It’s quite helpful and you really are naturally very well-informed in this field.

You get popped our sight in order to numerous views on
this particular matter using intriquing, notable and solid content.

No record is wrong because because of a very minor mistake
TEXT LIKE ‘SELECT * FROM HumanResources.Shift%’

TEXT LIKE ‘%SELECT * FROM HumanResources.Shift%’

I need to know one thing is it possible to reuse any Execution Plan intentionally for any query again?

Its a bit late when I am stumbling on this blog. I hope that issue is resolved by now. Your memory settings look good. HOwever, the error is not very descriptive. Looks like a kernal memory type pressure.Each solution has to evaluated indivifually as one solution does not fit all similiar issues.

“pctfreemem is [ 2 ] threshold is 5 [ MEM - pctfreemem ]”

I have enabled the ‘optimize for ad hoc workloads’,1

though i am getting the memory issue. Installed RAM is 16GB and SQL Server Max server memory setting is 10240.

Please guide me to resolve this problem. Server is in production state.

This is bit urgent. Please guide me.

“pctfreemem is [ 2 ] threshold is 5 [ MEM - pctfreemem ]”

I have enabled the ‘optimize for ad hoc workloads’,1

though i am getting the memory issue. Installed RAM is 16GB and SQL Server Max server memory setting is 10240.

Please guide me to resolve this problem. Server is in production state.

my version of Sql server is following.

Can you please help in this?

Microsoft SQL Server 2008 (RTM) – 10.0.1600.22 (Intel X86) Jul 9 2008 14:43:34 Copyright (c) 1988-2008 Microsoft Corporation Enterprise Edition on Windows NT 5.1 (Build 2600: Service Pack 3)

This seem to be a change from when you ran your tests.

Good article. I will use this information to demonstrate to some co-workers.

I am using SQL Server 2008 Stnd on Windows 2008 Stnd.

the server had 4 GB memory and SS was using 3.5 GB
now we increased to 10 GB and SS is using 8.5 GB.

We want to know, out of 17 databases on the default instance, which one is using how much memory or which application is using more memory?
also
memory usage break-down by databases?

please reply ASAP as it is in production.

Thanks for your help and time.

Shoaib

It was interesting your material is really helpful

but the thing is in here

how to delete the cached plans used less than 2 times

i.e., I dont want to delete all cached plans only some of them.

Thanks for your post.
I have some comments.

The script (complete file) contains a bug. The statement “SP_CONFIGURE ‘optimize for ad hoc workloads’,0″ should be “SP_CONFIGURE ‘optimize for ad hoc workloads’,1″ otherwise the feature won’t be enabled.

The result of the second query is different for me, in fact it does return a row where cacheobjtype = “Compiled Plan Stub”.

The result of the third query is different for me, in fact it does return a row where usecounts is 4 and not 5 as you state. This would mean that when the query is run for the second time the “Compiled Plan Stub” is replaced for a “Compiled Plan”.

In SQL Server 20055 and earlier version the cached plan of ad hoc queries are cleared from memory only on memory pressure. Then SQl engine identify the cached plans that are least useful. This approach affect the performance of running job. In SQL Server 2008, the option “optimize for ad hoc workloads” implements a proactive approach to avoid memory pressure and improve memory utilization.

Regards,
Pinal Dave

Can you explain to me about this?

Nice article.

I have a stored procedure which is running fine in sql server 2000. But when i upgrade it to sql server 2008 it running for long time and never stopped execution. I tried to stop and rerun but no use.

Can you please let me know what action to be taken on this to get it run again. FYI the execution time for this SP in 2000 is about 60 mins.

And, Pinal I read your latest blog entry which you wrote today(26 Mar 08 – SQL Server – Fix : Error : Msg 15123….). Thanks once again.

Regards,

Pradeep Nair

I just tested it in SQL 2005 Standard 64 bit SP2

There is no “optimize for ad hoc workloads” option, if you just run SP_CONFIGURE to display all options

sp_CONFIGURE ‘show advanced options’,1
RECONFIGURE
GO

sp_CONFIGURE ‘optimize for ad hoc workloads’,1
RECONFIGURE
GO

gives me
Msg 15123, Level 16, State 1, Procedure sp_configure, Line 51
The configuration option ‘optimize for ad hoc workloads’ does not exist, or it may be an advanced option.

Regards,
Pinal

Thanks for the response. I am executing both the command together and separately. But I am still getting the same error. The first command “sp_CONFIGURE ‘show advanced options’, 1″ its running successfully and giving a response as “Configuration option ‘show advanced options’ changed from 1 to 1. Run the RECONFIGURE statement to install.”. But the second script is throwing the same error which I mentioned in my previous comment. Thanks.

Regards
Pradeep Nair

It is possible to run in SQL Server 2005 and it works fine. You need to turn on advance option first as I have suggested in the blog post.

sp_CONFIGURE ’show advanced options’,1
RECONFIGURE
GO

sp_CONFIGURE ‘optimize for ad hoc workloads’,0
RECONFIGURE
GO

Regards,
Pinal

Is it so that the following code runs only in SQL Server 2008, because when I am running this on SQL Express 2005 it giving error “Msg 15123, Level 16, State 1, Procedure sp_configure, Line 51
The configuration option ‘optimize for ad hoc workloads’ does not exist, or it may be an advanced option.”

sp_CONFIGURE ‘optimize for ad hoc workloads’,0
RECONFIGURE
GO

I checked in sys.configurations table under master db and there is no option such as ‘optimize for ad hoc workloads’ available over there.

Thanks
Pradeep Nair

Really very good digging. thanks for sharing this useful tip with us.

Ritesh Shah