Processor Utilization Question

Sep 20, 2007

I have a data mining app that does a series of select statements (no inserts). I'm noticing an odd occurance where if I start up 4 copies of the app on a quad core machine - sql takes full advantage of the 4 cores for a few minutes and then drops to 75% utilization - the other 25% is on the idle process. Two of the apps appear to be sharing a single proc of sql as each of their throughputs is cut by 50%. If I then start a 5th copy of the app, the machine is brought to full 100% utilization - two of the apps continue to appear to share a proc. SQL is set up to use all procs and I have even tried select the priority boost to no effect.

Any ideas how to ensure full sql utilization with the same number of apps as cores?

thanks,

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Jun 13, 2007

Is it possible to know the processor utilization and memory usage of a single database in a SQL server?

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Jan 30, 2004

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Right now I can produce this by executing two very similar T-SQL selects. The one that runs on the server only has one additional join - a very simply join at that. If I can change my SQL to make it run client side in some situations, that would be VERY HELPFUL!

Thanks in advance!

Ryan

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Mar 13, 2008



We are seeing that the %Processor Time for the sqlservr process in Perfmon is over 100%. I am trying to understand how can the percentage of use be over 100%, and why it is over 100%. Someone told me that if the machine has multiple processors, that it will be over 100%. If that is the case, how can I determine what the maximum and normal values are? If I have 4 processors, does that mean 400% is the max? Does not make sense since it is suppose to be a percentage value...


Could someone explain to me how the CPU Utilization value is being measured, and if it is going over 100%, why that is and how I can determine what the threshold should be for monitoring?

SQL 2005 on Windows 2003 cluster.

Thanks!

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Nov 26, 2007



I am running a query on a SQL Server 2005 database and encounter the following error message


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There is a join between a table on the 2005 database and another on a 2000 database. I have run DBCC CHECKTABLE and found no errors on the two tables.

Anybody with ideas?

Thanks

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May 24, 2007

SQL Server 2005 9.0.3161 on Win 2k3 R2



I receive the following error:



"Error: 8624, Severity: 16, State: 1 Internal Query Processor Error: The query processor could not produce a query plan. For more information, contact Customer Support Services."



I have traced this to an insert statement that executes as part of a stored procedure.



INSERT INTO ledger (journal__id, account__id,account_recv_info__id,amount)

VALUES (@journal_id, @acct_id, @acct_recv_id, @amount)



There is also an auto-increment column called id. There are FK contraints on all of the columns ending in "__id". I have found that if I remove the contraint on account__id the procedure will execute without error. None of the other constraints seem to make a difference. Of course I don't want to remove this key because it is important to the database integrity and should not be causing problems, but apparently it confuses the optimizer.



Also, the strange thing is that I can get the procedure to execute without error when I run it directly through management studio, but I receive the error when executing from .NET code or anything using ODBC (Access).

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Jul 16, 2001

Hi All,
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How can i find such information from my box ?

Can anyonw help with this stat's ? !!

Thanks in advance

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May 2, 2005

Hi all,
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thanks
Andrew

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Feb 12, 2004

Hi All,

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Is there any ways thru which I can clear this data ( cpu column in sysprocesses table) after I have captured it in a table ?

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Thanks.

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Jul 20, 2005

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SQL 7 SP2

Hi.

True or false on these:

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Question: Will the PK index be used in determining the result set ?

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Thanks,

Craig

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Sep 5, 2002

I am getting high CPU utilization on the SQL Server process (>90%).
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Sep 6, 2006

I have windows 2003 server with SQL Server installed on it for live calls billing but the CPU utilization is reaching the maximam and it's average above 60% which is causing lot of problems specially for the live environment. I have enough memory and free hard disk space is more than 40GB,

so where is the problem?!

