> On 2014-10-29, at 17:45 , Registration <[email protected]> wrote: > > >> On 2015-03-29, at 14:10 , Arjen de Korte <[email protected]> wrote: >> >> Citeren Registration <[email protected]>: >> >>> Dear Imp users and developers, >>> >>> my problem is as follows: >>> - Login to Horde takes 3 seconds. >>> - Loading mails takes 7 seconds for a larger IMAP folder, and 1-2 seconds >>> for one with only a few messages in it. >>> - Top shows 97% CPU from php5-fpm, 3% from imap. >> >> That means that performance problems are probably in php. Do you use an php >> opcode cache / accelerator? If so, which one? > > XCache 2.0.0 > >> >>> - When messages are cached, everything gets super fast. >>> - The loading times are probably proportional to the amount of message >>> headers Imp loads for viewing. >>> >>> My questions are: >>> - Is this normal speed? >> >> It depends. How large is a large IMAP folder? How many folders do you have? > > I think that Imp caches something a few dozen messages around the currently > displayed ones. > So the IMAP folder size is not important, just that there are more than a few: > For example, an inbox with 10 messages is loaded in a second, a view of a > folder with 900 messages > takes 6-8 seconds, and also 6-8 seconds for a folder with 20000 messages. > >> >>> - If not, how would I systematically search for the problem? >>> - I tried xhprof, but I can't get the part where Imp refreshes messages >>> captured. >>> >>> My config: >>> - Debian Wheezy, Apache, php5-fpm, Dovecot, imapproxy >> >> Without version numbers, there is no way for us to tell what you're actually >> using. > > Kernel 3.2.0-4-amd64, Apache 2.2.22, PHP 5.4.39-0+deb7u1, Zend 2.4.0, XCache > 2.0.0, Dovecot 2.1.7 > >> >>> - Auth using Imp using MySQL/PDO connection via sockets >>> - Dovecot using Maildir, PAM disabled, mysql auth only >>> - Horde caching enabled >> >> Which cache backend? >> >>> - everything on one host >> >> If everything is on the same host, imapproxy is redundant an may even hurt >> performance if you have a modern IMAP server like Dovecot. > > Ok, disconnected and purged it, no visible difference. > >> >>> - standard rented server >> >> I wonder what the specifications of a 'standard rented server' are. :-) > > AMD Opteron 6272, 2 GB RAM, 100 GB SSD - not high end, but not stone-age > either, I think > >> >>> - everything up-to-date >> >> What may be up-to-date on Debian Wheezy may still be seriously out-of-date. > > I know, but no testing builds for me anymore...
I did a performance test using http://www.php-benchmark-script.com/bench.php, which resulted in ~7 seconds for my server, same time as the test on the benchmarks webpage. The only thing I could find which could be related to this is the Horde-specific message: FastCGI: server "/usr/lib/cgi-bin/php5-fcgi" stderr: PHP message: Cannot write Autoloader cache to backend. I tried setting proper path permissions, but no success, the error doesn't go away. -- imp mailing list Frequently Asked Questions: http://wiki.horde.org/FAQ To unsubscribe, mail: [email protected]
