[Serusers] SER becomes very slow

[Tirpák Miklós]

Hello Jan!

On 08/31/04 14:56, Jan Janak wrote:
> On 31-08 09:07, Tirpák Miklós wrote:
> 
>>Does SER do any DNS query on startup? 
> 
> 
>   Yes, to determine hostnames and aliases that will be "local" to the
>   server, from listen directive.
> 
> 
>>In case of enum DSN query the DNS 
>>server responded within one second according to the log.
> 
> 
>   And did ser block after that ?

No, it kept on running.

> 
> 
>>I saw that the parsing of ser.cfg was also slow when watching the log file 
>>with tail -f /var/log/messages:
>>
>>Aug 30 10:00:42 iptel1 ser: loading module /usr/lib/ser/modules/sl.so
>>...
>>Aug 30 10:00:43 iptel1 ser: routing table 0:
>>Aug 30 10:00:43 iptel1 ser: if (
>>...
>>Aug 30 10:01:02 iptel1 ser: };
>>...
>>
>>20 seconds :( This section of the log is attached.
> 
> 
>   Do you have debugging enabled (debug higher than 3) ? If so then
>   syslog can easily become a bottleneck, because ser will write lots of
>   debug messages.

Yes, debugging is set to 7 and the /var/log/messages file is 130 Mb (rotated daily). I will set debugging to 3 and wait 
some days. We use nagios to control the service which measures the response time. Usually it is about 70 msec, let us 
see if any alert messeage occures.

> 
> 
>>An interesting line in the log:
>>DEBUG: open_fifo_server: FIFO stat failed: Inappropriate ioctl for device
> 
> 
>   Check whether the file exists, of what type it is and if SER has
>   permissions to access it.

The file exists, but I think that SER rewrites it. It does not matter in case of this.

Thank you,
Miklos

> 
>    Jan.
> 
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-- 
---------------------------------------------------------------------------
   Miklos Tirpak
   Computer and Automation Research Institute   e-mail : mtirpak at sztaki.hu
   Hungarian Academy of Sciences                phone  : (361) 279-6011
   H-1132 Budapest, Victor Hugo u 18-22         fax    : (361) 279-6021