st 19. 3. 2025 v 18:14 odesílatel Álvaro Herrera <alvhe...@alvh.no-ip.org> napsal:
> Hello > > On 2025-Mar-19, Siraj G wrote: > > > I have a PG (v16) instance which is occupying around 1TB of storage. Out > of > > this, around 350GB is occupied by the table pg_catalog.pg_attribute. > > Why is the catalog table's size so big? > > Heavy use of temp tables is a known cause of this. > > > I think this table must have tons of dead tuples. Please suggest to me if > > we can purge any data/shrink the size of this table. > > Yeah, I'd also bet that there are tons of dead tuples, or just unused > free space. To purge it you would use VACUUM FULL, though that would > need to lock all accesses to the table. > > Does your instance run with autovacuum disabled perchance? > or long unclosed transactions, maybe forgotten replication slots, ... It is very strange so with this size it is still usable. Today hardware is unbelievable strong Regards Pavel > > -- > Álvaro Herrera PostgreSQL Developer — > https://www.EnterpriseDB.com/ > Bob [Floyd] used to say that he was planning to get a Ph.D. by the "green > stamp method," namely by saving envelopes addressed to him as 'Dr. Floyd'. > After collecting 500 such letters, he mused, a university somewhere in > Arizona would probably grant him a degree. (Don Knuth) > > >
