What Happens If Affinity Mask And Affinity I/O Mask Are Not Mutually Exclusive?
Jan 21, 2008
I have a dual 64 bit quad core server with 16 GB of memory. We are going to run an application server and SQL Server 2005 SP2 CU4 64 bit on this hardware, but we only want to purchase a single CPU license for SQL Server. The obvious choice is to use the affinity settings to prevent SQL Server from using one of the CPUs.
Initially, the development team simply went into SSMS and unchecked affinity mask and affinity io mask for the first four processors. This appeared to work fine in their testing. A problem arose when we started monitoring the maintenance plan and saw that the database integrity check was failing. The root problem was this invalid state that the affinity masks were in.
I have seen a lot of documentation stating the SQL Server will ignore an invalid mask setting, but in our testing, it appears that SQL Server respects the setting. For example, when we set CPU 7 to be available for processing and IO, Performance Monitor showed that only CPU 7 was used during a load test.
So from our preliminary testing, it looks like SQL Server will use a single CPU for both processing and IO if you tell it to. Is there some other reason why these affinity settings need to be mutually exclusive? Is there a test I can run that can illustrate why?
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Sep 17, 2007
I'm experiencing some problem with the affinity mask and affinity I/O mask configuration.
We are running SQL Server Enterprise Edition 2005 64bit on Windows 2003 Server 64bit with 4 dual core CPU. The actuelly configuration is:
Affinity Mask Affinity I/O Mask
CPU0 0 0
CPU1 0 0
CPU2 1 1
CPU3 1 1
CPU4 1 1
CPU5 1 1
CPU6 1 1
CPU7 1 1
We did it so, because we are running LiteSpeed Tool for the backup. LiteSpeed is configured to use CPU0 and CPU1.
Now, we know that the settings are wrong. If Affinity mask is 1 affinity I/O mask should be 0 and vice-versa.
My question is: how many CPU should I enable for affinity mask and how many for affinity I/O mask. Which are the correct criterias.
Thx in advence.
Laurent
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Nov 17, 2007
We are having a problem with one of our SQL servers, and in comparing it to the backup server which is working fine, I noticed some differences. I attempted to correct the differences, but no luck.
The dell server has 4 dual-core processors and at one point hyper-threading was enabled. One of our DBAs recommended that it be turned off. We didn't have any major problems until recently and it seems that getting this setting right is the lynchpin. Any suggestions?
John
EXEC sys.sp_configure N'show advanced options', N'1' RECONFIGURE WITH OVERRIDE
GO
EXEC sys.sp_configure N'affinity mask', N'0'
GO
EXEC sys.sp_configure N'affinity I/O mask', N'0'
GO
RECONFIGURE WITH OVERRIDE
GO
EXEC sys.sp_configure N'show advanced options', N'0' RECONFIGURE WITH OVERRIDE
GO
-----------------------------------------
Configuration option 'show advanced options' changed from 0 to 1. Run the RECONFIGURE statement to install.
Msg 5832, Level 16, State 1, Line 1
The affinity mask specified does not match the CPU mask on this system.
Msg 15123, Level 16, State 1, Procedure sp_configure, Line 51
The configuration option 'affinity mask' does not exist, or it may be an advanced option.
Msg 15123, Level 16, State 1, Procedure sp_configure, Line 51
The configuration option 'affinity I/O mask' does not exist, or it may be an advanced option.
Msg 5832, Level 16, State 1, Line 1
The affinity mask specified does not match the CPU mask on this system.
Configuration option 'show advanced options' changed from 1 to 0. Run the RECONFIGURE statement to install.
Msg 5832, Level 16, State 1, Line 1
The affinity mask specified does not match the CPU mask on this system.
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Aug 7, 2014
I ran ALTER SERVER CONFIGURATION SET PROCESS AFFINITY CPU = 2,3 that means the SQL server 2012 is using the 2nd and 3rd CPU's respectively..
Now, when I run sp_configure 'affinity mask' I get the config_value as 12, so how it is getting calculated?
is there a code for each CPU?? wanted to know about this.
