Okay, so I had this super annoying issue with Golden Gate blocking sessions the other day. It was driving me nuts! I spent hours trying to figure it out, and let me tell you, it wasn’t pretty. But I finally cracked it, and I figured I’d share my experience, so maybe I can save someone else the headache.
My Troubleshooting Journey
First, I checked the usual suspects. I looked at the Golden Gate error logs, of course. I mean, that’s the obvious first step, right? I scrolled through them, hoping to find some clear error message pointing me to the problem. It’s always satisfying to find something that jumps out with the answer.
I also checked for any long-running transactions on the source and target databases. Sometimes, a big, slow transaction can hold things up, causing everything else to back up behind it. Think of it like a traffic jam on the highway.
Another basic thing I did was verify the network connectivity between the source and target servers. Sometimes, simple thing will be the root cause. It’s the classic “is it plugged in?” scenario, but for databases.
After that I checked, I found some blocking in my database, So I tried to find out the blocking session user, session ID, SQL, and other info. I used this SQL.
SELECT FROM v$session WHERE blocking_session IS NOT NULL;Then I got the blocking session detail.
So, I immediately killed the session in my database, Then Golden Gate worked well again, and replication continued as usual.
I’m not gonna lie, I jumped some celebrations when I finally saw the data flowing smoothly again. It was a huge relief!