Re: Upgraded to surgemail_39e_linux performance crippled

Generally the imap module in the new version is more
efficient than the 
prevoius one.

Can you send me a
	tellmail status
showing the server under load and your surgemail.ini,
thanks

also let me know what platform you are on. if linux try
	http://netwi
nsite.com/ftp/misc/l1.tar.gz
and let me know results and send me status from that build
under load.

	ChrisP.


surgemail-listnetwinsite.com wrote:
> HI
> 
> We were running SurgeMail 3.8k4 we upgraded to version
3.9e on Friday. Ever since then performance has been
terrible. The CPU usage is a lot higher than normal. and the
system has ground to a halt. The performance previously was
fine.
> 
> Average load is now 2.30, 1.95, 1.65 for the below
usage. during the day the load is only twice this amount
usage but the average loads was peaking over 20  which is
crazily high and was nowhere-near what it was previously =(
> 
>  SMTP:    9/60      106   1.20   0.65  215%    4.7k
>   POP:    9/94        0   2.21   1.52   91%  708.0k
>   WEB:    1/11        0   0.36   0.37   15%   20.8k
>  IMAP:   36/87        0   0.09   0.04    0%    0.1k
>  SEND:    1/7         0   0.08   0.09   54%    0.1k
> Total:  106/314     106   4.07   2.74  376%  733.7k
> 
> If you notice that the amount of threads in use this
does not add up to the above. Also some time the threads
just hang. and start building up. Again this did not happen
before upgrading.
> 
> Is the IMAP implementation more CPU intensive? We
generally have about 80 to a max of about 110 IMAP session
open in peak usage. 
> 
> Thanks for your help.
> 
> 

It should be primarily used for reporting but might be used
to a limited 
extent to apply the thread limits etc. I'll have to do some
investigation. 
I'll try and post a more thorough answer tomorrow 

Marijn

--------------------------------------------------
From: <surgemail-listnetwinsite.com>
Sent: Wednesday, May 07, 2008 5:04 AM
Newsgroups: netwin.surgemail
Subject:  Re: [SurgeMail List] Re: Upgraded to
surgemail_39e_linux 
performance crippled

> Also I forgot to bring this to your attention.
>
> If you look at the stats There are missing channels.
When you look at the 
> advanced status SSL IMAP are classified as Misc
channel. Does surgemail 
> use this information for resource management or is it
just for 
> administration only?
>
> Thanks.
> 

OK thanks... I've done some investigation. Indeed, as it
stands the SSL port 
imap connections are not getting counted as IMAP threads and
as a result is 
also bypassing some of the checks and limits that normally
get applied. TLS 
based SSL imap connections are not affected.

I'll run it past chris first to see if there is any reason
for this (I don't 
see why there would be) and then make sure it is fixed.

Marijn
--------------------------------------------------
From: <surgemail-listnetwinsite.com>
Sent: Wednesday, May 07, 2008 5:04 AM
Newsgroups: netwin.surgemail
Subject:  Re: [SurgeMail List] Re: Upgraded to
surgemail_39e_linux 
performance crippled

> Also I forgot to bring this to your attention.
>
> If you look at the stats There are missing channels.
When you look at the 
> advanced status SSL IMAP are classified as Misc
channel. Does surgemail 
> use this information for resource management or is it
just for 
> administration only?
>
> Thanks.
>