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Jul 20, 2005

What do people think is normal for memory utilization? I know that's toobroad, so here are some basics.MS SQL Server 2000, Windows 2000 Server, 2GB RAMDb 1, size = 2.0 GBDb 2, size = 300MBDb 3, size = 50MBDb 4, size = 30MBDb 5, size = 30MBTypically 4-6 users, moderate usage 8-hrs/day. Performance has not slowed.Reboot on Sunday. sqlservr.exe in the Task Manager reports the followingSun 61MBMon 200MBTues 800MBWed 1,124MBThu 1,424MBFri 1,303MBI was getting srv 2020 errors when I had just 1 GB RAM: "The server wasunable to allocate from the system paged pool because the pool was empty."Then I did several updates to address this and got more RAM. I haven't seenthe errors since, but I haven't waited for them to happen: I'm rebootingevery week now. The memory numbers make me suspect SQL Server.Scratching my head. Not sure if my problem is gone, and this is normal SQLServer 2000 behavior, or if my problem is still lurking and I've only mutedit a bit.Any thoughts greatly appreciated.Tom

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Sep 6, 2006

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Apr 19, 2007

Dear all,



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Regards

Mohd Sufian

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Oct 17, 2006

Could anyone help me in finding out why the cpu utilization is very high??

I have two servers say, Server A , server B. There is a transactional replication going on from server A to B

There is a table say Table A on server A, which is being replicated to server B.

I created a trigger insert and update trigger on Table A on server B (i.e. on subscriber). Since then, the CPU utilization for server B is very high 80-90%

when i used profiler, i could see .whenever replication stored proc for insert or update executes..cpu utilization goes up..

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Could anyone tell me why the cpu utilization has gone up so much?? i am using sql server 2005

thanx





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Jun 3, 2008

Hi

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thanks in advance,

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Sep 27, 2001

I have a few in house developed application (VB based) that access the SQL server for adding, appending , creating tables. The application does the changes thru queries dynamically generated at the application level.

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Jdindian

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Aug 1, 2006

I created an indexed view in SQL 2000, and I expected to see the index created on the view referenced in the execution plan when I query the view. Instead, I see the index for the base table referenced in the execution plan. Why?

There are 6,000,000+ records in the base table, and the view only references 256 of these rows.

Here is some of the DDL if you need it:

CREATE TABLE [alarm_t] (
[ct_dtm] [datetime] NOT NULL ,
[dst_flg] [char] (3) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[stn_nm] [varchar] (10) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[alarm_txt] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[utc_dtm] [datetime] NOT NULL ,
[create_utc_dtm] [datetime] NOT NULL
) ON [PRIMARY]
GO

CREATE CLUSTERED INDEX [alarm_idx2] ON [dbo].[alarm_t]([ct_dtm], [stn_nm], [dst_flg]) ON [PRIMARY]
GO

create view dbo.alarm_Mapbd_v with schemabinding
as
SELECT
[ct_dtm],
[dst_flg],
[stn_nm],
[alarm_txt],
[utc_dtm],
[create_utc_dtm]
FROM [dbo].[alarm_t]
WHERE[stn_nm]= 'Mapbd'
GO

create unique clustered index alarm_Mapbd_idx1 on dbo.alarm_Mapbd_v
( stn_nm, ct_dtm, dst_flg )
go

update statistics alarm_t
go
update statistics alarm_Mapbd_v
go

The following 2 queries have the exact same execution plan, both showing a cost of 50%. I expected to see the index created on the view referenced in the execution plan for the first query. Is the index created on the view being used?

selectstn_nm, ct_dtm, dst_flg
fromalarm_Mapbd_v
go
SELECT
[ct_dtm],
[dst_flg],
[stn_nm],
[alarm_txt],
[utc_dtm],
[create_utc_dtm]
FROM [dbo].[alarm_t]
WHERE[stn_nm]= 'Mapbd'
go

Thanks for your assistance.

Tom

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Feb 12, 2007

Environment: Win2003 SP1, 32 bit, SQL Server 2K5

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Canada DBA

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Jan 2, 2007

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Aug 3, 2007

Hello

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Thanking You
Navaneeth

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Nov 27, 2007



I'm having a problem with one of my SQL servers (2000 Build 8.00.2140) where it is always reading CPU utilization of 70-100% (more often pegged at 100%).

I have an exact same SQL server running at a different location on a much less powerful (hardware wise) server that gets more traffic but only shows 7-21% CPU utilization.


Taskmgr shows Process sqlservr.exe as consuming all the resources. This is a dual 2 core 3.66Ghz (4 real CPUs) with 4GB RAM and 5 x 146 15K SCSI drives hooked up to a $1200 SCSI contoller (Dell server). RAM usage is pretty low, most I've seen is 1GB.


