My telnet session is freeze

[david_974]

Hi,
I have my server rp2470, with 2 650MHZ processors and 3GB ram memory. This is my database server and this have installed informix and i have 230 users conected to this server.
Sometimes, my session telnet is freeze because this is very slow, but not only on my pc, on some users pc too.
If i go to the server console, the console is very slow too.
If i check the performance of my server, the %cpu load is 70%, but sometimes when the load is 80% or 90% this problem not happen.

Somebody can tell me, what happen with my telnet and console session and how i can resolv this?
Somebody can helpme, please?
Thanks.

[Geoff Wild]

Is it swapping?

Check kernel parameters like dbc_mac_pct (default is 50% of ram) you want it to work out between 450 and 800 MB of ram.

With 3GB of ram, dbc_max_pct of 20 or 25% should be fine.

Post a vmstat -S 2 10

You can also get memdetail program from my post in this thread:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=938769


Rgds...Geoff

[david_974]

One question, what for is this parameter? dbc_mac_pct

Thanks,
David

[Geoff Wild]

Thats the dynamic buffer cache - HP-UX uses it to allocate space in memory for caching to disk.

Default is 50% - which is too high for most systems today (IE - if you have more then 2 gb of ram).

Rgds...Geoff