Autoshrink Option Causes Deadlock

Mar 1, 2001

Hi,

I had a DTS task running which was doing an insert (over 17.5 million rows) in a database for which the auto shrink option was enabled.

After a few hours I noticed that the insert was blocking the autoshrink.

Since I didn't want to kill my insert, I tried to kill the autoshrink from the query analyzer, but when trying to do so I got the message that only user processes can be killed.

Does anyone have similar experiences? Should you consider enabling the autoshrink option or is this just trouble?

Stef

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Nov 10, 2015

Is there a way to send out an email woth deadlock information (victim query, winner query, process id's and resources on which the deadlock occurred) as soon as a deadlock occurs in a database or at instance level?I currently has trace flag 1222 turned on. And also created an alert that send me an email whenever a deadlock occurs. but it just says that a deadlock occurred and I log into sql server error log and review the information.

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Jan 11, 2001

Hello,

Ran the Andrew Zanevsky script to shrink the Tran log, this works great, but say the log gets shrinked to 30MB, I then expand it to 40MB, then sometime within a 24 hour period it magically gets reset to 30MB. The database is a standalone DB, and is on SQL7 SP1 the script I ran can be found @ http://www.pinnaclepublishing.com/sq/SQMag.nsf/WebIndexByIssue/F36C151BD80FAD8F852568D0007799BE?open.
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Aug 2, 2007

Howdy folks!

I've got a database that needs to run 24/7. I'm looking into maintanence options and wanted to run the following by y'all:

Ok, I've read the MSDN "Maintaining databases" article and noticed the following statement about autoshrinking: "This technique uses almost no processor time and memory". I also searched these forums and found that many users say autoshrinking heavily lags down sql transfers. So who's right? And if it does lag transfers, by how much?

Another question I have about autoshrink is fragmentation. It would seem to me that over time solely depending on autoshrink would cripple a server in terms of fragmentation; is this the case?

Also, does autoshrink (or manual shrinking or compacting) update the statistics?

Final question!!! I'm programming in native c++, is there a way for me to run commands such as "DBCC SHRINKDATABASE" in native OLE DB code?

Thanks!

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May 9, 2002

Details: MSDE 1.0 / SP4 - Windows 2000 Pro

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Does anyone have any benchmarks for the amount of overhead caused by autoshrink of the log and having autostats enabled? We have a customer that insists that turning off these options was necessary to eliminate a performance problem they were having (Query timeouts), but we are not convinced that these two options would have generated enough overhead to have been the root cause (they also rebuilt all their indexes and made some other unspecified changes that more likely solved the problem).

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3. How to you change the default make of the model database?

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Hi All

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I am unable to control the granularity of locks in our queries.
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The batch includes two inserts and one select query - all are hitting on
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Within the batch, I have given a table hint to set transaction isolation level
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and the same for the Select statement.

SELECT retail_price, price_status_id FROM ib_price with (READCOMMITTED,ROWLOCK)

When I run sp_lock on the spid, I get output indicating that
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Hi,

I am getting deadlock running a stored procedure from two machines. Looking at the error log (generated using trace flag 1204 and 3605), it seems the deadlock is on a key. But what I fail to understand is how come sql server granted exclusive lock on the key to both connections. The grant list shows that lock with Mode X is granted to both connection.

Deadlock encountered .... Printing deadlock information
2002-11-04 14:34:26.33 spid4
2002-11-04 14:34:26.33 spid4 Wait-for graph
2002-11-04 14:34:26.33 spid4
2002-11-04 14:34:26.33 spid4 Node:1

2002-11-04 14:34:26.33 spid4 KEY: 11:1205683443:11 (da00d1f77328) CleanCnt:1 Mode: X Flags: 0x0
2002-11-04 14:34:26.33 spid4 Grant List::
2002-11-04 14:34:26.33 spid4 Owner:0x2ffa89c0 Mode: X Flg:0x0 Ref:0 Life:02000000 SPID:179 ECID:0

2002-11-04 14:34:26.33 spid4 SPID: 179 ECID: 0 Statement Type: SELECT INTO Line #: 44
2002-11-04 14:34:26.33 spid4 Input Buf: Language Event: EXEC dbo.PROC_RVM_CALCULATE 22567, 'centreAVashista'
2002-11-04 14:34:26.33 spid4 Requested By:
2002-11-04 14:34:26.33 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:166 ECID:0 Ec:(0x6f02568) Value:0x85146480 Cost:(0/14E0)
2002-11-04 14:34:26.33 spid4

2002-11-04 14:34:26.33 spid4 Node:2
2002-11-04 14:34:26.33 spid4 KEY: 11:1205683443:11 (df001773794a) CleanCnt:1 Mode: X Flags: 0x0

2002-11-04 14:34:26.33 spid4 Grant List::
2002-11-04 14:34:26.33 spid4 Owner:0x85147ee0 Mode: X Flg:0x0 Ref:0 Life:02000000 SPID:166 ECID:0

2002-11-04 14:34:26.33 spid4 SPID: 166 ECID: 0 Statement Type: SELECT INTO Line #: 44
2002-11-04 14:34:26.33 spid4 Input Buf: Language Event: EXEC dbo.PROC_RVM_CALCULATE 22562, 'centreJTtest4'
2002-11-04 14:34:26.33 spid4 Requested By:
2002-11-04 14:34:26.33 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:179 ECID:0 Ec:(0x7dd0568) Value:0x3a24f920 Cost:(0/39BC)
2002-11-04 14:34:26.33 spid4 Victim Resource Owner:
2002-11-04 14:34:26.33 spid4 ResType:LockOwner Stype:'OR' Mode: S SPID:166 ECID:0 Ec:(0x6f02568) Value:0x85146480 Cost:(0/14E0)

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Parallel Query worker thread Involved in deadlock.

