Hello All, I run a select query to see its speed. It took around 5 seconds. Now i run the same query simultaneously twice usng two instances of the client tool. It took 10 seconds for both the queris to complete. Its not 5 secs + 5 secs. Both the queries were running till 10 secs when i saw using mytop. In the 11th sec both the queries ended. Running it thrice simultaneously, it took 15 secs for all the three queries to complete.
In such a case should this query be considered as slow? We are actually checking for queries which take longer than 12 secs and regarding such queries as slow. The moment we find such a query, a mail is sent to the DBA saying that the query is slow. So in a day there are more than 400 such slow query notifications flowing into the mail box. My questions are, Should the simultaneous queries take so long? Should'nt both queries have finished by 6 secs rather than 10 secs? Is this a right strategy to track slow queries? Any suggestions would help. Thanks, Ratheesh K J
