| From: | "tsunakawa(dot)takay(at)fujitsu(dot)com" <tsunakawa(dot)takay(at)fujitsu(dot)com> |
|---|---|
| To: | 'Stephen Frost' <sfrost(at)snowman(dot)net> |
| Cc: | 'David Steele' <david(at)pgmasters(dot)net>, "osumi(dot)takamichi(at)fujitsu(dot)com" <osumi(dot)takamichi(at)fujitsu(dot)com>, 'Kyotaro Horiguchi' <horikyota(dot)ntt(at)gmail(dot)com>, "sawada(dot)mshk(at)gmail(dot)com" <sawada(dot)mshk(at)gmail(dot)com>, "robertmhaas(at)gmail(dot)com" <robertmhaas(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: | 2021-03-22 04:18:41 |
| Message-ID: | TYAPR01MB2990CE894C89E3DE4F5361E1FE659@TYAPR01MB2990.jpnprd01.prod.outlook.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
From: Stephen Frost <sfrost(at)snowman(dot)net>
> The argument here seems to stem from the idea that issueing a 'TRUNCATE'
> inside the transaction before starting the 'COPY' command is 'too hard'.
> I could be wrong and perhaps opinions will change in the future, but it really
> doesn't seem like the there's much support for adding a new WAL level just to
> avoid doing the TRUNCATE. Appealing to what other database systems
> support can be helpful in some cases but that's usually when we're looking at a
> new capability which multiple other systems have implemented. This isn't
> actually a new capability at all- the WAL level that you're looking for already
> exists and already gives the optimization you're looking for, as long as you issue
> a TRUNCATE at the start of the transaction.
No, we can't ask using TRUNCATE because the user wants to add data to a table.
Regards
Takayuki Tsunakawa
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Masahiko Sawada | 2021-03-22 04:25:16 | Re: Replication slot stats misgivings |
| Previous Message | Pavel Stehule | 2021-03-22 04:09:43 | Re: proposal - psql - use pager for \watch command |