Re: type cache cleanup improvements

Artur Zakirov <zaartur@gmail.com>

From: Artur Zakirov <zaartur@gmail.com>

To: jian he <jian.universality@gmail.com>

Cc: Alexander Korotkov <aekorotkov@gmail.com>, Andrei Lepikhov <lepihov@gmail.com>, Alexander Lakhin <exclusion@gmail.com>, Pavel Borisov <pashkin.elfe@gmail.com>, Teodor Sigaev <teodor@sigaev.ru>, Pgsql Hackers <pgsql-hackers@postgresql.org>, Aleksander Alekseev <aleksander@timescale.com>, Tom Lane <tgl@sss.pgh.pa.us>, Michael Paquier <michael@paquier.xyz>

Date: 2024-10-15T13:16:07Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Maintain RelIdToTypeIdCacheHash in TypeCacheOpcCallback()
- bb78e4267817 18.0 landed
Fix concurrrently in typcache_rel_type_cache.sql
- aa1e898dea66 18.0 landed
Avoid looping over all type cache entries in TypeCacheRelCallback()
- b85a9d046efd 18.0 landed
- c14d4acb8134 18.0 landed
Update header comment for lookup_type_cache()
- c1500a1ba7e1 18.0 landed
Revert: Avoid looping over all type cache entries in TypeCacheRelCallback()
- 8daa62a10c91 18.0 landed
Introduce hash_search_with_hash_value() function
- d0f020037e19 18.0 landed
Optimize InvalidateAttoptCacheCallback() and TypeCacheTypCallback()
- 40064a8ee1b3 18.0 landed
Refactor initial hash lookup in dynahash.c
- cc5ef90edd80 17.0 landed
Rationalize and improve error messages for some jsonpath items
- 92d2ab7554f9 17.0 cited
Avoid race in RelationBuildDesc() affecting CREATE INDEX CONCURRENTLY.
- fdd965d074d4 15.0 cited
Represent Lists as expansible arrays, not chains of cons-cells.
- 1cff1b95ab6d 13.0 cited

On Tue, 15 Oct 2024 at 11:50, jian he <jian.universality@gmail.com> wrote:
> based on above information, i am still  confused with
> cleanup_in_progress_typentries, in_progress_list_len
> is there any simple sql example to demo
> cleanup_in_progress_typentries,  in_progress_list_len> 0.

AFAIK to reproduce cases when `in_progress_list_len > 0`
`lookup_type_cache()` should fail during its execution.

To do so you can call `lookup_type_cache()` with non-existing type_id
from a C function.

-- 
Kind regards,
Artur