HP WebQoS Peak for HP-UX Concepts and Operation Guide

Chapter 5 51

HP WebQoS Peak for the Apache Web Server

Integrating HP WebQoS with the Apache Web Server

Example 5-1 Sample Output from the top Command

System: web_server Wed Apr 22 10:41:59 1998

Load averages: 1.45, 1.46, 1.78

149 processes: 145 sleeping, 3 running, 1 stopped

Cpu states:

LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS

1.45 100.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%

2. If IDLE is greater than zero, then set the threshold to

(100 - IDLE)/100.

If IDLE equals zero, then set the threshold to the ﬁrst listed load

average.

Using the above sample output, you would set the load threshold to

1.45.

Run top when performance is poor, and when it is acceptable to

determine an acceptable load threshold.

Ending Sessions A session duration can be set with the

HPACSessionDuration directive. The default for this directive is “0.” For

example to set a session to 3600 seconds, use the following directive in

your conﬁguration ﬁle:

HPACSessionDuration 3600

The duration of a session is speciﬁed in seconds. If the duration is set to

0, the session never expires. If a session exceeds the speciﬁed duration, it

is ended.

A session can also be terminated if the time interval between two

successive requests of a session exceeds a set number of seconds. You can

set this time interval with the HPACIdleSessionTimeout directive. The

default for this directive is “300” seconds. For example, to set the time

interval to 120 seconds, use the following directive in your conﬁguration

ﬁle:

HPACIdleSessionTimeout 120

NOTE Termination of a session means that the next request coming from the

same user agent will start a new session. All privileges that the old

session might have enjoyed are lost.