[Xymon] High CPU Load Rendering Graphs

Tue Apr 29 10:05:39 CEST 2014

Hi Ryan

Trying to narrow this one down a little, based on what was same and
different on your system.
We can exclude
 - Architecture. I have x86 and you had Sparc.
 - Solaris build version. I have s10u5 and you had s10u11. But it worked on
S10u10.
Makes me wonder what Xymon dependencies may have been upgrade between u10
and u11.

Things I am checking. Can you check what versions you have please?
 - I am using perl 5.8.4. What are you using?
 - I was using Apache2 2.2.22, and upgrade to 2.2.26 and we still have this
issue.
 - CGI version 3.33
 - RRDtool 1.4.7

Thanks
Vernon

On 29 April 2014 13:48, Vernon Everett <everett.vernon at gmail.com> wrote:

> Hi Ryan
>
> Not sure it's related to the Solaris release or a specific patch.
> The server is an old one, running S10u5, and was last patched in 2011.
>
> Regards
> Vernon
>
>
>
>
> On 29 April 2014 13:34, Novosielski, Ryan <novosirj at ca.rutgers.edu> wrote:
>
>> It appears as if, for me, upgrading from Solaris 10u10 to Solaris 10u11
>> caused this problem. Incidentally, I'm on SPARC. But I know it's just about
>> the same issue as when I did a truss, it was the same type of stuff that
>> was going on (searches through locale and font directories). I think it
>> took nearly a minute to generate graphs.
>>
>>
>>  *From*: Novosielski, Ryan [mailto:novosirj at ca.rutgers.edu]
>> *Sent*: Tuesday, April 29, 2014 12:59 AM
>> *To*: 'everett.vernon at gmail.com' <everett.vernon at gmail.com>; '
>> xymon at xymon.com' <xymon at xymon.com>
>> *Subject*: Re: [Xymon] High CPU Load Rendering Graphs
>>
>>  I have this problem too with Solaris. Or I should say I went from not
>> having this problem to having this problem when I did a Solaris upgrade
>> (from one update to another). I rolled back the upgrade and the problem
>> went away. But I never identified what patch (presumably a patch) caused
>> the problem. I'd love to fix this and move forward though.
>>
>>
>>  *From*: Vernon Everett [mailto:everett.vernon at gmail.com]
>> *Sent*: Wednesday, April 23, 2014 10:17 PM
>> *To*: Xymon mailinglist <xymon at xymon.com>
>> *Subject*: [Xymon] High CPU Load Rendering Graphs
>>
>> Hi all
>>
>> My Xymon server 4.3.10 is burning the CPU cycles when we view multiple
>> graphs, like the trends page, and takes about 5 seconds to render a single
>> graph in a single-graph page view.
>>
>> It's a Sun Fire X4150 with 4Gb of RAM, running Solaris 10 update 5..
>>
>> Version                          Location Tag
>> -------------------------------- --------------------------
>> Intel(R) Xeon(R) CPU           X5460  @ 3.16GHz CPU 1
>>
>> Not a very powerful box, and a bit dated, but I have seen significantly
>> better performance on far lesser systems.
>> So I am not really thinking the issue is with the hardware.
>> It's been slow since it was installed.
>> If I view the trends column, I can see the CPU load jump from below 1 to
>> over 10 at times.
>> Running prstat or top in another window while viewing the trends column,
>> the process ranking by CPU gets dominated by showgraph.cgi, owned by the
>> web server user.
>> Top under normal conditions.
>> CPU states: 99.9% idle,  0.0% user,  0.1% kernel,  0.0% iowait,  0.0% swap
>> Top rendering the trends column.
>> CPU states:  0.0% idle, 93.8% user,  6.2% kernel,  0.0% iowait,  0.0% swap
>>
>> Also getting this error
>> (128)Network is unreachable: connect to listener on [::]:443
>> in my Apache error.log file, repeated every second while rendering the
>> graphs.
>> And from time to time, I get this one.
>> File does not exist: /opt/csw/apache2/share/htdocs/server-status
>>
>> Anybody seen anything like this?
>> Perhaps know of somewhere I can look for more info?
>>
>> I have looked at this
>> http://lists.xymon.com/archive/2014-January/038780.html
>> But it doesn't seem relevant. Only 2 errant files, and deleting them made
>> absolutely no difference.
>>
>> Other info that may be important....
>> bash-3.00# ./httpd -v
>> Server version: Apache/2.2.22 (Unix)
>> Server built:   Jun  1 2012 05:09:20
>> bash-3.00# ./httpd -V
>> Server version: Apache/2.2.22 (Unix)
>> Server built:   Jun  1 2012 05:09:20
>> Server's Module Magic Number: 20051115:30
>> Server loaded:  APR 1.4.5, APR-Util 1.3.12
>> Compiled using: APR 1.4.6, APR-Util 1.3.12
>> Architecture:   32-bit
>> Server MPM:     Prefork
>>   threaded:     no
>>     forked:     yes (variable process count)
>> Server compiled with....
>>  -D APACHE_MPM_DIR="server/mpm/prefork"
>>  -D APR_HAS_SENDFILE
>>  -D APR_HAS_MMAP
>>  -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
>>  -D APR_USE_FCNTL_SERIALIZE
>>  -D APR_USE_PTHREAD_SERIALIZE
>>  -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
>>  -D APR_HAS_OTHER_CHILD
>>  -D AP_HAVE_RELIABLE_PIPED_LOGS
>>  -D DYNAMIC_MODULE_LIMIT=128
>>  -D HTTPD_ROOT="/opt/csw/apache2"
>>  -D SUEXEC_BIN="/opt/csw/apache2/sbin/suexec"
>>  -D DEFAULT_PIDLOG="/var/run/httpd.pid"
>>  -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
>>  -D DEFAULT_LOCKFILE="/var/run/accept.lock"
>>  -D DEFAULT_ERRORLOG="logs/error_log"
>>  -D AP_TYPES_CONFIG_FILE="etc/mime.types"
>>  -D SERVER_CONFIG_FILE="etc/httpd.conf"
>>
>> Thanks
>> Vernon
>>
>>
>> --
>> "Accept the challenges so that you can feel the exhilaration of victory"
>> - General George Patton
>>
>
>
>
> --
> "Accept the challenges so that you can feel the exhilaration of victory"
> - General George Patton
>

-- 
"Accept the challenges so that you can feel the exhilaration of victory"
- General George Patton
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