dropping-chunks-times-out.md

title	section	products	topics	apis	keywords	tags
Dropping chunks times out	troubleshooting	cloud mst self_hosted	data retention hypertables	hypertables drop_chunks()	data retention chunks	drop delete locks

When you drop a chunk, it requires an exclusive lock. If a chunk is being accessed by another session, you cannot drop the chunk at the same time. If a drop chunk operation can't get the lock on the chunk, then it times out and the process fails. To resolve this problem, check what is locking the chunk. In some cases, this could be caused by a continuous aggregate or other process accessing the chunk. When the drop chunk operation can get an exclusive lock on the chunk, it completes as expected.

For more information about locks, see the PostgreSQL lock monitoring documentation.