Blog Archives

How much transaction log, transactions generate?

Hi Everyone,

I wanted to share something that I am doing this week at work. One of the applications that I support is generating a lot of transaction log in the database. Just to have an idea, we run Transaction Log backups every 30 minutes and I have backups over 100GB and sometimes 200GB. The difficult part of investigating what is generating that amount of log is because the databases involved are used by at least 3 different applications and streams. So, I remember that in the past I created a simple script that looks at this information in the database and then I may have more inputs of what is really generating that amount of log. Read the rest of this entry

The overlapped instance error

One of the possible scenarios for SQL Server FCI to AG migration is adding a third node to the Windows Failover Cluster and creating an Availability Groups between the FCI and the third standalone SQL Server, or having one node as FCI and the other node as a standalone SQL.

In my case I am running with the second option. I have one node with SQL Server 2014 FCI and the other node SQL Server 2016 Standalone, but the servers are in the Windows Cluster. When you try to create the Availability Groups between them you get the following error. Read the rest of this entry