http://sqlinthewild.co.za/index.php/2008/04/23/execution-plans-important-properties/ A discussion on SQL Server Mon, 14 May 2012 23:51:41 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://sqlinthewild.co.za/index.php/2008/04/23/execution-plans-important-properties/comment-page-1/#comment-54 Gail Fri, 23 Oct 2009 10:13:55 +0000 http://sqlinthewild.co.za/index.php/2008/04/23/execution-plans-important-properties/#comment-54 The costs are unit-less values. They're a measure of how expensive the optimiser thinks that the operator/plan will be. It's based on expected time, estimated memory requirements, estimated IOs, estimated CPU time required and a couple other things The costs are unit-less values. They’re a measure of how expensive the optimiser thinks that the operator/plan will be. It’s based on expected time, estimated memory requirements, estimated IOs, estimated CPU time required and a couple other things

]]> http://sqlinthewild.co.za/index.php/2008/04/23/execution-plans-important-properties/comment-page-1/#comment-53 Gail Tue, 05 May 2009 13:11:17 +0000 http://sqlinthewild.co.za/index.php/2008/04/23/execution-plans-important-properties/#comment-53 Off hand, I'm not sure. I'll look into it. Off hand, I’m not sure. I’ll look into it.

]]> http://sqlinthewild.co.za/index.php/2008/04/23/execution-plans-important-properties/comment-page-1/#comment-52 Hans Brouwer Tue, 05 May 2009 12:52:20 +0000 http://sqlinthewild.co.za/index.php/2008/04/23/execution-plans-important-properties/#comment-52 Very interesting all this. Question here: I have noticed the values on Estimated I/O cost, Estimated CPU cost, and-so-on. What do the values mean?! Dollars, Euros, cycles, electrons?!? I've never seen a decent explanation on this. Very interesting all this. Question here: I have noticed the values on Estimated I/O cost, Estimated CPU cost, and-so-on. What do the values mean?! Dollars, Euros, cycles, electrons?!?
I’ve never seen a decent explanation on this.

]]>