low performance

[Stanimir]

We have HP9000/879/K260, 1GB RAM, 2 CPU;
OS HPUX 10.20, Dbase ADABAS v.31116; Application - billing system, based on Natural v31111.
When we have more than 190 logged users,
in occasion of loading data to the application and dbase, we have noticed the performance
of system become low and response time
increase sensibly.
Does anybody have an idea how to improve the situation?

[RAC_1]

You have to monitor three things at first - memory,cpu and disk not necesseralrly in that order.

do top and check which processes are taking most of the CPU time.

if you have glance check memory usage and then glance to chekc disk activity.

You should get culprit here.
may be disk activiity or memory usage.