| From: | "tsunakawa(dot)takay(at)fujitsu(dot)com" <tsunakawa(dot)takay(at)fujitsu(dot)com> |
|---|---|
| To: | 'Masahiko Sawada' <sawada(dot)mshk(at)gmail(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, "osumi(dot)takamichi(at)fujitsu(dot)com" <osumi(dot)takamichi(at)fujitsu(dot)com>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, "masao(dot)fujii(at)oss(dot)nttdata(dot)com" <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, "laurenz(dot)albe(at)cybertec(dot)at" <laurenz(dot)albe(at)cybertec(dot)at>, "ashutosh(dot)bapat(dot)oss(at)gmail(dot)com" <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | RE: Disable WAL logging to speed up data loading |
| Date: | 2021-01-11 00:14:04 |
| Message-ID: | TYAPR01MB2990A36E60D64D3E11F928A9FEAB0@TYAPR01MB2990.jpnprd01.prod.outlook.com |
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| Lists: | pgsql-hackers |
From: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>
> I think it's better to have index AM (and perhaps table AM) control it
> instead of filtering in XLogInsert(). Because otherwise third-party
> access methods that use LSN like gist indexes cannot write WAL records
> at all when wal_level = none even if they want.
Hm, third-party extensions use RM_GENERIC_ID, so it should probably be allowed in XLogInsert() as well instead of allowing control in some other way. It's not unnatural that WAL records for in-core AMs are filtered in XLogInsert().
Regards
Takayuki Tsunakawa
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