[RCU] roundcube causes server high load with apache

Andrey waster2008 at gmail.com
Thu Jun 4 20:38:06 CEST 2009

Also I've noticed that every time when average server load is growing 
number of active APACHE a processes is also growing. For example if I do 
'netstat -anpl | grep STREAM | grep apache'  to get number of active 
UNIX domain sockets (servers and established) with apache I got 5 
apaches when average server load is 5 and 1-2 apaches when load average 
is quite small.

Then if I grep netstat for PID of these apaches above I see connections 
to my IMAP server with CLOSE_WAIT state.


Philip Iezzi пишет:
> Hi

> I've just encountered a similar performance issue which I have never 
> noticed on earlier Roundcube versions up to 0.2.1. One single PHP 
> process was hanging for a looooong time (don't remember, but must have 
> been 5min+, might as well have been hanging for hours). I was killing 
> this process and it was gone, no other processes hanging.
> here's my current setup (https://webmail.onlime.ch/):
> - Roundcube 0.2.2
> - Debian Lenny 5.0.1
> - Apache 2.2.9
> - PHP 5.2.9 (patched with Suhosin 0.9.7 + module 0.9.27 enabled)
> - PHP running as CGI under Apache's SuExec
> Before killing the process I checked /proc/<PID>/environ to figure out 
> it was Roundcube. If any Roundcube developer is interested in my 
> environment variables, I can send you the whole output of 
> /proc/<PID>/environ off-list. I don't like to post it here for 
> privacy/security reasons.
> Just some information that might help:
> HTTP_REFERER=https://webmail.onlime.ch/?_task=mail&_action=preview&_uid=4786&_mbox=INBOX&_framed=1 
> REQUEST_URI=/?_task=mail&_action=get&_uid=4786&_mbox=INBOX&_part=49
> HTTP_USER_AGENT=Mozilla/5.0 (Macintosh; U; PPC Mac OS X; de-de) 
> AppleWebKit/523.12.2 (KHTML, like Gecko) Version/3.0.4 Safari/523.12.2
> We are talking about a very low volume Roundcube installation, usually 
> just 5-10 mails sent per day. It's running on a 2x Xeon Quad Core E5405 
> 2,00GHz / 8GB RAM machine, a powerful server that has a load average of 0.2
> So far, that's the first time I noticed such weird behavior with 
> Roundcube. I hope it's nothing serious. Good luck in bughunting! thx
> Take care
> Philip
> On 28.05.2009, at 07:31, Andrey wrote:
>> Hello,
>> I've recently installed Roundcube 0.2.2 for our users on 1024 RAM with
>> 3Mhz cpu server. But the problem was appearing with high server load.
>> According to the logs we have about 700 messages sent everyday and about
>> 3500 successfull and not sucessfull logins. In the period of all day
>> load is increasing and after midnight it can be about 9 and it caused by
>> Apache processes. That is very strange because in that period almost all
>> users are sleep and we have only few logins and sent messages. This is
>> only one virtual host running on the host. I've tried to use Debian Etch
>> and Lenny.
>> Aslso I can confirm that after apache restarting high load goes down to
>> 0.2-0.4 but then starts to increase slowly again. So as the temporary
>> solution I use "apache restart" instead "apache reload" in logrotate 
>> config.
>> I guess the problem is in Roundcube somewhere?
>> Dear RC developers. So can you comment this situation? Why it can happen?
>> Thanks.
>> _______________________________________________
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