Is there any way to determine what specific connection/thread is causing this? Any diagnostic tools or anything that can show me specifically what is consuming this SQL server? Connection thread or anything that points back to a specific IP?

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I have multiple instances of SQL 2012 Std Edition on a 40 physical core server.What I have done is the use the Process - SQLServr -% Processor time Stat and divided by 16 ( the max number of Cores Std ed. can use) as a instance level measure. I also use processor object stats to show how busy the server is. How to represent the servers CPU utilization?

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Jan 16, 2007

HI
I am facing a strange problem with SQL Server 2005 . The CPU utilization with SQL Server 2005 is higer by about 70% comapared to SQL 2000.

In the same kind of Hardware and with the DB server up , I performed the following tests
Declare @i int
Set @i = 10
While @i < 100000
Begin
Insert into arup_emp values(@i,'M',0)

Set @i = @i + 1
end


The CPU utilization average on SQL 2005 was 45% and on SQL 2K it was just 25% , I am seeing a lot of people who seems to be facing this problem but unfortunately not seeing any solution to this.

Can anyone through some light .
Please note that I have tried to also see the MAXDOP options, but get the same results.

Please help.

Thanks
Arup

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Aug 29, 2007

I was tuning a query testing out SARG with these two queries:

select col1 from table1 (nolock) where col1 like '#,%ABC%' or col1 like 'BC,%ABC%'
select col1 from table1 (nolock) where col1 like '%ABC%'

I flushed out the cache, added an index to col1, then ran those two together. Provided below are the actual query plan and stat time:

Query 1: Query cost (relative to the batch): 0%
select col1 from table1 (nolock) where col1 like '#,%ABC%' or col1 like 'BC,%ABC%'
----------------------------------------------------------------------------------------------------------------------------
SELECT Index Seek
Cost:0% <------- [DB1].[dbo].[table1].[Idx..]

Cost: 100%


Query 2: Query cost (relative to the batch): 100%
select col1 from table1 (nolock) where col1 like '%ABC%'
----------------------------------------------------------------------------------------------------------------------------
SELECT Index Scan
Cost:0% <------- [DB1].[dbo].[table1].[Idx..]

Cost: 100%

------------------------------------------------STAT TIME-----------------------------------------------------------
SQL Server parse and compile time:
CPU time = 0 ms, elapsed time = 1 ms.

SQL Server Execution Times:
CPU time = 0 ms, elapsed time = 1 ms.
SQL Server parse and compile time:
CPU time = 0 ms, elapsed time = 7 ms.

(3 row(s) affected)
Table 'table1'. Scan count 2, logical reads 2932, physical reads 0, read-ahead reads 18, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.

(1 row(s) affected)

SQL Server Execution Times:
CPU time = 938 ms, elapsed time = 943 ms.

(3 row(s) affected)
Table 'table1'. Scan count 1, logical reads 2927, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.

(1 row(s) affected)

SQL Server Execution Times:
CPU time = 515 ms, elapsed time = 505 ms.
SQL Server parse and compile time:
CPU time = 0 ms, elapsed time = 1 ms.

SQL Server Execution Times:
CPU time = 0 ms, elapsed time = 1 ms.

------------------------------------------------STAT TIME-----------------------------------------------------------

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Oct 21, 2007

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Dell Power Edge 1800 with 3.00 GHz Xeon Processor 800 FSB, 1 GB of RAM
Dell Power Edge 1600 with 2.80 GHz Xeon Processor 533 FSB, 1 GB of RAM

Combined into one:
Dell Power Edge 2950 Dual Core 1.6 GHz Xeon Woodcrest Processor, 4 GB of RAM


However, the CPU utilization on this new server is maintaining at about 90% with 3.82 GB of RAM used as well. It's a Windows Server 2003 R2 x64 edition running SQL Server 2005 SP2 x64. I have searched around Microsoft's website for any information that could be of help to me, but I was unable to locate anything. I was hoping that someone could provide some insight as to why this might be occuring. Or if this is a known issue.

Thanks,
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Srinath
DBA
Reid & Taylor
Mysore, India

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Hi,

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Has anyone experienced this kind of a behaviour?

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PK



















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