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Aug 29, 2006
Hi All
Can u pls tell me How to Get the SQL Affinity Mask value in Sql 2005.
and what is the table/views name that store this info.
for SQL 2000 , we were using following query:
SQLStatement.printf("select c.value from master..sysconfigures c, master..spt_values v,"
"master..syscurconfigs r where v.type = 'C' and v.number = c.config and v.number >= 0 "
"and v.number = r.config and v.name ='affinity mask'");
lErrCode=SQLExecDirect(hStmt,(SQLCHAR*)pszSQLStatement,strlen(pszSQLStatement));
lSQLBindCol(nAffMask);
But With SQL 2005 , we are getting ZERO(0) ROWS SELECTED.
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May 10, 2004
I have a table into which users can enter a To and From range, and an application returns all the values in between. Naturally the users can enter to and from values that don't exist, as all they need to do is satisfy a "between" expression. eg they can enter '1100' to '1399' and even though neither value actually exists in the data, the query will return all the values that fall into the desired range.
However the application now demands a bit more of a sophisticated approach. The target data may have the form 'nn-nnnn-nn' where n is '0' to '9', and the user wants to select all the values (in pseudo-code) which satisfy a pattern like '%-7040-%' and '%-7400-%'
A simple LIKE expression with a mask containing a RegEx won't work - ie LIKE '%-7[0-4][0-4]0-%' doesn't work because (eg) '00-7150-00' won't satisfy the mask because of the 5 falling outside [0-4], although it is within the range I want.
I have come up with a solution to this problem by using MIN and MAX aggregate functions on LIKE [From] and LIKE [To] respectively and this works fine. eg
"SELECT A.<something> from <target_table1> A, <table_with_ranges> B WHERE A.<something> BETWEEN (SELECT MIN(X.<something>) FROM <target_table1> X WHERE X.<something> LIKE B.[From]) AND (SELECT MAX(X.<something>) FROM <target_table1> X WHERE X.<something> LIKE B.[To])"
It's actually quite a bit more complicated than that - I have simplified the SQL a bit, but that is the basic algorithm.
The problem is that for the BETWEEN expression to work, both the MAX and MIN functions have to return a value that is not NULL- ie there has to be a value in the target table which satisfies the mask. In the application, this is not always going to be the case - Users will want to create large ranges to allow for future growth so every time they enter new data into target_table1 the don't then have to go out and redfine the [From] and [To] ranges to satisfy the new data. What I really need is an SQL expression along the lines of "SELECT .... FROM ... WHERE A BETWEEN <pattern1> AND <pattern2>" where <pattern1> and <pattern2> contain wildcards.
Anyone got any suggestions??? By the way, using SUBSTRING or other string functions is NOT an option for a variety of reasons.
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Jan 9, 2007
Hi everyone,
Primary platform is 2005 under 64-bit.
I'm trying to figure out what does 'Processor Affinity' and 'I/O Affinity' means when you're viewing server properties. We've got eight processors.
Thanks for your comments,
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Jul 23, 2005
Ive been playing with this for a few days and thought I might thow itout for seggestions.I have Several Queries that need counts returnedThe Queries are Mutually Exclusive meaning whatever Query they returnin first they cannot be included in the counts of any queries belowthem.This set of queries for exampleSelect ID From Customers where FIRST_NAME = 'Chris' (would return say150)Select ID From Customers where ST='OH' (This would retunr say 50, BUTRun alone it might return 70, however 20 of those were in the firstQuery so they arent to be retunred in this result set.The total for Bot Queries would be 200But If I reverse it like soSelect ID From Customers where ST='OH' (This now returns 70)Select ID From Customers where FIRST_NAME = 'Chris' (This now returns130)The total of course for BOT Queries is 200 but I dont need that total Ineed the total for EACH Query depending on its orderingWhat I need are the single counts depending on the order in which thequeries are runIt seems like a recursion problem, but It might go past 32 level so Icant use recursive SQL ( I dont think )I've thought of (or tried to think how to use Not In, Not Exist, etcbut still dosent come up with the results....)How Can I grab the counts for each Query ?Chris
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Mar 21, 2007
I have recently upgraded my databases from SQL 2000 to 2005. In 2000, I could set the network affinity so that sql server was only accessible from one of the two network cards. I cannot find how to do this in sql 2005. Is there a way?
