performance problem

[Edgar_8]

We have an L class server(4 CPU @ 440Mhz RAM 4Gb) running HP-UX 11.0, that is experiencing performance
problems :

1.when we run a "sar -m 5 5" the stats returned are in a 5:1 ratio (msg/s : sema/s). Is this OK or is it
an issue? The value for dbc_max_pct is at 7% & dbc_min_pct at 5%.

If anyone could provide some assistance regarding the above it would be most appreciated.

Thanks in advance!

[Vishwas Pai]

See if the following is useful, there one
HPUX perf CookBook as part of the discussion.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=467288

HTH -vishwas

[Edgar_8]

Hi Vishwa,

We have gone through the pdf but there is no explanation regarding the "sar -m" stats or whether ot not the dbc_max/min_pct is correct?

Thanks in advance!

[Jean-Luc Oudart]

Hi Edgar,

I don't think you should have a specific ratio between message operations per second and semaphore operations per seconds.

Regarding your buffer size, 7% is ~290Mb.
We fixed our buffer to 300Mb on HPUX 11.0 and have no issue with it.

What are the performance issue symptoms ?
What kind of processing are you doing on this server ?

Regards
Jean-Luc

[Edgar_8]

Hi Jean-Luc,

We have 3rd party clients/card cages that via TCP/IP communicate with the server.Currently we seing that there
are connectings being made but no acknowledgement messages are being sent back from the server to the clients.
The commands used was nestat -s.

Any idea how we can determine what is causing the commmunication process not to complete?

Thanks in advance!

[Alzhy]

Why are you singling out "sar -m" stats and what really is the nature of your "performance problems". If you could be more specific please.

[Sridhar Bhaskarla]

Hi Edgar,

There is absolutely little if not no connection between dbc_*_pct and the stats displayed by sar -m 5 5.

The first column shows message queue operations where as the second one is semaphore. I wouldn't try to compare the relation between them.

Why are you thinking that there is a performance issue on the system?

-Sri

[Edgar_8]

Hi All,

The server has clients that are realtime attempting to send data to the server via tcp/ip.
The server itself has an application running on it which should be able to gather realtime
data off the clients but no data is being propagated through to the application via the server.
The "sar -m" was used to try and see what performance is based on message counts.

Any help would be most appreciated!