• Robert Schetterer <rs@sys4.de>:

Am 20.07.2013 20:30, schrieb Robert Schetterer:

...

Hi Timo, i have reports from few users about lost performance with 2.17 maildir bigger mailboxes ( up to 2 GB ), i also use zlib plugin

what about this patch.....,may not working as i should?

http://hg.dovecot.org/dovecot-2.1/rev/9c23d1fb8969

Best Regards MfG Robert Schetterer

i checked this reverting to 2.1.15 (had only this pre compiled) perfomance gets better with this, looks like the problem is getting more worst with having bigger mailboxes and heavy use of subfolder trees any idea?

I wonder why this would matter. zlib is compressing EACH message individually, so the actual SIZE of the mailbox would not matter (the number of message would matter, though).

Which operations are slow? Folder listing? Actually accessing messages?

-- [*] sys4 AG

http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München

Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein

Am 22.07.2013 14:23, schrieb Robert Schetterer:

Am 22.07.2013 13:50, schrieb Ralf Hildebrandt:

...

• Robert Schetterer <rs@sys4.de>:

...

Am 20.07.2013 20:30, schrieb Robert Schetterer:

...

Hi Timo, i have reports from few users about lost performance with 2.17 maildir bigger mailboxes ( up to 2 GB ), i also use zlib plugin

what about this patch.....,may not working as i should?

http://hg.dovecot.org/dovecot-2.1/rev/9c23d1fb8969

Best Regards MfG Robert Schetterer

i checked this reverting to 2.1.15 (had only this pre compiled) perfomance gets better with this, looks like the problem is getting more worst with having bigger mailboxes and heavy use of subfolder trees any idea?

I wonder why this would matter. zlib is compressing EACH message individually, so the actual SIZE of the mailbox would not matter (the number of message would matter, though).

Which operations are slow? Folder listing? Actually accessing messages?

accessing , list messsages , copy, move delete operations

it must not be zlib related, that was a guess there are two other patches only maildir related might be a better guess

http://hg.dovecot.org/dovecot-2.1/rev/7389ff729d2e http://hg.dovecot.org/dovecot-2.1/rev/4c05b9447a10

other patches dont look related to me, however i use a lot of other plugins which might also involved

sorry not easy to measure , but performance here is def better with 2.1.15 , same client setup, no special failures about that in debug logs

...

Best Regards MfG Robert Schetterer

back to 2.1.17

looks like

rising values for /proc/sys/fs/inotify/max_user_instances helped however i got no warning in the logs

so wait and and see for now

Best Regards MfG Robert Schetterer

-- [*] sys4 AG

http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München

Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein

Am 23.07.2013 14:17, schrieb Ralf Hildebrandt:

• Robert Schetterer <rs@sys4.de>:

...

back to 2.1.17

looks like

rising values for /proc/sys/fs/inotify/max_user_instances helped however i got no warning in the logs

so wait and and see for now

Wasn't this the bug I encountered with inotify & the linux kernel?

yes , since then it should produce a warning in the logs ( havent found that at mine) , things now look better ,but i ll wait what power users will report, i am not a good tester in this case , cause i do too qualified mail handling *g

Best Regards MfG Robert Schetterer

-- [*] sys4 AG

http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München

Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein