On Tue, Nov 22, 2022 at 05:16:59PM +, Simon Riggs wrote:
> Justin, if you wanted to take up the patch from here, I would be more
> than happy. You have the knowledge and insight to make this work
> right.
I have no particular use for this, so I wouldn't be a good person to
finish or shepherd t
On Tue, 22 Nov 2022 at 16:43, Justin Pryzby wrote:
>
> On Mon, Nov 21, 2022 at 03:07:25PM +, Simon Riggs wrote:
> > Attached patch implements VACUUM (BACKGROUND).
> >
> > There are quite a few small details to consider; please read the docs
> > and comments.
> >
> > There is a noticeable delay
On Mon, Nov 21, 2022 at 03:07:25PM +, Simon Riggs wrote:
> Attached patch implements VACUUM (BACKGROUND).
>
> There are quite a few small details to consider; please read the docs
> and comments.
>
> There is a noticeable delay before the background vacuum starts.
You disallowed some combina
On Fri, 18 Nov 2022 at 11:54, Simon Riggs wrote:
>
> On Thu, 17 Nov 2022 at 20:00, Justin Pryzby wrote:
> >
> > On Wed, Nov 16, 2022 at 05:14:07PM -0500, Greg Stark wrote:
> > > I think this requesting autovacuum worker should be a distinct
> > > command. Or at least an explicit option to vacuum.
On Fri, 18 Nov 2022 at 18:26, Tom Lane wrote:
>
> Robert Haas writes:
> > On Fri, Nov 18, 2022 at 7:04 AM Simon Riggs
> > wrote:
> >> So if consistency is also a strong requirement, then maybe we should
> >> make that new command the default, i.e. make VACUUM always just a
> >> request to vacuum
Robert Haas writes:
> On Fri, Nov 18, 2022 at 7:04 AM Simon Riggs
> wrote:
>> So if consistency is also a strong requirement, then maybe we should
>> make that new command the default, i.e. make VACUUM always just a
>> request to vacuum in background. That way it will be consistent.
> Since one
On Fri, Nov 18, 2022 at 7:04 AM Simon Riggs
wrote:
> Outside a transaction - works perfectly
> In a transaction - throws ERROR, which prevents a whole script from
> executing correctly
Right, but your proposal would move that inconsistency to a different
place. It wouldn't eliminate it. I don't t
On Thu, 17 Nov 2022 at 20:06, Robert Haas wrote:
>
> On Wed, Nov 16, 2022 at 5:14 PM Greg Stark wrote:
> > However I'm not a fan of commands that sometimes do one thing and
> > sometimes magically do something very different. I don't like the idea
> > that the same vacuum command would sometimes
On Thu, 17 Nov 2022 at 20:00, Justin Pryzby wrote:
>
> On Wed, Nov 16, 2022 at 05:14:07PM -0500, Greg Stark wrote:
> > I think this requesting autovacuum worker should be a distinct
> > command. Or at least an explicit option to vacuum.
>
> +1. I was going to suggest VACUUM (NOWAIT) ..
Yes, I ha
On Wed, Nov 16, 2022 at 5:14 PM Greg Stark wrote:
> However I'm not a fan of commands that sometimes do one thing and
> sometimes magically do something very different. I don't like the idea
> that the same vacuum command would sometimes run in-process and
> sometimes do this out of process reques
On Wed, Nov 16, 2022 at 05:14:07PM -0500, Greg Stark wrote:
> I think this requesting autovacuum worker should be a distinct
> command. Or at least an explicit option to vacuum.
+1. I was going to suggest VACUUM (NOWAIT) ..
--
Justin
Greg Stark writes:
> I think this requesting autovacuum worker should be a distinct
> command. Or at least an explicit option to vacuum.
+1. That'd reduce confusion, and perhaps we could remove some
of the restrictions.
regards, tom lane
I think the idea of being able to request an autovacuum worker for a
specific table is actually very good. I think it's what most users
actually want when they are running vacuum. In fact in previous jobs
people have built infrastructure that basically duplicates autovacuum
just so they could do th
On Mon, 14 Nov 2022 at 19:52, Simon Riggs wrote:
>
> On Tue, 8 Nov 2022 at 03:10, Simon Riggs wrote:
> >
> > On Mon, 7 Nov 2022 at 08:20, Simon Riggs
> > wrote:
> >
> > > Temp tables are actually easier, since we don't need any of the
> > > concurrency features we get with lazy vacuum.
>
> > Th
On Tue, 8 Nov 2022 at 03:10, Simon Riggs wrote:
>
> On Mon, 7 Nov 2022 at 08:20, Simon Riggs wrote:
>
> > Temp tables are actually easier, since we don't need any of the
> > concurrency features we get with lazy vacuum.
> Thoughts?
New patch, which does this, when in a xact block
1. For temp t
On Mon, 7 Nov 2022 at 08:20, Simon Riggs wrote:
> Temp tables are actually easier, since we don't need any of the
> concurrency features we get with lazy vacuum. So the answer is to
> always run a VACUUM FULL on temp tables since this skips any issues
> with indexes etc..
