Purging vCenter task & event logs from VCDB hosted on external SQL server.

Hi,

The vCenter database is full which is causing vpxd service to stop automatically that results in a complete shutdown of vCenter access through Web Client. Reference logs as below

vCenter Version:  6.5.0.20000 Build 9451637

vpxd.log
---------
2019-08-15T15:03:44.787+05:30 info vpxd[33172] [Originator@6876 sub=vpxdVdb] WarningThreshold: 80% ErrorThreshold: 95%.
2019-08-15T15:03:44.787+05:30 error vpxd[33172] [Originator@6876 sub=vpxdVdb] Insufficient free space for the Database (used: 96%; threshold: 95%)
2019-08-15T15:03:44.788+05:30 info vpxd[33172] [Originator@6876 sub=Main] ** BEGIN SERVICES ** (time to active: 10246 ms)

Now we managed to create some space on the DB and started the vpxd service. We have check that the task & event is taking the maximum space on the vCenter database as the retention policy is set to 730 days. My question is, what if we decrease the retention period for task & event in vCenter? Can it auto delete/ purge  the records from Database or do we have to execute some manual commands? Got an article related to the same Purging old data from the database used by vCenter Server (1025914).. Kindly advice.

Thanks

Jasmeet Singh