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Hi

Sorry for bombading the forum with all these questions, but i am relatively new to sql 2000.

I am getting dead lock on the following procedure.

important background information
1. this is a multi user web-based call centre application
2. this procedure loads up a new contact based on priority

I see no reason how a dead lock could occur.
does any one have any idea. could it be something else that is locking up resource used by this procedure?


CREATE PROCEDURE topcat.getNewContactInfo
(
@contact_id int
)
AS
BEGIN
begin transaction

declare @id int

set @id = (SELECT TOP 1 _id FROM class_contact WHERE (status IS NULL OR status='New Contact' OR status = 'No Connect' OR status='callback') AND (checked_in IS NULL OR checked_in <> 1) AND (callback_date >= (getdate() + 1) OR callback_date IS NULL ) ORDER BY priority DESC)

UPDATE class_contact SET checked_in = 1 WHERE _id = @id
SELECT TOP 1 * FROM class_contact
WHERE _id = @id

commit
END
GO



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James :(

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=============================
http://www.sqlserverstudy.com

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Help With Deadlock

Jul 20, 2005

HiI have a deadlock situation and I am trying to debug my Trace Log. How do Ifind out what is the cause ?I can see from the trace I have an exclusive lock on a RID, but how can Ifind out what/where 'RID: 7:1:431830:13 ' is ?RegardsSteve:TraceLog2003-08-20 15:15:45.28 spid4Deadlock encountered .... Printing deadlock information2003-08-20 15:15:45.29 spid42003-08-20 15:15:45.29 spid4 Wait-for graph2003-08-20 15:15:45.29 spid42003-08-20 15:15:45.29 spid4 Node:12003-08-20 15:15:45.29 spid4 RID: 7:1:431830:13 CleanCnt:1Mode: X Flags: 0x22003-08-20 15:15:45.29 spid4 Grant List 0::2003-08-20 15:15:45.29 spid4 Owner:0x193e3400 Mode: X Flg:0x0Ref:0 Life:02000000 SPID:52 ECID:02003-08-20 15:15:45.31 spid4 SPID: 52 ECID: 0 Statement Type: UPDATELine #: 442003-08-20 15:15:45.31 spid4 Input Buf: RPC Event: ams_Load_Stock;12003-08-20 15:15:45.31 spid4 Requested By:2003-08-20 15:15:45.31 spid4 ResType:LockOwner Stype:'OR' Mode: USPID:55 ECID:0 Ec:(0x1A0DF5A0) Value:0x193e1800 Cost:(0/E58)2003-08-20 15:15:45.32 spid42003-08-20 15:15:45.32 spid4 Node:22003-08-20 15:15:45.32 spid4 RID: 7:1:431830:14 CleanCnt:1Mode: X Flags: 0x22003-08-20 15:15:45.32 spid4 Grant List 1::2003-08-20 15:15:45.32 spid4 Owner:0x193e3360 Mode: X Flg:0x0Ref:0 Life:02000000 SPID:55 ECID:02003-08-20 15:15:45.32 spid4 SPID: 55 ECID: 0 Statement Type: UPDATELine #: 522003-08-20 15:15:45.34 spid4 Input Buf: Language Event: DECLARE @RCintDECLARE @strResult varchar(8)DECLARE @strErrorDesc varchar(512)EXEC @RC = [msmprim].[msm].[ams_Populate_PSM_Stockrequest] @strResult OUTPUT, @strErrorDesc OUTPUTDECLARE @PrnLine nvarchar(4000)PRINT 'Stored Procedure: msmprim.msm2003-08-20 15:15:45.34 spid4 Requested By:2003-08-20 15:15:45.34 spid4 ResType:LockOwner Stype:'OR' Mode: USPID:52 ECID:0 Ec:(0x198A5558) Value:0x193e2e80 Cost:(0/94)2003-08-20 15:15:45.35 spid4 Victim Resource Owner:2003-08-20 15:15:45.35 spid4 ResType:LockOwner Stype:'OR' Mode: USPID:52 ECID:0 Ec:(0x198A5558) Value:0x193e2e80 Cost:(0/94)

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Here is the exception I am getting, any idea why this might be happening:
 
Exception: ThisMethod is done: let this go: Exception:    
Transaction (Process ID 74) was deadlocked on lock |
communication buffer resources with another process and has been chosen as the deadlock victim.
Rerun the transaction.    Stack Trace:     at

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