Monthly Archives: July 2012

Job History Is Missing

I ran into an interesting issue this morning after upgrading to SQL 2012 that I did not know existed. I had a job fail for various reasons and was alerted like normal of the failure. Upon going to the SQL agent to view the history of the job I found nothing in the history – which I thought was odd. I decided to hop over to the sysjobshistory table and sure enough my history was all there as expected. So what is the correlation? Why was my job history in the table but not being shown in the view history on the agent?

I  noticed a message on the bottom left where the status and progress sections are in the properties section of the Log File Viewer for the job – the message read “The given key was not present in the dictionary”. Upon doing some research it so happens that a known bug was discovered with special characters in job names. In my job, for whatever reason, it had a “,” in the name of it. In digging some more I could find only the term “Special Characters” was being thrown about, but I could not find a specific listing of what special characters…was it 1,2,3 or all?

Once I removed the “,” from the name and re-ran the job upon completion the history itself was re-populated in the agent with no issues.

I decided even further to test this out; I put the comma back in the job and then scripted the job out to see if it would error, to my surprise it did not error out. I would have expected it to error on script creation due to the comma; I guess that the bug runs a bit deeper than I initially thought.

Microsoft has responded that this will be resolved in the next SP release of 2012; I figured if anyone else runs across this that the information might help.

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Which Publication Are My Tables In

Ever been in a deployment situation where the deployment script breaks due to a table being replicated? I have – many times. Hopefully this tidbit of information will help you in your future deployments.

When I receive a scheduled or even a non scheduled deployment I like to prep for it so I don’t have any surprises at the actual time of deployment. I use Red Gates SQL Compare tool for my deployments; whatever your mechanism is the methodology is similar.

Table A is being replicated from the publisher down to a reporting environment lets say; Table A has a modification to some part of the schema. If Table A is being replicated you will receive an error on deployment stating that the table is being “published” for replication.

What I like to do is review the schema before hand; I have a pretty good working knowledge of what I am replicating over but I also deal with 17 publications that house various amounts of tables and I might not be able to recall where all the tables are in what publications.

In order for me to figure this out quickly I use the following script. I do not have a use statement at the beginning; however I do run this in the specific database that I am deploying to:

SELECT sps.name
FROM syspublications sps WITH ( NOLOCK )
JOIN sysarticles sas WITH ( NOLOCK ) ON sps.pubid = sas.pubid
WHERE sas.name = ‘tablename’ –change to your table name

By running the above script it will allow you to find what publication the table is being replicated in. From there you can script out the drop and create statements for the publication and continue on with your deployment.

Recompile Option – Yes, No, Maybe?

This seems to be hot topic right now among my peers here locally and even abroad ~ To Recompile or Not to Recompile that is the question at hand.

I’ve been associated with companies in the past where utilizing this option is almost a standard; then I’ve been with companies to where it was never used at all. What is my personal preference?  I don’t use the option all of the time but I do have some use for it in my daily checks of the systems I monitor.

My two real world examples I just ran into not long ago are some simple ones but thought I would share……..

  • I kept on having some issues with a stored proc and I knew that what I was troubleshooting was off kilter and wasn’t adding up in my head on what I was seeing in some of the results. In diving into the query of course I saw the recompile option which of course told me that anything in my plan cache I should just throw out the window……I love using my DMV’s and what not; however on a recompile each time a proc is used puts a damper on my assessments at times. There is a trade off when using the recompile option to improve performance, just something to keep in mind.
  • One aspect I do use the recompile option for is my diagnostic queries of my environments. Prime example: I’m a fan of Glenn Berry’s Diagnostic scripts he’s put together with some of my own customized ones. When running these, I personally, don’t care how they are stored in the plan cache etc.

I recently had the opportunity to sit in on a good session about this by Kendra Little over at Brent Ozar PLF ( good group of guys and if you haven’t ever checked them out I implore you to do so; they have some great items they discuss and free weekly training ). Kendra goes through some real world examples in her demo and it would behoove you to give it a look.

As I said earlier I’d love to hear some of your experiences with the option and the pros and cons you may have on it. If you have time drop me a line.