Starting WLM

Before starting WLM (activating a configuration), you may want to try the configuration in passive mode, discussed in “Seeing how WLM will perform without actually affecting your system ”. Otherwise, you can activate your configuration by logging in as root and running the following command, substituting your configuration file’s name for config.wlm.:

# /opt/wlm/bin/wlmd -a config.wlm

When you run the wlmd -a command, WLM starts the data collectors you have specified in the WLM configuration.

Although data collectors are not necessary in every case, be sure to monitor any data collectors you do have. Because data collection is a critical link in the effective maintenance of your configured service-level objectives, you need to be aware when a collector exits unexpectedly. One method for monitoring collectors is to use wlminfo slo.

For information on creating your WLM configuration, see the section “Creating a configuration file”.

WLM automatically logs informational messages to the file /var/opt/wlm/msglog. In addition, WLM can log data that allows you to verify WLM management as well as to fine-tune your WLM configuration file. To log this data, use the -l option. This option causes WLM to log data to /var/opt/wlm/wlmdstats. The following command line starts WLM, logging data for SLOs every third WLM interval:

# /opt/wlm/bin/wlmd -a config.wlm -l slo=3

For more information on the -l option, see the wlmd(1M).