SQL Stored Procedure Question?

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Hi,

What will happen if 1000 users trying to execute the stored procedure at a time?

How it will work? Single thread or multi thread or FIFO manner?

Posted 19-May-11 22:00pm

Toniyo Jackson

Updated 19-May-11 23:01pm

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CS2011 · Accepted Answer · 2011-05-19T22:09:00

Solution 1

There is no hard and fast rule for this. This depends on many criteria like what is database (i.e Oracle, DB2,Sql server etc ) and what is the operation performed inside the SP(insert/update or just a select). In case of select opration inside SP the SP may execute over multiple threads(this is where data base comes into picture) where as insert/update statements require exclusive lock on tables therefore this will always be FIFO.

Posted 19-May-11 22:09pm

CS2011

Comments

OriginalGriff 20-May-11 4:14am

Just about perfect! Beat me too it - 5!

[no name] 20-May-11 4:19am

Nice Call. My 5 too.

Toniyo Jackson 20-May-11 4:34am

Thanks CS. So, Is there any differences in performance when one user executing and multiple user executing the SP at a time? Here am using only SELECT statements.

CS2011 20-May-11 4:41am

Yes there will be some performance difference for sure but how much will again depends on the data base/Hardware of the server and number of result returned by your select statement (Inside the SP)

Toniyo Jackson 20-May-11 4:47am

Okay. Thanks CS. Then, how to solve the problem? I want same execution time if multiple users excuting also. Any solution?

CS2011 20-May-11 5:03am

what is the database you are using ?

Toniyo Jackson 20-May-11 5:04am

SQL Server 2008

CS2011 20-May-11 5:09am

Use Sql Server Profiler. More details @ http://msdn.microsoft.com/en-us/library/ms189070.aspx

Toniyo Jackson 20-May-11 5:11am

Thanks for the support CS. :)