik wiedzy tajemnej")
