To manage the accumulation of production data, InterSystems IRIS enables users to manage the database size by periodically purging the data. This purge can apply to messages, logs, business processes, and managed alerts.

Please check the documentation for more details on the settings of the purge task:
https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=EGMG_purge#EGMG_purge_settings

An issue that many users ran into is still finding old messages after running the purge task for messages.For example, a user has a purge task for messages that has NumberOfDaysToKeep=45.

The complex record mapper can help you process text file data consisting of various types of records to persistent messages in IRIS. To gain a basic understanding of the complex record mapper and see an example implemented in the production, check out the learning services video below:

https://community.intersystems.com/post/video-using-complex-record-mapper

This article is going to help troubleshoot when you see <Method DOES NOT EXIST> when handling record objects. For example, when purging messages in the production, you might see errors that indicate issues when deleting certain records:
<METH