SqlServer-QA.net

Recently we have had problems on one of the database that is used on 24/7 basis where a ETL process to import and export millions of rows on few tables has been taking longer time to finish. Further the SELECT queires on reports are timed-out and smaller queries are taking more time to finish. First instance I thought REINDEXING would ...

Parameterizing T-SQL queries are a well-known task such as database programming and best practice in some tasks. It allows query plan reuse and eliminates the need of recompilation for multiple invocations of the same query that simply has different parameter values. However, there are times when parameterized queries might perform poorly, because ...

This was the question from SSP forums, I’m trying to rebuild few fragmented indexes on a table that is updated on regular basis. The “dbcc showcontig” gave this result: Table: 'Confidential' (999999999); index ID: 5, database ID: 5LEAF level scan performed.- Pages Scanned................................: 86- Extents ...

Recently we have seen a negative performance for a query that is running against a 500GB size of database, where AUTO UPDATE STATISTICS is enabled and we perform weekly reindexing on this database.  In addition to this I perform intermittent update statistics against set of tables that has frequently update/deletes. As usual I have ...

TEMPDB - though the name sounds like temporary database, it most important for any user database! Coming to performance tuning exercise or analysis you would go through Task Manager initially to see how system's  memory &  processor are coping up. Though they give initial picture of usage it is always better to go through by SYSMON ...