Hello
pg_stat_statements is a great tool to track performance issue in live
databases, especially when adding interfaces like PoWA on top of it.
But so far, tools like PoWA can not track the min_time, max_time, mean_time
and sum_var_time of queries : these statistics are cumulated over time,
On Sun, Sep 01, 2019 at 01:57:06PM +0200, Fabien COELHO wrote:
> I would put back unlikely() on overflow tests, as there are indeed unlikely
> to occur and it may help some compilers, and cannot be harmful. It also
> helps the code reader to know that these path are not expected to be taken
>
> 30 авг. 2019 г., в 16:44, Andrey Borodin написал(а):
>
>
> How do you think, should I supply GiST-build patch with docs and tests and
> add it to CF? Or do we need more design discussion before?
PFA v2: now sort support is part of opclass.
There's a problem with Z-ordering NaN which
On Fri, Aug 30, 2019 at 2:44 PM Andrey Borodin wrote:
>
> 30 авг. 2019 г., в 3:47, Alexander Korotkov
> написал(а):
>
> 1) Binary search in non-leaf pages instead of probing each key is much faster.
>
>
> That's a neat idea, but key union breaks ordering, even for z-order.
> for two sets of
Folks,
I'd like to $Subject, on by default, with a switch to turn it off for
those really at the outer edges of performance. Some reasons include:
- It's broadly useful.
- Right now, the barrier for turning it on is quite high. In addition
to being non-core, which is already a pretty high
On Sun, Sep 1, 2019 at 11:07 AM Alexander Korotkov
wrote:
> This patch have to implement its own check if tuple is allvisible.
> But it appears to be possible to simplify this check assuming that all
> tuples already past HeapTupleSatisfiesVacuum(), which sets hint bits.
Forgot to check tuple
hes/0130/logrep_rowfilter/20190901/0005-Row-filtering-for-logical-replication.patch
checking file doc/src/sgml/catalogs.sgml
Hunk #1 succeeded at 5595 (offset 8 lines).
checking file doc/src/sgml/ref/alter_publication.sgml
checking file doc/src/sgml/ref/create_publication.sgml
checking file src/back
On Fri, Aug 30, 2019 at 6:28 AM Peter Geoghegan wrote:
> On Thu, Aug 29, 2019 at 8:22 PM Alexander Korotkov
> wrote:
> > Alternatively you can encode size in Z-value. But this increases
> > dimensionality of space and decreases efficiency of join. Also,
> > spatial join can be made using two
Michaël,
I would put back unlikely() on overflow tests, as there are indeed unlikely
to occur and it may help some compilers, and cannot be harmful. It also
helps the code reader to know that these path are not expected to be taken
often.
Hm. I don't agree about that part, and the original
> > Btw I have working multirange_{send,recv,in,out} now. . . .
Just about all the other operators are done too, but I wonder what
symbols people like for union and minus? Range uses + for union. I
have working code and tests that adds this:
r + mr = mr
mr + r = mr
mr + mr = mr
But I would like
Hi!
I found it weird that CLUSTER/VACUUM FULL don't write visibility map.
Attached patch implements writing visibility map in
heapam_relation_copy_for_cluster().
I've studied previous attempt to implement this [1]. The main problem
of that attempt was usage of existing
Bonjour Michaël,
You are right as well that having symmetry with the signed methods is
much better. In order to see the difference, you can just do that with
the extension attached, after of course hijacking int.h with some undefs
and recompiling the backend and the module: select
Em dom, 1 de set de 2019 às 06:04, Pierre Ducroquet
escreveu:
>
> Hello
>
> pg_stat_statements is a great tool to track performance issue in live
> databases, especially when adding interfaces like PoWA on top of it.
> But so far, tools like PoWA can not track the min_time, max_time, mean_time
>
Hi,
News from Fabien's bleeding edge compiler zoo: apparently GCC 10
20190831 thinks the tsearch test should produce different output than
20190824 did. It looks like the parsing of question marks change...
I can't wait for next week's installment.
--
Thomas Munro
https://enterprisedb.com
On Sun, Sep 01, 2019 at 08:12:15PM +0200, Pavel Stehule wrote:
> Hi
>
> ne 1. 9. 2019 v 20:00 odesílatel David Fetter napsal:
>
> > Folks,
> >
> > I'd like to $Subject, on by default, with a switch to turn it off for
> > those really at the outer edges of performance. Some reasons include:
> >
From: Tom Lane [mailto:t...@sss.pgh.pa.us]
> After investigation, the mechanism that's causing that is that the
> src/test/recovery/t/010_logical_decoding_timelines.pl test shuts
> down its replica server with a mode-immediate stop, which causes
> that postmaster to shut down all its children with
On Fri, Aug 30, 2019 at 8:27 PM Kuntal Ghosh wrote:
> I'm getting the following assert failure while performing the recovery
> with the same.
> "TRAP: FailedAssertion("slot->meta.status == UNDO_LOG_STATUS_FULL",
> File: "undolog.c", Line: 997)"
>
> I found that we don't emit an WAL record when we
Hi!
Andrey Borodin noticed me that results of some KNN-GIST tests are
obviously wrong and don't match results of sort node.
