Finding Abnormally Long-Running Jobs

Lori Brown has a script to find jobs running longer than their 30-day average:

I needed to update some of our long running job monitoring code to improve it from the version that we have right now. I like this version because it uses msdb.dbo.syssessions (https://msdn.microsoft.com/en-us/library/ms175016.aspx) to validate that a job is actually running. I also wanted to know the percent difference between the current run duration versus an average duration per job from the past 30 days. I decided to place the calculated average into a table variable and then join on it to get my results. I also used the IIF function (https://msdn.microsoft.com/en-us/library/hh213574.aspx) to help me avoid a divide by zero error that comes up when the average duration equals 0.

One thing which could cut down on false positives would be to calculate the standard deviation as well.  I wouldn’t automatically assume that job executions were normally distributed, but if you look at things more than one standard deviation away from the mean, it should remove noise of jobs which are just a little over the average but not in dangerous territory.

Related Posts

When Disabled SQL Agent Jobs Still Run

David Fowler troubleshoots a nasty issue with the SQL Server Agent: In a previous blog post: Duplicate Agent jobs – A good reason not to meddle with Msdb I explained a situation where someone was updating msdb tables manually rather than using the supplied system stored procedures such as msdb.dbo.sp_update_job, It would seem that this was not […]

Read More

Creating Timelines With dbatools

Marcin Gminski shows how to pull SQL Agent and backup history out of SQL Server and display it as a visual history timeline: Currently, the output from the following commands is supported: Get-DbaAgentJobHistory Get-DbaBackupHistory You will run the above commands as you would normally do but pipe the output to ConvertTo-DbaTimeline, the same way as you […]

Read More

Categories

January 2017
MTWTFSS
« Dec Feb »
 1
2345678
9101112131415
16171819202122
23242526272829
3031