HP-UX Workload Manager User's Guide

Configuring WLM
Tuning the metrics and the SLOs
Chapter 5210
Tuning the metrics and the SLOs
You can tune metrics and SLOs using tune structures. Among other
features, these structures allow you to specify the data collector and its
command-line arguments, the frequency at which WLM checks for new
performance data and adjusts CPU allocations, and the controllers’
variables.
There are three types of tune structures:
• Global structure
This tune structure applies to all metrics and SLOs. It does not
reference the name of any metric or SLO. It can be specified, at most,
once in the configuration file. Its syntax is:
tune {
[ wlm_interval = number_of_seconds; ]
[ absolute_cpu_units = {0 | 1}; ]
[ distribute_excess = {0 | 1}; ]
[ extended_shares = {0 | 1}; ]
[ transient_groups = {0 | 1}; ]
[ wlmdstats_size_limit = number_of_megabytes; ]
[ coll_argv = data_collector_and_arguments; ]
[ coll_stderr = file; ]|
[ cntl_smooth = smoothing_value; ]
[ cntl_avg = {0 | 1}; ]
[ cntl_kp = proportional_term; ]
[ cntl_convergence_rate = number_of_shares; ]
[ cntl_margin = margin_value; ]
[ cntl_base_previous_req = {0 | 1}; ]
}