HP-UX Workload Manager User's Guide

Advanced WLM usage: Using performance metrics
Configuring WLM for metric-based SLOs
Appendix H480
coll_stderr Is an optional tunable with a default value of /dev/null.
Specify this tunable in global or metric-specific tune
structures.
file Is either syslog (which corresponds to syslog on the
system through the logger command, typically
/var/adm/syslog/syslog.log) or the full path to a file.
For example, you can specify file in either of the following ways:
tune num_users {
...
coll_stderr = syslog;
...
}
tune load_average {
...
coll_stderr = /logs/load_average.stderr;
...
}
NOTE There are no restrictions on the file specified. However, specifying
system files or files created by applications on your system (such as the
WLM /var/opt/wlm/msglog and /var/opt/wlm/wlmdstats) is not
recommended as it can damage the files.
Smoothing metric values (optional)
Use the cntl_smooth keyword to get a running average of a metric from
a data collector, smoothing out dips and spikes in the metric before it is
used by WLM. Specify cntl_smooth using the following syntax:
cntl_smooth = smoothing_value;
where
cntl_smooth
Is an optional tunable that provides exponential
smoothing. Specify this tunable in global or
metric-specific tune structures.
smoothing_value