Comments on: SQL SERVER – Actual Execution Plan vs. Estimated Execution Plan

By: Yaqub Ahmad

Yaqub Ahmad — Thu, 17 Nov 2011 16:35:48 +0000

Great, short & compact information. Thank man!

By: Melkor

Melkor — Mon, 31 Oct 2011 21:42:36 +0000

Pinal Dave,
I have a different opinion
When everything goes awfully wrong (which it does), comparing the estimated plan vs. the actual plan usually gives me useful hints of where the query optimizer is screwing things up. I find this to be more useful (and more disturbing) when the estimated executions differ between the estimated and the actual plan. I give you that this situation doesn’t happen a lot (as far as I know it shouldn’t happen at all) but – believe it or not – it does.
That’s why checking BOTH plans may be necessary, and – humble opinion – that’s the reason they are BOTH there.
In any case, I use computers mostly to watch anime, and DB administration, Web Mastering and SOA programming are just an incidental hobby for me, so I don´t recommend anybody to take my opinions in account. In fact, I think nobody should read this.

By: Tharshi

Tharshi — Sat, 18 Jun 2011 16:29:30 +0000

How can use “display estimated query plan” and “Include actual execution plan” in MySQL?

Could anyone guide me how to achieve these two in MySQL?

By: madhivanan

madhivanan — Tue, 10 May 2011 12:44:41 +0000

It will show you Index Scan instead of Index seek

By: smart_dba

smart_dba — Tue, 10 May 2011 07:18:29 +0000

Hi Dave,

I like your forum and I have been referring it for the past 2 years.
My question to you is..
How can we find in an execution plan if a where clause is non-sargable(functions on columns) and it is not making use of the indexes.

Thanks in advance.

By: rajesh

rajesh — Thu, 14 Apr 2011 05:43:22 +0000

hi dave,

thanks alot for sharing a lot of information.

after the query is executed . it will show that 1 row(s) is effected (this is after the actual number of rows effected).

what for this is coming?
what is happening there?
can u please explain this?

this is when i am using actual execution plan in ssms.

Thanks in advance.

By: shp

shp — Sun, 06 Jun 2010 12:19:41 +0000

Can someone please tell me if I want to figure out difference the costs of actual and estimate executions around how much data records do I need to have? I have about 30 records but it does not show any difference?

By: Raj

Raj — Mon, 31 May 2010 11:05:45 +0000

Hi All,

Please can any one tell how to transfer the jobs through the script ?

By: Dmitry

Dmitry — Tue, 09 Mar 2010 13:06:23 +0000

Is it possible to get query plan by query?
for example in postgres it look like
explain select now();

but in ms sql i can’t find such a thing like explain.
thx.

By: Prasad Gelli

Prasad Gelli — Tue, 09 Feb 2010 08:37:57 +0000

Hi Dave

I like your articles and the way you share with us.

Adding examples also will be helpful for the readers.

Prasad

By: Ranjeet

Ranjeet — Fri, 05 Feb 2010 13:31:54 +0000

Hello Dave,

i am admire the way you are gving your effort here.

I use to go through your article and always found it usefull.

i will keep you writting on any topic of SQL Server

Ranjeet

By: Ashok

Ashok — Wed, 06 May 2009 05:28:22 +0000

Thank u friend for given usefull information provided abt Exec plan..

By: Muralikrishna Reddy

Muralikrishna Reddy — Mon, 23 Mar 2009 05:49:57 +0000

Very Good.

Lot of information provided.

By: SQL SERVER - Guidelines and Coding Standards Part - 2 Journey to SQL Authority with Pinal Dave

Thu, 26 Feb 2009 12:14:43 +0000

[...] Use graphical execution plan in Query Analyzer or SHOWPLAN_TEXT or SHOWPLAN_ALL commands to analyze SQL queries. Your queries should do an “Index Seek” instead of an “Index Scan” or a “Table Scan”. (Read More Here) [...]

By: SQLAuthority News - Best Articles on SQLAuthority.com Journey to SQL Authority with Pinal Dave

Tue, 24 Feb 2009 12:10:33 +0000

[...] SQL SERVER – Actual Execution Plan vs. Estimated Execution Plan [...]

By: Divya

Divya — Thu, 22 Jan 2009 09:48:59 +0000

You are great!

By: Shyam

Shyam — Tue, 02 Dec 2008 06:49:00 +0000

Dear Dave,
Thanks for the useful information..

Regards,
ShyamSundar.S

By: Gnans

Gnans — Wed, 19 Nov 2008 16:37:59 +0000

Gud one

By: SQL SERVER - Stored Procedure WITH ENCRYPTION and Execution Plan Journey to SQL Authority with Pinal Dave

Sat, 01 Nov 2008 19:03:19 +0000

[...] To understand this scenario let us create two SPs. First without encryption and second with encryption. Once SPs are created run them one by one with having Actual Execution Plan turned on. To learn how to turn on Actual Execution Plan read my previous article SQL SERVER – Actual Execution Plan vs. Estimated Execution Plan. [...]

By: Alkesh khedle

Alkesh khedle — Wed, 06 Aug 2008 08:27:26 +0000

Could you please tell me how we could recognize that the statistics are not updated by looking in to the actual execution plan of the query.
What is Bookmark Lookup and RID Lookup.What are the difference between them.Are the performance booster or performance Killer.How we can remove those from our query plan.

By: Anil

Anil — Wed, 18 Jun 2008 06:10:31 +0000

Hi,
Can i see execution plan for Stored Procedure and triggers.
Thanks

By: Krishna

Krishna — Thu, 17 Apr 2008 21:51:40 +0000

Dave,

Thanks for the useful information..

–Regards,
Krishna

By: jerome gerald

jerome gerald — Fri, 28 Mar 2008 09:53:56 +0000

HI Dave,

I was not aware of the 2 Execution Plans. After seeing yours only i got to know that there are 2 types.

Thanks

By: jerome gerald

jerome gerald — Fri, 28 Mar 2008 09:50:28 +0000

HI Dave,

I was not aware of the 2 Execution Plans. After seeing yours only i got to know that there are 2 types.

Thanks

By: Anil

Anil — Wed, 05 Dec 2007 18:26:56 +0000

Hi,

Is there any way to get execution time for stored procedure in sql server 2005.

My requirement was i have display that execution time as waiting time..so tht user will wait till tht time.