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What is syspolicy_purge_history

When  we  installation or upgrade Sql Server  from a previous version  into 2008, by default a job will be created syspolicy_purge_history.

 
What does it do?


Sql Server 2008 introduced a new feature called Policy Based Management. 

For example, one could define a policy that says all tables must have a clustered index. 

Once defined, the policy can be evaluated against targets to check for compliance. Each evaluation of compliance will be recorded in below tables :-
1. msdb,
2. syspolicy_policy_execution_history_details_internal, 
3. syspolicy_policy_execution_history_internal, and 
4. syspolicy_policy_category_subscriptions_internal 

The evaluation condition is built on top of object facets, which is predefined by Microsoft.The purpose of that job, syspolicy_purge_history, is to remove records in those tables to maintain so it does take up space unnecessarily


Happy Readding.
@Sumnjha

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