Splunk - Purge events based on age

Purge event data older than 30 days in a specific index.

Update indexes.conf 

[my-index]

coldPath = $SPLUNK_DB/my-index/colddb

homePath = $SPLUNK_DB/my-index/db

thawedPath = $SPLUNK_DB/my-index/thaweddb

frozenTimePeriodInSecs = 2592000