HP Process Resource Manager User's Guide

Fine-tuning your PRM conﬁguration

Using prmanalyze to analyze your conﬁguration

Chapter 8164

Example: Locating system bottlenecks

The ﬁrst example shows how one might locate system bottlenecks and

ﬁne-tune a conﬁguration with the aid of prmanalyze special reports.

Many of the interactive users assigned to the group OTHERS have

complained that the system response time is terrible in the afternoons.

The administrator examines the summary reports generated by

prmanalyze, but sees nothing out of the ordinary. The administrator

then looks more closely at CPU resource use:

# prmanalyze -r cpu -1 -t hourly -s prmid myacct

The CPU hourly report, however, is normal. The OTHERS group is getting

plenty of CPU resources at all times. It has shares equaling 25%, but

never demands more than 15%. So CPU resources are not the problem.

Next, examine memory:

# prmanalyze -r mem -E -1 -t hourly -s prmid myacct

The memory report does show that OTHERS is peaking out on memory use

around 3pm. The administrator then generates the same memory report,

ﬁltering out the known applications:

# prmanalyze -r mem -E -1 -t hourly -x web_browser -x

financials -x mrkt_rsch -x sales_fcst myacct

sorting chronological events

hourly memory report by command name begins at Wed Jul 7 15:27:00 1999

ave KB mem threshold 0.01

unique id ave KB peak KB KB minutes % total

Jul 7 15:00 51976.33 1.725E+05 3.119E+06

mail_reader 1082.25 3.861E+03 6.494E+04 2.08

java 608.99 1.107E+03 3.654E+04 1.17

debugger 50031.32 1.678E+05 3.002E+06 96.26

This report shows a debugger application consuming almost all the

memory in OTHERS. This prevents other users from getting useful work

done. The administrator can use acctcom to ﬁnd the user running the

debugger. If this user is a developer trying to locate a bug in the sales

database program, change the user record to place him in the Sales