We have a way to delete the test reports over a given age. This clean-up process removes records over 30 days old by default, but is configurable.
For more information, please see Database Maintenance - DevTest Solutions - 10.2 - CA Technologies Documentation
We also have an equivalent for VSE metrics, that have the defaults shown below. Should you wish to override any of these then the properties should be added to your local.properties file
# These properties are used to control metrics collection in VSE servers. The metrics
# collected can be viewed in the web-based VSE dashboard. The values here are the defaults.
# Main property to turn overall metrics collection on (true) or off (false).
lisa.vse.metrics.collect=true
# This property controls the level at which transaction counts are recorded. Options are none
# (or false), service (the default), operation, or arguments.
lisa.vse.metrics.txn.counts.level=service
# This property controls how often transaction rate and response times are sampled.
lisa.vse.metrics.sample.interval=5m
# These properties control how often old metric data is scanned for and deleted, along with what
# counts as old.
lisa.vse.metrics.delete.cycle=1h
lisa.vse.metrics.delete.age=30d