slow interactive response of V-Class 2200

[Hubert Burkhardt]

Two weeks ago we installed a V-Class 2200 (16 processors) with HP-UX 11.0.
Everything seems to be fine. But the interactive response is extremely slow,
i.e. simple commands such as "ls" or "finger" take several secondes (> 5 sec)
to finish
as soon as one job (minimal I/O) is running.
Is there any possibility to configure this server to respond to user commands
as quickly as workstations do?
Thanks a lot for your answer.
- Hubert

[Robert Gamble_3]

I would suggest running sar, top, or Glance to see what is running/happening
when you experience these problems. That is not normal for any system, unless
under a considerable load.

Try searching the Technical Knowledge Base for similar problems.

Good Luck!

[Carlos Riera]

Hi:

after discard a heavy load on system, it sounds like a tunning problem.

I had same problem and after configurate more ninode and dbc_max_pct my system
responds faster.

In Tecnical Database (if i remember well) there is a whitepaper about
understanding tunnig, that is realy interesting.
Regards.

[Hubert Burkhardt]

Thank you very much for your answers.

What I learned from your answers is that the behavior of our V-Class is
unusual. Thus, the solution to my
problem must have been a bad configuration.

We use the machine as a technical server for big
fluid dynamical simulations. That's why I increased the kernel parameters
maxdsiz, maxssiz, maxtsiz, shmmax and their 64 bit equivalents. I set the 64
bit parameters to their maximum which obviously was nonsense. After reducing
their values the response of the V-Class improved.

- Hubert

[Randy Mather]

Sounds as though the filesystem is getting beat up.
Check and see if there is a find command running, or
see what the vxfsd process is doing. Turn the disk quota checking off.