SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Display Estimated Execution Time - Client Execution Time


Display Estimated Execution Time - Client Execution Time

Author
Message
mcertini
mcertini
SSC-Enthusiastic
SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)

Group: General Forum Members
Points: 100 Visits: 105
I am currently learing about query optimization. Can someone tell me how to interpret within "Display Estimated Execution Time" the "Client Execution Time". I just processed a simple query and the Client Execution Time was quoted at 16:50:30. I was concerned that it meant that my query would take 16 Hours, 50 Minutes and 30 Seconds. Though I haved searched for a while trying to find the interpretation, I finally decided to just run the query and see how long it took. The query took 3 minutes and 4 seconds. Now I am really confused. Can someone interpret this into English for me?
mcertini
mcertini
SSC-Enthusiastic
SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)SSC-Enthusiastic (100 reputation)

Group: General Forum Members
Points: 100 Visits: 105
Through further research I have found that the time represented by the "Client Execution Time" is the time in which the "Display Estimated Execution Plan" is ran. It is not any estimate of the amount of time in which it would take to execute the query.

So with all of that said, does anyone know how to find an estimated execution time for a query before it is actually ran for the first time?
Jeff Moden
Jeff Moden
SSC Guru
SSC Guru (222K reputation)SSC Guru (222K reputation)SSC Guru (222K reputation)SSC Guru (222K reputation)SSC Guru (222K reputation)SSC Guru (222K reputation)SSC Guru (222K reputation)SSC Guru (222K reputation)

Group: General Forum Members
Points: 222648 Visits: 42003
To the best of my knowledge, no such tool exists. Certainly, not an accurate one. Even the actual execution plan is frequently wrong when comparing things such as % of Batch.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
sstrayer-927918
sstrayer-927918
Grasshopper
Grasshopper (18 reputation)Grasshopper (18 reputation)Grasshopper (18 reputation)Grasshopper (18 reputation)Grasshopper (18 reputation)Grasshopper (18 reputation)Grasshopper (18 reputation)Grasshopper (18 reputation)

Group: General Forum Members
Points: 18 Visits: 20
Client Execution Time is the time you ran the query.
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search