| Lists: | pgsql-sql |
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| From: | Markus Schaber <schabi(at)logix-tt(dot)com> |
|---|---|
| To: | PostgreSQL SQL List <pgsql-sql(at)postgresql(dot)org> |
| Subject: | no notnull values, invalid stats? |
| Date: | 2006-02-06 11:58:07 |
| Message-ID: | 43E739CF.6030908@logix-tt.com |
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| Lists: | pgsql-sql |
Hello,
The following message occasionally appears in my postgresql log - from
temporal corellation, it might be caused by autovacuum.
NOTICE: no notnull values, invalid stats
Is that anything I should care about?
I'm running debianized postgresql 8.1.0-3.
Markus
--
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf. | Software Development GIS
Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org
| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Markus Schaber <schabi(at)logix-tt(dot)com> |
| Cc: | PostgreSQL SQL List <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: no notnull values, invalid stats? |
| Date: | 2006-02-06 14:02:27 |
| Message-ID: | 20060206140227.GA5765@surnet.cl |
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| Lists: | pgsql-sql |
Markus Schaber wrote:
> Hello,
>
> The following message occasionally appears in my postgresql log - from
> temporal corellation, it might be caused by autovacuum.
>
> NOTICE: no notnull values, invalid stats
I see no such message in 8.1 sources. Is this verbatim or did you
translate it?
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
| From: | Markus Schaber <schabi(at)logix-tt(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Cc: | PostgreSQL SQL List <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: no notnull values, invalid stats? |
| Date: | 2006-02-06 14:32:32 |
| Message-ID: | 43E75E00.8050105@logix-tt.com |
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| Lists: | pgsql-sql |
Hi, Alvaro,
Alvaro Herrera wrote:
>>The following message occasionally appears in my postgresql log - from
>>temporal corellation, it might be caused by autovacuum.
>>
>>NOTICE: no notnull values, invalid stats
>
> I see no such message in 8.1 sources. Is this verbatim or did you
> translate it?
It is verbatim from /var/log/postgresql/postgresql-8.1-main.log.
But I have PostGIS installed in some of the databases, so it might be
from there.
Markus
--
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf. | Software Development GIS
Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org
| From: | Michael Fuhr <mike(at)fuhr(dot)org> |
|---|---|
| To: | Markus Schaber <schabi(at)logix-tt(dot)com> |
| Cc: | Alvaro Herrera <alvherre(at)commandprompt(dot)com>, PostgreSQL SQL List <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: no notnull values, invalid stats? |
| Date: | 2006-02-06 17:35:24 |
| Message-ID: | 20060206173523.GA16445@winnie.fuhr.org |
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| Lists: | pgsql-sql |
On Mon, Feb 06, 2006 at 03:32:32PM +0100, Markus Schaber wrote:
> Alvaro Herrera wrote:
> >>The following message occasionally appears in my postgresql log - from
> >>temporal corellation, it might be caused by autovacuum.
> >>
> >>NOTICE: no notnull values, invalid stats
> >
> > I see no such message in 8.1 sources. Is this verbatim or did you
> > translate it?
>
> It is verbatim from /var/log/postgresql/postgresql-8.1-main.log.
>
> But I have PostGIS installed in some of the databases, so it might be
> from there.
That is indeed a PostGIS message; it's in compute_geometry_stats()
in lwgeom/lwgeom_estimate.c. I think it means that during an
analyze, all of the sampled rows had NULL values in their geometry
columns (i.e., no not-NULL values were found); that would explain
the correlation with autovacuum. Here's an example that elicits
the notice:
postgis=> CREATE TABLE foo ();
CREATE TABLE
postgis=> SELECT AddGeometryColumn('foo', 'geom', -1, 'GEOMETRY', 2);
addgeometrycolumn
------------------------------------------------
public.foo.geom SRID:-1 TYPE:GEOMETRY DIMS:2
(1 row)
postgis=> INSERT INTO foo VALUES (NULL);
INSERT 0 1
postgis=> ANALYZE foo;
NOTICE: no notnull values, invalid stats
ANALYZE
postgis=> UPDATE foo SET geom = GeomFromText('POINT(0 0)');
UPDATE 1
postgis=> ANALYZE foo;
ANALYZE
--
Michael Fuhr