SELECT * FROM point_tbl ORDER BY f1 <-> '0,1';
f1
---
(10,10)
(NaN,NaN)
(0,0)
(1e-300,-1e-300)
(-3,4)
(-10,0)
(-5,-12)
(5.1,34.5)
> 2 сент. 2019 г., в 9:54, Alexander Korotkov
> написал(а):
>
> It appears to be related to implementation of comparison function in
> pairing heap used as priority queue for KNN. It used plain float
> comparison, which doesn't handle Inf and Nan values well. Attached
> patch replaced it
On Sun, Sep 01, 2019 at 08:07:06PM +0200, Fabien COELHO wrote:
> They allow to quickly do performance tests, for me it is useful to keep it
> around, but you are the committer, you do as you feel.
If there are more voices for having that in core, we could consider
it. For now I have added that
I wrote:
> As far as 4) goes, I think the code in ExtractReplicaIdentity is pretty
> duff anyway, because it doesn't bother to check for the defined failure
> return for RelationIdGetRelation. But if we're concerned about the
> cost of recalculating this stuff per-row, couldn't we cache it a
David Fetter writes:
> - It's broadly useful.
Maybe. Whether it can be argued that it's so broadly useful as
to justify being on-by-default is not clear.
> - Right now, the barrier for turning it on is quite high. In addition
> to being non-core, which is already a pretty high barrier at a
Chapman Flack writes:
> I don't mean "overload objectSubId" in any ObjectAddress that PG code
> would ever see. I am only thinking of a data structure of my own that
> is ObjectAddress-like and has all three components available all the
> time, and for an object that's a type, I would find it
Hi
ne 1. 9. 2019 v 20:00 odesílatel David Fetter napsal:
> Folks,
>
> I'd like to $Subject, on by default, with a switch to turn it off for
> those really at the outer edges of performance. Some reasons include:
>
> - It's broadly useful.
> - Right now, the barrier for turning it on is quite
ne 1. 9. 2019 v 20:48 odesílatel David Fetter napsal:
> On Sun, Sep 01, 2019 at 08:12:15PM +0200, Pavel Stehule wrote:
> > Hi
> >
> > ne 1. 9. 2019 v 20:00 odesílatel David Fetter napsal:
> >
> > > Folks,
> > >
> > > I'd like to $Subject, on by default, with a switch to turn it off for
> > >
News from Fabien's bleeding edge compiler zoo: apparently GCC 10
20190831 thinks the tsearch test should produce different output than
20190824 did. It looks like the parsing of question marks change...
Indeed, that looks pretty strange.
I can't wait for next week's installment.
I'll
Andres Freund writes:
> On 2019-08-17 01:43:45 -0400, Tom Lane wrote:
>> Yeah ... see the discussion leading up to 9c703c169,
>> https://www.postgresql.org/message-id/flat/19465.1541636036%40sss.pgh.pa.us
>> We didn't pull the trigger on removing the CMD_DELETE exception here,
>> but I think the
Em dom, 1 de set de 2019 às 06:09, Erik Rijkers escreveu:
>
> The first 4 of these apply without error, but I can't get 0005 to apply.
> This is what I use:
>
Erik, I generate a new patch set with patience diff algorithm. It
seems it applies cleanly.
--
Euler Taveira
On Sat, Aug 24, 2019 at 3:19 AM Tomas Vondra
wrote:
> > Although “The Wei Hong Optimizer” was designed in the context of
> > Postgres, it became the standard approach for many of the parallel
> > query optimizers in industry."
>
> I assume this quote is from 30 years ago. I wonder if the claim is
Hi,
I don't mean "overload objectSubId" in any ObjectAddress that PG code
would ever see. I am only thinking of a data structure of my own that
is ObjectAddress-like and has all three components available all the
time, and for an object that's a type, I would find it handy to stash
a typmod
Hi
pg_basebackup -F t fails when fsync spends more time than tcp_user_timeout in
following environment.
[Environment]
Postgres 13dev (master branch)
Red Hat Enterprise Postgres 7.4
[Error]
$ pg_basebackup -F t --progress --verbose -h -D
pg_basebackup: initiating base backup, waiting for
On Mon, Sep 2, 2019 at 6:31 AM Tom Lane wrote:
> I wrote:
> > As far as 4) goes, I think the code in ExtractReplicaIdentity is pretty
> > duff anyway, because it doesn't bother to check for the defined failure
> > return for RelationIdGetRelation. But if we're concerned about the
> > cost of
Hi Fujita San,
Please find my comments inline below:
On Wed, Aug 28, 2019 at 3:52 PM Etsuro Fujita
wrote:
> On Fri, Aug 16, 2019 at 10:25 PM Etsuro Fujita
> wrote:
> >
[... skipped ..]
>
> About the attached:
>
> * The attached patch modified try_partitionwise_join() so that we call
>
On Fri, Aug 2, 2019 at 10:42 PM Thomas Munro wrote:
> On Thu, Jul 25, 2019 at 1:11 PM Thomas Munro wrote:
> > On Thu, Jul 25, 2019 at 12:42 PM Tom Lane wrote:
> > > Andres Freund writes:
> > > > On 2019-07-24 20:34:39 -0400, Tom Lane wrote:
> > > >> Yeah, I would absolutely NOT recommend that
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