| From: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com>, Maciek Sakrejda <m(dot)sakrejda(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
| Subject: | Re: [Proposal] Fully WAL logged CREATE DATABASE - No Checkpoints |
| Date: | 2022-09-02 11:55:52 |
| Message-ID: | 20220902115552.GZ31833@telsasoft.com |
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| Lists: | pgsql-hackers |
On Tue, Aug 02, 2022 at 12:50:43PM -0500, Justin Pryzby wrote:
> Also, if I understand correctly, this patch seems to assume that nobody is
> connected to the source database. But what's actually enforced is just that
> nobody *else* is connected. Is it any issue that the current DB can be used as
> a source? Anyway, both of the above problems are reproducible using a
> different database.
>
> |postgres=# CREATE DATABASE new TEMPLATE postgres STRATEGY wal_log;
> |CREATE DATABASE
On Thu, Aug 04, 2022 at 05:16:04PM -0500, Justin Pryzby wrote:
> On Thu, Aug 04, 2022 at 06:02:50PM -0400, Tom Lane wrote:
> > The "invalidation" comment bothered me for awhile, but I think it's
> > fine: we know that no other backend can connect to the source DB
> > because we have it locked,
>
> About that - is it any problem that the currently-connected db can be used as a
> template? It's no issue for 2-phase commit, because "create database" cannot
> run in an txn.
Would anybody want to comment on this ?
Is it okay that the *current* DB can be used as a template ?
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