In my installation, I have two network cards in each server. The "A" network adapter connects to the "A" hub, and the "B" adapter connected to the "B" hub. Traffic on trhe "B" hub is my private, non-routable network, This is where I want the SQL Server traffic to run. The A hub traffic is the public network. This gives me the ability to isolate SQL Server from the outside world.
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Jan 7, 2005
Hello Friends,
I'm trying to set affinity to mssearch.exe in our Windows 2000 Advanced
server (4cpus), but i am getting an "Access denied error". I checked the login which has administrator rights to the box.
It would be a great help if anyone can tell how to fix this.
Thanks
Haja
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Oct 22, 2015
We are currently looking at consolidating 10 servers into one cluster server.
Some servers may be busier than others. Is there any reason to split them up and give the busy databases specific CPUs or is it always better to have them on one instance?
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Aug 21, 2015
On NumaNode1 and NumaNode3. I can see all of the CPU's there but the checkboxes are disabled.
What could be disabling these?
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Sep 26, 2007
Hi i have a table in my database and i want to mask or encrypt a particular column in it? How can i do it.
Any help will be appreciated.
Regards
Karen
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Nov 12, 2007
-- Prepare sample data
DECLARE@Sample TABLE (ID INT, NetworkIP VARCHAR(15), SubnetMask VARCHAR(15))
INSERT@Sample
SELECT1, '192.168.1.0', '255.255.255.128' UNION ALL
SELECT2, '10.1.1.64', '255.255.255.240' UNION ALL
SELECT3, '172.16.11.0', '255.255.255.252'
-- Show the expected output
SELECTID,
NetworkIP,
SubnetMask,
dbo.fnIsInRangeIP('192.168.1.5', NetworkIP, SubnetMask) AS IsInRange
FROM@SampleAnd here is the function codeCREATE FUNCTION dbo.fnIsInRangeIP
(
@IP VARCHAR(15),
@NetIP VARCHAR(15),
@MaskIP VARCHAR(15)
)
RETURNS BIT
AS
BEGIN
RETURNCASE
WHENCAST(PARSENAME(@IP, 4) AS TINYINT) & CAST(PARSENAME(@MaskIP, 4) AS TINYINT) = CAST(PARSENAME(@NetIP, 4) AS TINYINT) & CAST(PARSENAME(@MaskIP, 4) AS TINYINT)
AND CAST(PARSENAME(@IP, 3) AS TINYINT) & CAST(PARSENAME(@MaskIP, 3) AS TINYINT) = CAST(PARSENAME(@NetIP, 3) AS TINYINT) & CAST(PARSENAME(@MaskIP, 3) AS TINYINT)
AND CAST(PARSENAME(@IP, 2) AS TINYINT) & CAST(PARSENAME(@MaskIP, 2) AS TINYINT) = CAST(PARSENAME(@NetIP, 2) AS TINYINT) & CAST(PARSENAME(@MaskIP, 2) AS TINYINT)
AND CAST(PARSENAME(@IP, 1) AS TINYINT) & CAST(PARSENAME(@MaskIP, 1) AS TINYINT) = CAST(PARSENAME(@NetIP, 1) AS TINYINT) & CAST(PARSENAME(@MaskIP, 1) AS TINYINT)
THEN1
ELSE0
END
ENDE 12°55'05.25"
N 56°04'39.16"
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Dec 20, 2007
Hello
I'm using the ForEach File task and masking the files I want to process as ABC??.TXT.
It all works well until I drop a file there like ABC12 Copy.TXT, which I don't expect to be process, but the loop still picks it up. Am I using the wrong wildcards?
newstar1860
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Sep 26, 2007
How can i encrypt or mask a column in the database?
Any help will be appreciated
Regards
Karen
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Aug 20, 2006
sorry for my question, maybe it seems un professional but I need to know the answer,
is it possible to enter the data in a sql table in a specific format and how it could be?
for example I want to have a mask in the table to enter the data in this format ##.## so it will not accept any other data to be typed in without this format.
