cluster (US025)

Automatic fix is not available.

What it does

Checks cluster.

Why not?

When a table is being clustered, an ACCESS EXCLUSIVE lock is acquired on it. This prevents any other database operations (both reads and writes) from operating on the table until the CLUSTER is finished. This will cause downtime if the table is concurrently being accessed by other clients.

When should you?

If the table is empty. If the table is not empty but is not being concurrently accessed.

Use instead:

Have a look at pg_repack as an alternative.