Dear @raphaelblg,

thanks for your response. I'm not sure this is what I observe, due to the following two reasons:

- the auto optimize is triggered every ~3 hrs or so, not after every MERGE

- the auto optimize only appears when using DBR 14.3 LTS. Specifically, it does not appear when I run the exact same code under DBR 13.3 LTS.

Again, in principle I do not mind at all the auto optimization. The only thing that raises my attention is that the auto optimize does not cluster (see screenshot above).

Is there a reason why an auto optimization step on a liquid clustering table should not use the cluster information? And why does the auto optimization only occurs for DBR 14.3 LTS, but not in DBR 13.3 LTS?

Thanks and best!