Performance Analytics regularly
collects scores from your data on an ongoing basis. When you first set up Performance Analytics for an
application, or when you create new indicators or indicator sources, run historical data
collection to collect scores on your existing data. Historical data collection enables
you to analyze data that existed prior to setting up Performance Analytics.
historical data collection job deletes any previously collected data for the periods
and the indicators that the job covers. It does not delete data from outside that
date range or for other indicators.
Historical jobs also collect snapshots
of the existing data. Performance Analytics snapshots
are the lists of records (sys_ids) that are collected at the
time that the scores for those records are collected. A snapshot is made only for
indicators with Collect records selected.