Annotation process tools build performance issue

Question

Annotation process tools is taking 85 minutes to compile page flow files. Is there any suggestion to improve performance.

Answer 1

As you probably already have gathered, you have different execution plans in the two environments. There could be different reason why this happens, for instance different profiles of the data. But more likely it is due to that in the slow environment, the
plan was built from some atypical set of input parameters, which causes a performance issue when the procedure is run in a normal fashion.
When you say that the query has a lot of isnull and convert functions I get a little worried. If it is only in the SELECT list, it's not evil, but if functions are used in the WHERE or ON clauses, the query might benefit from a review, and possibly also
the data model. But this is pure speculation at this point.
I would suggest more than one course of action. As a short-term solution, you run UPDATE STATISTICS WITH FULLSCAN on all tables involved, as out-dated statistics can also be explanation for why you got a bad plan. New statistics should trigger a recompilation.
But even if this resolves the issue, it may not be feasible in the long run, because the events indicate that the query is sensitive to something and the bad plan could come back any day. For this reason, it might be a good idea to make sure that the query
does include inappropriate constructs, and you also need to review that there are good indexes in place.
Erland Sommarskog, SQL Server MVP, [email protected]