Use dsconfig to change the maximum time information about generated alerts retained in the alerts backend. After this time, the information is purged from the server.

Note:

The minimum retention time is 0 milliseconds, which immediately purges the alert information.

This example shows a command to modify the alert retention time to 2 weeks.
$ bin/dsconfig set-backend-prop --backend-name "alerts" \
  --set "alert-retention-time: 2 weeks"
View the property using dsconfig:
$ bin/dsconfig get-backend-prop --backend-name "alerts" \
  --property alert-retention-time
Result:
Property : Value(s)
---------------------:---------
alert-retention-time : 2 w