Performance Tuning

Hello All,

 I am trying to understand slow sql server \tuning sql server. Our production server is SQL Server 2012(standard edition).

We have configured MDW in the server. MDW reports shows the query which takes largest CPU as

CREATE PROCEDURE sys.sp_MSget_repl_commands ,create procedure sys.sp_replmonitorhelppublisher  ,create procedure sys.sp_MSenumchangesdirect on resourcedb to be executing more number of times rather than any other user stored procedure.

We have 5 transactional replication and 5 merge replication configured on this server.Transactional replication is configured to run continuously.

Is this a normal behaviour? Or do I need to change any settings in replication configuration?

Thanks