[rt-users] CPU Wait Maxed Out

Eriks Goodwin-Pfister eriks at centritech.net
Tue Jun 1 10:57:41 EDT 2010


I deleted the mailq, redirected the address for the odd mailq entries to an alternate mailbox, etc.

As for memory, I see from sorting "top" by memory usage that apache is the memory hog...  Any idea what would cause this on an RT box?

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND  
 2665 apache    15   0  207m  81m 3692 S  0.0  8.6   1:29.41 httpd                                                                                                                
 2387 apache    15   0  206m  78m 3692 S  0.0  8.3   1:44.80 httpd                                                                                                                
 2668 apache    17   0  206m  75m 3896 S  0.0  8.0   1:32.49 httpd                                                                                                                
 2496 apache    15   0  205m  70m 3880 S  0.0  7.5   1:12.07 httpd                                                                                                                
 2669 apache    15   0  204m  67m 3892 S  0.0  7.1   1:10.97 httpd                                                                                                                
 2391 apache    15   0  206m  65m 3636 S  0.0  6.9   1:07.24 httpd                                                                                                                
 2385 apache    15   0  210m  62m 3308 S  0.0  6.6   1:29.17 httpd                                                                                                                
 2401 apache    17   0  208m  57m 3644 S  0.0  6.1   1:18.16 httpd                                                                                                                
 2388 apache    15   0  204m  56m 3568 S  0.0  6.0   1:01.46 httpd                                                                                                                
 2389 apache    15   0  207m  56m 3824 S  0.0  5.9   1:10.61 httpd                                                                                                                
 2390 apache    15   0  208m  54m 3592 S  0.0  5.8   1:33.90 httpd                                                                                                                
 2493 apache    17   0  203m  50m 3844 S  0.0  5.4   1:02.30 httpd                                                                                                                
 2392 apache    15   0  207m  50m 3232 S  0.0  5.3   1:10.83 httpd                                                                                                                
 2386 apache    15   0  207m  47m 3592 S  0.0  5.0   1:24.97 httpd                                                                                                                
 2494 apache    15   0  205m  46m 3648 S  0.0  4.9   1:10.75 httpd                                                                                                                
 2492 apache    15   0  204m  43m 3812 S  0.0  4.6   1:11.58 httpd                                                                                                                
 2275 root      15   0  115m  15m 3116 S  0.0  1.6   0:04.33 httpd                                                                                                                
 2159 mysql     18   0  138m 8704 2792 S  0.0  0.9   0:01.67 mysqld     


----- Original Message -----
From: "Kenneth Marshall" <ktm at rice.edu>
To: "Eriks Goodwin-Pfister" <eriks at centritech.net>
Cc: "rt-users" <rt-users at lists.bestpractical.com>
Sent: Tuesday, June 1, 2010 9:55:06 AM
Subject: Re: [rt-users] CPU Wait Maxed Out

On Tue, Jun 01, 2010 at 09:48:24AM -0400, Eriks Goodwin-Pfister wrote:
> But then my question becomes, "why did this happen all of a sudden?"
> We have not changed user loads, usage levels, etc. This is a dedicated
> box being used by about 5 active users and 20 intermittent (once a
> week) users. Is 1 Gb of memory not enought for RT with such a light
> loading?
>
> And does anyone have any idea what those odd mailq entries are? I have
> to go in and delete several hundred of them every day or two.
>
> Thanks,
> Eriks
>

Hi Eriks,

Obviously, something did change or you would not be having a
problem. :) The harder part is to discover what changed and how
it is affecting your system. Those odd mailq entries if they
are being fed to RT could bump the load on your system. Do
you have any kind of filtering pre-RT to prevent bogus mail
from hitting the RT server?

Regards,
Ken

>
> ----- Original Message -----
> From: "Richard Skelton" <Richard.Skelton at infineon.com>
> To: "Eriks Goodwin-Pfister" <eriks at centritech.net>
> Sent: Tuesday, June 1, 2010 9:07:58 AM
> Subject: Re: [rt-users] CPU Wait Maxed Out
>
> Hi Eriks,
> Yes as I thought you are short on real memory.
> Look at the swap.
> Here is a busy 16 core Linux system of mine with load of free memory:-
> procs -----------memory---------- ---swap-- -----io---- --system--
> ----cpu---- r b swpd free buff cache si so bi bo in cs us sy
> id wa

...lots of repetitive information deleted...



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