Skip to main content

DBMIRROR_EVENT_QUEUE

I was recently attempting to re-establish mirroring for a client and realized the following waittype hanging on the database.





I initially thought, the mirroring session was not removed correctly but after further verification it was soon obvious that the mirroring session had been discontinued and it was clean.

When I attempt to kill the process PSID = 20 , I got the following message 
Spid = 20
Msg 6107, Level 14, State 1, Line 1
Only user processes can be killed.


At 2 am in the morning I was no mood for research , I was just interested in getting the mirroring session established and get to bed.
I knew it was a matter of dropping the database and getting about with the normal business. Then I mistakenly executed the restore databases script !!!!. surprisingly the restore didn’t complain and progressed to complete without errors and I continued to setup the mirroring session, which completed successfully.

Later during the day I discovered that this could have been an a idel/orphaned session that was left behind when mirroring was aborted.  


http://social.msdn.microsoft.com/Forums/en-US/sqldatabaseengine/thread/301e9248-5900-4f9e-ab22-0745ce72bc1e/

Comments

Post a Comment

Popular posts from this blog

Create a dacpac To Compare Schema Differences

It's been some time since i added anything to the blog and a lot has happened in the last few months. I have run into many number of challenging stuff at Xero and spread my self to learn new things. As a start i want to share a situation where I used a dacpac to compare the differences of a database schema's. - This involves of creating the two dacpacs for the different databases - Comparing the two dacpacs and generating a report to know the exact differences - Generate a script that would have all the changes How to generate a dacbpac The easiest way to create a dacpac for a database is through management studio ( right click on the databae --> task --> Extract data-tier-application). This will work under most cases but will error out when the database has difffrent settings. ie. if CDC is enabled To work around this blocker, you need to use command line to send the extra parameters. Bellow is the command used to generate the dacpac. "%ProgramFiles...
11 comments
Read more

High Watermarks For Incremental Models in dbt

The last few months it’s all been dbt. Dbt is a transform and load tool which is provided by fishtown analytics. For those that have created incremental models in dbt would have found the simplicity and easiness of how it drives the workload. Depending on the target datastore, the incremental model workload implementation changes. But all that said, the question is, should the incremental model use high-watermark as part of the implementation. How incremental models work behind the scenes is the best place to start this investigation. And when it’s not obvious, the next best place is to investigate the log after an test incremental model execution and find the implementation. Following are the internal steps followed for a datastore that does not support the merge statements. This was observed in the dbt log. - As the first step, It will copy all the data to a temp table generated from the incremental execution. - It will then delete all the data from the base table th...
4 comments
Read more

How to Backup postgres globals without sysadmin permission in RDS

For those of my Friends who are on postgres RDS and require to backup the globas for a rds instance you would soon find it can't perform a backup with pg_dumpall --globals-only.  The default user that gets created along with the RDS postgres instance does not have adequate permission to get through the backup processes. Bellow is the message that you would receive. pg_dumpall.exe : pg_dumpall: query failed: ERROR:  permission denied for relation pg_authid At line:1 char:1 + & 'C:\setup_msi\postgres\bin\pg_dumpall.exe'  -h XXXXXX.cXXXX... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~    + CategoryInfo          : NotSpecified: (pg_dumpall: que...ation pg_authid:String) [], RemoteException    + FullyQualifiedErrorId : NativeCommandError pg_dumpall: query was: SELECT oid, rolname, rolsuper, rolinherit, rolcreaterole, rolcreatedb, rolcanlogin,...
2 comments
Read more