So I see 3 options for
On Mon, Nov 7, 2022 at 12:20 AM Simon Riggs
wrote:
> > Another related idea: better behavior in the event of a manually
> > issued VACUUM (now just an enqueued autovacuum) that cannot do useful
> > work due to the presence of a long running snapshot. The VACUUM
> > doesn't have to dutifully report
On Sun, 6 Nov 2022 at 20:40, Peter Geoghegan wrote:
>
> On Sun, Nov 6, 2022 at 11:14 AM Tom Lane wrote:
> > In general, I do not believe in encouraging users to run VACUUM
> > manually in the first place. We would be far better served by
> > spending our effort to improve autovacuum's shortcomin
On Sun, 6 Nov 2022 at 18:50, Peter Geoghegan wrote:
>
> On Thu, Oct 27, 2022 at 2:31 AM Simon Riggs
> wrote:
> > Fix, so that this works without issue:
> >
> > BEGIN;
> >
> > VACUUM (ANALYZE) vactst;
> >
> > COMMIT;
> >
> > Allows both ANALYZE and vacuum of toast tables, but not VACUUM
On Sun, Nov 6, 2022 at 11:14 AM Tom Lane wrote:
> In general, I do not believe in encouraging users to run VACUUM
> manually in the first place. We would be far better served by
> spending our effort to improve autovacuum's shortcomings.
I couldn't agree more. A lot of problems seem related to t
Peter Geoghegan writes:
> My guess is that there are more things like that. Possibly even things
> that were never directly considered. VACUUM evolved in a world where
> we absolutely took not running in a transaction for granted. Changing
> that now is a pretty big deal. Maybe it would all be wor
On Thu, Oct 27, 2022 at 2:31 AM Simon Riggs
wrote:
> Fix, so that this works without issue:
>
> BEGIN;
>
> VACUUM (ANALYZE) vactst;
>
> COMMIT;
>
> Allows both ANALYZE and vacuum of toast tables, but not VACUUM FULL.
>
> When in a xact block, we do not set PROC_IN_VACUUM,
> nor update da
Hi,
On Fri, Nov 4, 2022 at 2:39 PM Simon Riggs
wrote:
> Hi Rahila,
>
> Thanks for your review.
>
> On Fri, 4 Nov 2022 at 07:37, Rahila Syed wrote:
>
> >> I would like to bring up a few points that I came across while looking
> into the vacuum code.
> >>
> >> 1. As a result of this change to al
Hi Rahila,
Thanks for your review.
On Fri, 4 Nov 2022 at 07:37, Rahila Syed wrote:
>> I would like to bring up a few points that I came across while looking into
>> the vacuum code.
>>
>> 1. As a result of this change to allow VACUUM inside a user transaction, I
>> think there is some chance
Hi Simon,
On Fri, Nov 4, 2022 at 10:15 AM Rahila Syed wrote:
> Hi Simon,
>
> On Thu, Nov 3, 2022 at 3:53 PM Simon Riggs
> wrote:
>
>> On Tue, 1 Nov 2022 at 23:56, Simon Riggs
>> wrote:
>>
>> > > I haven't checked the rest of the patch, but +1 for allowing VACUUM
>> FULL
>> > > within a user tx
Hi Simon,
On Thu, Nov 3, 2022 at 3:53 PM Simon Riggs
wrote:
> On Tue, 1 Nov 2022 at 23:56, Simon Riggs
> wrote:
>
> > > I haven't checked the rest of the patch, but +1 for allowing VACUUM
> FULL
> > > within a user txn.
> >
> > My intention was to prevent that. I am certainly quite uneasy about
On Tue, 1 Nov 2022 at 23:56, Simon Riggs wrote:
> > I haven't checked the rest of the patch, but +1 for allowing VACUUM FULL
> > within a user txn.
>
> My intention was to prevent that. I am certainly quite uneasy about
> changing anything related to CLUSTER/VF, since they are old, complex
> and
On Thu, 27 Oct 2022 at 21:07, Justin Pryzby wrote:
>
> On Thu, Oct 27, 2022 at 10:31:31AM +0100, Simon Riggs wrote:
> > Allows both ANALYZE and vacuum of toast tables, but not VACUUM FULL.
>
> Maybe I misunderstood what you meant: you said "not VACUUM FULL", but
> with your patch, that works:
>
>
On Thu, Oct 27, 2022 at 10:31:31AM +0100, Simon Riggs wrote:
> Allows both ANALYZE and vacuum of toast tables, but not VACUUM FULL.
Maybe I misunderstood what you meant: you said "not VACUUM FULL", but
with your patch, that works:
postgres=# begin; VACUUM FULL pg_class; commit;
BEGIN
VACUUM
COMMI
On Thu, Oct 27, 2022 at 9:49 PM Simon Riggs
wrote:
>
> On Thu, 27 Oct 2022 at 10:31, Simon Riggs
> wrote:
>
> > Tests, docs.
>
> The patch tester says that a pg_upgrade test is failing on Windows,
> but works for me.
>
> t/002_pg_upgrade.pl .. ok
>
> Anybody shed any light on that, much apprecia
On Thu, 27 Oct 2022 at 10:31, Simon Riggs wrote:
> Tests, docs.
The patch tester says that a pg_upgrade test is failing on Windows,
but works for me.
t/002_pg_upgrade.pl .. ok
Anybody shed any light on that, much appreciated.
--
Simon Riggshttp://www.EnterpriseDB.com/
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