Albe Laurenz <laurenz.albe@wien.gv.at> writes: > Adir Shaban wrote: >> Is there anyway to limit a database size? >> For example, I need to create a database for user X and I don't want it to use more than 5 GB.
> You can create a tablespace on a device with limited size. > Then you can create the database on that tablespace.
Note the reference to tablespace. It's unwise to just put the whole cluster on a tiny device (or equivalently, attempt to solve this with OS-level disk quotas applied to the whole installation). The reason is that PG gets very unhappy if it runs out of WAL space. Hitting a limit on table size per se behaves a bit more sanely, though even there you can get into trouble --- for instance, in some situations VACUUM will try to allocate additional disk space, making recovery harder.
