What does SQL Server trace flag 253 do?

Posted by kamens on Stack Overflow See other posts from Stack Overflow or by kamens
Published on 2010-04-07T23:27:00Z Indexed on 2010/04/07 23:33 UTC
Read the original article Hit count: 344

Filed under:

sql

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sql-server

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query-plans

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query-execution-plans

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trace-flag

In another question I was trying to research how to control SQL Server's query plan caches:

http://stackoverflow.com/questions/2593749/is-there-an-equivalent-of-optionrecompile-or-with-recompile-for-an-entire-c

...and I found trace flag 253 via this article:

http://www.sqlservercentral.com/Forums/Topic837613-146-1.aspx

The article is correct, if I run DBCC TRACEON(253) and then a number of queries, I can manually check the query plan cache and see that plans have not been inserted. If I run DBCC TRACEOFF(253), query plans are cached as normal.

So my question is...what else does this flag do? Does anybody know the official story?

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