On 2023-Aug-09, Melih Mutlu wrote: > --Patch > name | used_bytes | free_bytes | total_bytes > -----------------------+------------+------------+------------- > RelCacheMemoryContext | 4706464 | 3682144 | 8388608 > CatCacheMemoryContext | 3489384 | 770712 | 4260096 > index info | 2102160 | 113776 | 2215936 > CacheMemoryContext | 2336 | 5856 | 8192 > relation rules | 4416 | 3776 | 8192 > (5 rows)
Hmm, is this saying that there's too much fragmentation in the relcache context? Maybe it would improve things to make it a SlabContext instead of AllocSet. Or, more precisely, a bunch of SlabContexts, each with the appropriate chunkSize for the object being stored. (I don't say this because I know for a fact that Slab is better for these purposes; it's just that I happened to read its comments yesterday and they stated that it behaves better in terms of fragmentation. Maybe Andres or Tomas have an opinion on this.) -- Álvaro Herrera 48°01'N 7°57'E — https://www.EnterpriseDB.com/ "I love the Postgres community. It's all about doing things _properly_. :-)" (David Garamond)
