Re: type cache cleanup improvements

Aleksander Alekseev <aleksander@timescale.com>

From: Aleksander Alekseev <aleksander@timescale.com>

To: Pgsql Hackers <pgsql-hackers@postgresql.org>

Cc: Tom Lane <tgl@sss.pgh.pa.us>, Teodor Sigaev <teodor@sigaev.ru>

Date: 2024-03-11T12:24:57Z

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

Attachments

v4-0001-Improve-performance-of-type-cache-cleanup.patch (application/octet-stream) patch v4-0001

Hi,

> Yep, exacly. One time from 2^32 we reset whole cache instead of one (or several)
> entry with hash value = 0.

Got it. Here is an updated patch where I added a corresponding comment.

Now the patch LGTM. I'm going to change its status to RfC unless
anyone wants to review it too.

-- 
Best regards,
Aleksander Alekseev