Regards
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Mar 28, 2006
Hello, I have this Access 2K query that I need to re-create in MS SQLServer 2000, so I'm using the Query Analyzer to test it.One of the Access fields stores the home phone number. In the Accessquery, if the phone number is null, it fills it up with zeroes"000000000." If the phone has an input mask, it only gets the 9 numbers(area code included) and if the phone number's good (all numbers) thenit leaves it alone. That Access query is using immediate ifs toaccomplish that task.Does anyone have any idea how to copy this behavior into SQL Server2000? I've using the CASE statement but so far my code is not correct.I get stuck in the input mask. This is the Access code:HomePhone:IIf(IsNull([HomePhone]),"0000000000",IIf(Left([HomePhone],1)="(",Right(Left([Homephone],4),3)& Right(Left([Homephone],9),3) & Right([HomePhone],4),[HomePhone]))Thanks for all your help.JR.
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Sep 29, 2006
I have the following t-sql syntax
problem is masking information after like as special characters.
I will search for all entries in column filedirectory which begins with \
DECLARE @cmd varchar(255)
SET @cmd = 'SELECT id,name,filedirectory FROM MR_ReqPro.RQDOCUMENTS WHERE FILEDIRECTORY LIKE ' \%' '
print @cmd
EXEC master.dbo.xp_sendmail @recipients = 'kalleOO7@web.de',
@query = @cmd , @subject = 'Fehler', @message = 'Fehler :', @attach_results = 'TRUE', @width = 2000
Thx
Kalle
here is the solution
DECLARE @cmd varchar(255)
SET @cmd = 'SELECT id, name, filedirectory FROM MR_ReqPro.RQDOCUMENTS WHERE filedirectory LIKE ''\%'' '
print @cmd
seems to work :-)
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Sep 24, 2004
I have statement which is comparing a smalldatetime column to literal string as follows:
sales_date ='21-9-2004 0:0:0.000'
when I run the statement in query analyzer it bombs out with:
Server: Msg 296, Level 16, State 3, Line 1
The conversion of char data type to smalldatetime data type resulted in an out-of-range smalldatetime value.
If I alter the format of the date literal to '2004-09-21 00:00:00' the statement works.
Is there anyway of forcing the statement to treat '21-9-2004 0:0:0.000' as '2004-09-21 00:00:00' without modifying the statement itself ?
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Mar 12, 2007
AnupG writes "hi,
the most common feature that any RDBMS provides should be that if we want to store the data in the MSSQL tables then the data should be presented in masked/formatted like for eg.the password text in field should be like "*****". I am using SQL 2000 but i unofrtunately i couldn't find any such feature in defining the data type in SQL server 2000 ...?"
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Jul 20, 2005
Hi,DDL:-- create table #task (taskID int identity(1,1) primary key, taskNamevarchar(25) unique, taskCompleteDate dateTime, taskComplete bitdefault(0));/*Business Rules:a) if taskCompleteDate is NULL (like default) then, taskComplete maynot be set to 1 (attempt to update it to 1 would fail);b) else automatically set taskComplete = 1*/I was thinking using CHECK constraint (mutual constraint if possible),along the following line:CHECK (if taskCompleteDate is null set taskComplete=0 else settaskComplete=1)Hmm, your thought?Thanks.
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May 21, 2003
Hi,
When I open an application, it prompts me for a message that SQL is locked in exclusive mode by other application.
How to solve this?
thanks in advance
christine
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Jan 30, 2004
Is there a way to do a logical exclusive OR (XOR) in sql server?
I'm trying to do this in where clause, something like:
WHERE
(not exists (select 1 from table a where a.date > '01/30/03') XOR
exists (select 1 from table a where a.date < '01/30/03'))
Thanks!
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Jun 11, 2008
Hi,
How do you lock a table in exclusie mode before running a query?
thanks,
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Oct 17, 2007
A problem about many to many relationships from an SQL beginner. Here's a contrived abstract example, as I'd prefer not to give away specifics.
Imagine I have two tables: users, food
The relationship (to like) is many-to-many so I've got a link table, which might look like the below:
andrew, apples
bob, banana
bob, apples
chris, carrots
chris, apples
chris, banana
I want to select users who like bananas and apples exclusively.
