Thursday, 29 September 2016

Using ‘sp_browsereplcmds’ to Diagnose SQL Replication Issues

When diagnosing transactional replication issues in SQL Server, we may need to examine pending commands within the distribution database. In other words, we not only have to monitor these pending commands but also take necessary actions to ensure the replication continues to function. For instance, at times, we may need to terminate specific commands due to errors that prevent other commands from being replicated to subscribers. Before doing so, we must first identify which commands have to be removed from the queue, using the sp_browsereplcmds system stored procedure. This procedure accepts several input parameters, such as article_id.

EXEC SP_BROWSEREPLCMDS @article_id = 1

After executing it, we are going to filter only the pending commands for the Article in question. (Remember that an article in replication is directly related to a table. You can query ‘sysarticles’ system table inside the published database.)


Another parameter we can use in order to get more specific information is the transaction sequence number which is essentially the identifier for the transaction. Luckily, when reading some errors, we can see the sequence number and command ID which allow us to identify exactly the root cause we need to work on with ease.

EXEC SP_BROWSEREPLCMDS @xact_seqno_start = '0x00000027000000B50008',@xact_seqno_end = '0x00000027000000B50008' 


There are other parameters like command ID to get only the command we need to look into, and also the database ID to get all commands for that database.

EXEC SP_BROWSEREPLCMDS @xact_seqno_start = '0x00000027000000B50008',@xact_seqno_end = '0x00000027000000B50008' , @publisher_database_id = 33, @article_id = 1,@command_id= 1

Be cautious, do not execute ‘sp_browsereplcmds’ without any parameter on production database environments as they can have millions of commands inside Distribution database and as a result of this we will not get what we need rapidly and at the same time we will affect the database server performance. I hope you can find this post interesting when it comes to troubleshooting replication issues. Let me know any remark you may have. Thanks for reading.

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Let me know any remarks or questions you may have. Please write down your name.

HELLO, I'M PERCY REYES! I've been working as a senior SQL Server Database Engineer for over 20 years; I'm a three-time Microsoft Data Platform MVP. I'm a cryptographer conducting research on cryptographic Boolean functions and their applications.