Checkpoint Process

Apr 12, 2007

I see a line in sys.sysprocesses. The process's status is suspend and the command is CHECKPOINT. I have the information here exactly as it is on my monitor. It seems is consuming hi cpu. What should I do?
[/code]
spid: 10
kpid: 7416
block: 0
waittype: 0x0081
waittime: 232546
lastwaittype: CHECKPOINT_QUEUE
waitresource:
dbid: 1
uid: 1
cpu: 427046
physical_io: 36695
memusage: 0
login_time: 2007-04-04 10:01:32.787
lastbatch: 2007-04-04 10:01:32.787
ecid: 0
open_tran: 0
status: suspended
sid:0x0100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
hostname:
program_name:
hostprocess:
cmd:CHECKPOINT nt_domain:
nt_username:
loginame: sa
[/code]

Canada DBA

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CHECKPOINT Backgroup Process

Apr 16, 2008

Hello,

I am DB Developer (not admin), excuse me if this is a silly question.

I don't know much about CHECKPOINT background But I feel, this process is slowing down performance of my sps which runs slower than normal in some cases.

Especially when I see any of my process goes in the suspended mode and its wait type is SLEEP_BPOOL_FLUSH and CHECKPOINTs process is also suspended and its wait type is CHECKPOINT_QUEUE.

More important anything else is... this background process (which I always find its spid is 11) BLOCKS all other user processes when it goes into suspended mode and its wait type is SLEEP_BPOOL_FLUSH

I dont know my analysis is correct (claiming checkpoint as culprit), need experts advice and help

can someone give info on checkpoint and how this effect server performance

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Dec 5, 2006

I have an SSIS solution with 8 packages in it. I have checkpoint turned on with the 'If Exists' option. Each of the 8 packages have 8 separate checkpoint files specified.

One out of two runs will fail with one of the below errors:

The checkpoint file \xxxxxxxx is locked by another process. This may occur if another instance of this package is currently executing.

Checkpoint file \xxxxxxxx failed to open due to error 0x80070020 "The process cannot access the file because it is being used by another proces


I have checked all the settings and everything looks fine, looks like the problem is when you have many Control Flow tasks in a package and if two of them are completed at the same time and they try to write to this file one of them is unable to write and it fails.

This is causing the entire job to fail even though the control flow was successful.

Anyone encounter this issue? Any assistance is appreciated.

Thanks!

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Can i force a checkpoint?How?Will it have any implication?
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Please help.

I would like to checkpoint my transaction log every night before full backup.
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I run SQL Server 2K SP 3 on WIN 2K SP 3.

Thank you.


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Nov 14, 2007



Hi,

I was trying to extract data from the source server using OLEDB Source and SQL Server Destination when i encountered this error:

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Hello all,
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FCB:pen: Operating system error 32(The process cannot access the file because it is being used by another process.) occurred while creating or opening file 'C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLDataTest.mdf'. Diagnose and correct the operating system error, and retry the operation.
and it also logs
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Dear list
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Jan 30, 2007

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Mar 20, 2008



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WorkingDirectory : C:Program Files (x86)Microsoft SQL Server90COM
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The customer.bat file will have the following code:
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With 2005 SP1. Have built a SSIS package that successfully saves a checkpoint file and sometimes successfully restarts. (I've also built some others that are 100% reliable).

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On a successful restart the failed step reexcutes and everything works fine.

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Has anyone seen this behaviour before?

 

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Any ideas?

 

 

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hi everyone,

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Hi All,
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Feb 23, 2006

I have a situation where I need to make sure a task executes regardless of whether the package starts from a checkpoint or not. Is this possible?

Here's the scenario:

I have a package with 3 tasks {TaskA, TaskB, TaskC} that execute serially using OnSuccess precedence constraints.
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TaskA is insignificant here.
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So, I need to be able to execute TaskB again, even though it was TaskC that failed. Currently the package restarts from TaskC which reuses the raw file (which has the bad data in it) so the package continues to fail even though the cause of the problem has been fixed.

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Regards

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Mar 3, 2008



There is a bug in SSIS2005 concerning the way that checkpoint files behave in concert with Sequence containers. It is documented (at length) here:


Is it possible to execute a container regardless of the checkpoint file?
(http://forums.microsoft.com/msdn/showpost.aspx?postid=1574262&siteid=1&sb=0&d=1&at=7&ft=11&tf=0&pageid=0)



Is anyone from Microsoft yet able to give a definitive answer to whether this will be fixed or not in Katmai? A yes or no answer would be very very much appreciated.



Regards
Jamie

[Microsoft follow-up]

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Aug 18, 2006

Hi,

I have a problem where my packahe isn't restarting from the point of failure and I'm tryig to understand why not.



The following line came from the checkpoint file:

<DTS:Container DTS:ContID="{36A685E1-049A-4E6C-9884-AADF8BE29577}" DTS:Result="0" DTS:PrecedenceMap="" />

Can anyone explain:

What DTS:Result & DTS:PrecedenceMap are used for?
What values can DTS:Result contain and what do they mean? [Today I have only seen "0".]
What values can DTS:PrecedenceMap contain and what do they mean? [Today I have only seen "Y" & "".]

Thanks

Jamie

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