The answer should be 'bob' ONLY. select * from users inner join food on <IDs> where food in ('bananas','apples') isn't suitable , because it'll also return 'chris' who should be disqualified (because he also likes carrots).
Apart from potentially being bad DB design (although this is an abstract example; I do have ID numbers), can anyone suggest how to get this in a scalable way?
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Aug 9, 2000
Anybody know how a SELECT statement can generate an exclusive lock on a table ?
I always thought that SELECT's take out shared locks. Is this something to do with temporary tables generated by ORDER BY's and DISTINCT ?
Rogue SQL below (from Site Server).
SELECT A.i_Dsid, A.i_Aid, A.vc_Val, A.i_Val, A.dt_Val, A.img_Val FROM Object_Attributes A, ( SELECT DISTINCT L.i_Dsid FROM Object_Lookup L , Object_Attributes OA2 (index = IND_vc_Aid) WHERE ((( L.i_ObjectClass = 9999 )) AND ( OA2.vc_Val LIKE ( '999999999.9999999%' ) AND OA2.i_Aid = 99)) AND (L.i_Container_Dsid = 99) AND ( OA2.i_Dsid = L.i_Dsid )) AS B WHERE B.i_Dsid = A.i_Dsid AND A.i_Aid NOT IN( 1, 2, 3, 4, 5 ) ORDER BY A.i_Dsid, A.i_Aid
Can anybody suggest a workaround ? Thanks.
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Feb 5, 2003
Hi,
i need to run a restore of a database overnight onto a different server using the live data .bak file. however the job failed on the first run (last night) with the error:
"Exclusive access could not be obtained because the database is in use. ...."
how do i gain this Exclusive use via an SQL statement please?
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Jul 12, 2004
Hi.
I need to access a database to modify, updates,... massively . It's possible to lock a database and have exclusive access?
(SQLServer 2000)
thanks.
Francisco
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Feb 11, 2004
I have created a SQL Agent job that is supposed to essentially duplicate a production database to another database. The code I am using is:
step1
__________________________________________________ ______
declare @sql varchar(8000)
set @sql=''
select @sql=@sql+'kill '+cast(spid as varchar)+char(13)+char(10)
from sysprocesses where dbid=12
--Print (@SQL)
exec(@sql)
step2
__________________________________________________ ________
RESTORE DATABASE HIWDYNARPT FROM PRDBACKUP
WITH REPLACE
__________________________________________________ ______
This works when I test it during the day, however when it runs at night I get the following error in the job log:
Database in use. The system administrator must have exclusive use of the database to run the restore operation. [SQLSTATE 42000] (Error 3101) Backup or restore operation terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed.
I'm not sure why this happens because I have killed all open threads in step 1, and then create my own new thread in step two. Maybe someone else is initiating a new thread to quickly between the steps???
Anyway, I am trying to use:
__________________________________________________ __
ALTER DATABASE HIWDYNARPT
RESTRICTED_USER
WITH ROLLBACK IMMEDIATE
__________________________________________________ ____
...as an alternative to the T-SQL killing PID's, but SQL 7.0 SP4 does not seem to support restricted user like 2000. It keeps giving me a syntax error. Does anyone have any suggestions?
If I bring step 1 and step 2 together, separated by "GO", could this fix the problem?
Thanks in advance!
Ryan Hunt
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Dec 8, 2007
Could anybody give a lead as to what I can do get rid off this error please.
I alread tried following:
use master
go
Alter Database dbname set single_user with rollback immediate;
go
Still have the issue. SQL 2005 Server actually did lock the db.
So ran
Alter Database dbname set multi_user;
go
and refresh Query and it switch back to multi user.
But I can't restore db yet.
Thank you
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Jan 4, 2008
Are Intent exclusive locks compatible with rowlock?
I am getting a deadlock since i have ix lock on a page and another process(select query) is trying to acquire a shared lock.How can i solve this?
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Sep 10, 2007
Hello All!
I want to perform 4 or 5 statements as a transaction but I need to make sure that during this complete transaction no one else inserts or deletes records from a table named SomeTable.
So how can I lock MyTable at the beggining of the transaction so that during my transaction no one else can insert or delete anything in table SomeTable?
Thanks!
David
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