Locks And Alerts

Nov 3, 2005

Hi,

I am having trouble with locks and performance issues in one application. The SQL server is specific to this application. What settings should i choose to set an alert to let me know when i get too many locks? the locks i am interested in ar ethe ones that show up in SQL EM. ie where a process is blocking another process(es).

I have tried New Alert | lock requests /sec but that is a huge figure when the server is running OK, so i cant guess what value to set for the counter. Is there a better object/counter i should use?

thanks
fatherjack

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SQL Server 2008 :: Row Locks Not Escalating To Table Locks After 5000

Jul 16, 2015

I've got an INSERT that's selecting data from a linked server and attempting to push 10 million rows into the blank table. More or less, it looks like this:

insert into ReceivingTable (
Field1, Field2, Field3, Field4
, Field5, Field6, Field7, Field8
, Field9, Field10, Field11, Field12
, Field13, Field14, Field15

[code]...

The instance of the SQL Server Database Engine cannot obtain a LOCK resource at this time. Rerun your statement when there are fewer active users. Ask the database administrator to check the lock and memory configuration for this instance, or to check for long-running transactions. There are no other active users. I ran it again and monitored the following DMO to watch the growth of locks for that spid:

SELECT request_session_id, COUNT (*) num_locks
-- select *
FROM sys.dm_tran_locks
--where request_session_id = 77
GROUP BY request_session_id
ORDER BY count (*) DESC

The number of locks started small and held for a while around 4-7 locks, but at about 5 minutes in the number of locks held by that spid grew dramatically to more than 8 million before finally erroring again with the same message. Researching, I can't figure out why it's not escalating from row locks to table locks at the appropriate threshold. The threshold in was set to 0 at first (Server Properties > Advanced > Parallelism > Locks). I set it to 5000, and it still didn't seem to work. Rewriting the INSERT to include a WITH (TABLOCK) allows it to finish successfully in testing. My problem is that it's coming out of an ETL with source code that I can't edit. I need to figure out how to force it to escalate to locking the entire table via table or server level settings.

A colleague suggested that installing service packs may take care of it (the client is running SQL Server 2008 R2 (RTM)), but I haven't found anything online to support that theory.

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Feb 9, 2000

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May 9, 2002

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I ignored this nice little feature till now, probably because mail configuration complexities. Now that we have DB mail, it has become very smooth.

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Any of you using, alerts for , other interesting events?


------------------------
I think, therefore I am - Rene Descartes

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Jun 20, 2006

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Dec 2, 1999

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Dec 4, 2002

Hi,
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Dec 14, 1998

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The SQLExecutive is running.
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May 4, 2001

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Hey guys,
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Is it even technically posibble?

Actually I am trying to develop an alert system that reads the database table periodcally, the data being read is a datetime, once it reaches the time, I need to send an sms to the person.


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Mar 22, 2004

I defined an Alert in Enterprise Manager for Severity 19 - Fatal Error In Resource. The alert is enabled, the type is "sql server event alert" and the alert is defined against a specific database. SQLSERVERAGENT and SQL Mail session are both started. I test the alert using the following statement in the specified database.

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hi
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Sincerely,

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Mar 7, 2001

Hello all,

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Nov 30, 2000

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Jun 3, 2004

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Newbie in DB administration.

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Aug 19, 2004

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Feb 27, 2002

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May 8, 2002

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any feedback would be appreciated.

Regards

Steve

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Dec 9, 1998

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Jul 10, 2006

Hi

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Regards

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Feb 6, 2007

Hello,

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Aug 15, 2012

We have occasional problems with transactional replication between 2 databases, and the problem is we dont notice right away. Usually the customer notices a few days after replication has stopped, and thats no good. We want to be notified as soon as there is any problem related to replication so we can go in and figure it out.

Ive been playing with the alerts, and it LOOKS like I should be able to do what I want, but after several hours I still cannot make any of the alerts work.

In my test environment, I'm forcing the following error, in order to try and test an alert: error 20598 "The row was not found at the Subscriber when applying the replicated command."

This seems to be one of our more common errors, and also its really easy to produce, so it seemed like a good candidate for testing the alert.

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Jun 18, 2008

What is the difference between - Alerts and Notification services?

------------------------
I think, therefore I am - Rene Descartes

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Oct 7, 2007


Hello everyone,

This is my first participation in this forum
In fact I am trying to prepare myself to earn MCITP and I faced few problems during setting up the following points
- SQL Server Database mail
- Alerts
- Operators

I want to create an internal process to inform me (via email and Net Send) if some errors happened or if some procedures run.

At the beginning I configured the Database Mail then I created new Operator (same name of domain account) and I checked all alert options (email, pager and net send) for this operator.

After that I created a new Alert (Raised based on Error Number) and I selected the created operator to be notified and I checked (email, pager and net send).
Right now everything is good and no problem in all above steps for me
But when the error raised the notification message shown at the operator screen,
But unfortunately nothing was sent to email

Note: I have a website (www.international-systems.net) with SMTP (mail.international-systems.net)
And I have created an email for this operation called (SQL_Server@international-systems.net) but nothing sent to the email
The configuration of my Database Mail was

Email Address: SQL_Server@international-systems.net
Display Name: Essam Binzghayo
Replay Email: SQL_Server@international-systems.net
Server Name: mail.international-systems.net
Port No: 25


Can you help me and try to answer the question
What was wrong in my configuration that caused failure sending email?

Thanks

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Jul 25, 2008

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Microsoft SQL Server 2005 - 9.00.3233.00 (X64)   Mar  6 2008 21:58:47   Copyright (c) 1988-2005 Microsoft Corporation  Enterprise Edition (64-bit) on Windows NT 5.2 (Build 3790: Service Pack 2)
 
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EXEC msdb.dbo.sp_add_alert
@name =N'Test',
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@delay_between_responses =0,
@include_event_description_in =0,
@wmi_namespace =N'.ROOTCIMV2',
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GO
 
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Apr 1, 2008

hi,

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how to fid out if any one help this...

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Feb 14, 2008

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Oct 7, 2002

Hello Guys,
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OR
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I dont know if the perfmon counter values are stored in any system files or not.

Please advise..

thank you in advance.

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