topic Re: HP-UX 11.11 Differences in Operating System - HP-UX

HP-UX 11.11 Differences

nag_5 — Tue, 08 Mar 2005 10:13:56 GMT

Hi,
We have Apache 2.0.48 installed on HP-UX 11.11.

Both are the same servers, however we see a low performance on the first server, the performance on the second server is good.

I need to see the difference between 1st and the 2nd server, Could you please help on how to go about.

Like, Patchs../TCP/... etc. What may be realted to Apache 2.x and HP-UX 11.11( 11 i )

Tks, Nag

Re: HP-UX 11.11 Differences

A. Clay Stephenson — Tue, 08 Mar 2005 10:23:54 GMT

You have access to far more data than anyone else possibly could. You need to compare swlist outputs and kmtune outputs between the two boxes. You also need to compare your Apache configuration files. After that it's Performance Analysis 101 -- use Glance or the performance tools of your choice to compare the two machines. I do assume that the machines themselves are comparable so that you are not comparing for example an old D-box to an rp84xx, for example.

Re: HP-UX 11.11 Differences

Henk Geurts — Tue, 08 Mar 2005 10:27:57 GMT

whooh. lots of things to check....

is there a load balancer in front of the servers which doesn't do its job right and sends all the load to one?

but first i would use glance , netstat -an
to find differences.

make sure your kernel parms are equal.
check with sysdef of kmtune commands..

it just might tell you something.
regards

Re: HP-UX 11.11 Differences

nag_5 — Tue, 08 Mar 2005 11:10:10 GMT

Thanks for your quick Response.

- Both the servers are HP-UX 11.11.
- The kernel Parameters are identical.

Need to check the patchs still. There is one HP-UX patch missing, but it is missing on both the servers, which is related to HP-UX 11.11 and Apache 2.0.48 --> PHSS_26560

- There is no LOAD Balancer, we go direct to the Apache.

- The apache configuration's are the same.

Is there any additional loggin in apache which might help ?

Tks, Nag

Re: HP-UX 11.11 Differences

Steven E. Protter — Tue, 08 Mar 2005 11:14:37 GMT

Any number of things, including disk i/o can effect apache performance.

You seem to be narrowing things down. If that doesn't fix it, try the script set I attached. It lets you collect data over time for analysis.

SEP

Re: HP-UX 11.11 Differences

nag_5 — Tue, 08 Mar 2005 20:26:35 GMT

Hi,
No Luck with any of them. The starnge thing is we also have a i-Planet server running here and this server does not have any issues. It is only the Apache which is having issues.

is there any extensive loggin on apache i use to debug this issue ?

Moreover, this is not happening on a LOAD. i see that apache is taking more time to serve the requests. This is happening for every single request.

Tks, nag