| From: | Yura Sokolov <y(dot)sokolov(at)postgrespro(dot)ru> |
|---|---|
| To: | PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Cc: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, michail(dot)nikolaev(at)gmail(dot)com, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Andres Freund <andres(at)anarazel(dot)de>, Simon Riggs <simon(dot)riggs(at)enterprisedb(dot)com> |
| Subject: | Re: BufferAlloc: don't take two simultaneous locks |
| Date: | 2022-03-02 22:35:57 |
| Message-ID: | e70ea8843dcc94cdb8e7892c5140d683f75e4baf.camel@postgrespro.ru |
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| Lists: | pgsql-hackers |
В Вт, 01/03/2022 в 10:24 +0300, Yura Sokolov пишет:
> Ok, here is v4.
And here is v5.
First, there was compilation error in Assert in dynahash.c .
Excuse me for not checking before sending previous version.
Second, I add third commit that reduces HASHHDR allocation
size for non-partitioned dynahash:
- moved freeList to last position
- alloc and memset offset(HASHHDR, freeList[1]) for
non-partitioned hash tables.
I didn't benchmarked it, but I will be surprised if it
matters much in performance sence.
Third, I put all three commits into single file to not
confuse commitfest application.
--------
regards
Yura Sokolov
Postgres Professional
y(dot)sokolov(at)postgrespro(dot)ru
funny(dot)falcon(at)gmail(dot)com
| Attachment | Content-Type | Size |
|---|---|---|
| v5-bufmgr-lock-improvements.patch | text/x-patch | 26.0 KB |
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