On Fri, Sep 16, 2011 at 07:27:33PM +0200, Andres Freund wrote:
many tuples does the table have. Those statistics are only updated every now
and then though.
So it uses those old stats to check how many tuples are normally stored on a
page and then uses that to extrapolate the number of
hello
sorry for late assign to discussion.
I don't think so using NULL instead INF is a good idea.
Regards
Pavel Stehule
2011/9/19 Jeff Davis pg...@j-davis.com:
On Sun, 2011-09-18 at 18:08 +0200, Erik Rijkers wrote:
Below are 2 changes. The first change is an elog saying 'lower' instead of
Hi,
I am trying to cross-compile PostgreSQL 9.0.4 and a few
3rd-party external modules using Mingw32-w64 on Fedora 15
for 64-bit Windows. 64-bit Wine can be used to run the
64-bit pg_config.exe under Linux, so the USE_PGXS=1
machinery works. However, mingw64-make fails with the
following error:
On sön, 2011-09-18 at 12:21 -0400, Tom Lane wrote:
Peter Eisentraut pete...@gmx.net writes:
On fre, 2011-09-16 at 10:57 -0400, Tom Lane wrote:
So it looks like it behooves us to cater for oom_score_adj in the
future. The simplest, least risky change that I can think of is to
On mån, 2011-09-19 at 10:16 +0200, Boszormenyi Zoltan wrote:
[zozo@localhost postgis-1.5.3]$ mingw64-make
make -C liblwgeom
make[1]: Entering directory
`/home/zozo/Schönig-számlák/w64/nsis/9.0/postgis-1.5.3/liblwgeom'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory
On Mon, Sep 19, 2011 at 11:27 AM, Peter Eisentraut pete...@gmx.net wrote:
On mån, 2011-09-19 at 10:16 +0200, Boszormenyi Zoltan wrote:
[zozo@localhost postgis-1.5.3]$ mingw64-make
make -C liblwgeom
make[1]: Entering directory
`/home/zozo/Schönig-számlák/w64/nsis/9.0/postgis-1.5.3/liblwgeom'
2011-09-19 10:27 keltezéssel, Peter Eisentraut írta:
On mån, 2011-09-19 at 10:16 +0200, Boszormenyi Zoltan wrote:
[zozo@localhost postgis-1.5.3]$ mingw64-make
make -C liblwgeom
make[1]: Entering directory
`/home/zozo/Schönig-számlák/w64/nsis/9.0/postgis-1.5.3/liblwgeom'
make[1]: Nothing to
Is it feasible to implement the CORRESPONDING [BY (expr_list)] statement in
set operations by the following changes:
i) In analyze.c:transformSetOperationStmt after parsing left and right
queries as subnodes to a set operation tree,
a) CORRESPONDING: Find matching column targets from both
Hello everyone,
I'm implementing a CUDA based sorting on PostgreSQL, and I believe it
can improve the ORDER BY statement performance in 4 to 10 times. I
already have a generic CUDA sort that performs around 10 times faster
than std qsort. I also managed to load CUDA into pgsql.
Since I'm new to
On 19 September 2011 13:11, Vitor Reus vitor.r...@gmail.com wrote:
Hello everyone,
I'm implementing a CUDA based sorting on PostgreSQL, and I believe it
can improve the ORDER BY statement performance in 4 to 10 times. I
already have a generic CUDA sort that performs around 10 times faster
* Benjamin LaHaise (b...@kvack.org) wrote:
For such tables, can't Postgres track the size of the file internally? I'm
assuming it's keeping file descriptors open on the tables it manages, in
which case when it writes to a file to extend it, the internally stored size
could be updated. Not
On Mon, Sep 19, 2011 at 8:31 AM, Stephen Frost sfr...@snowman.net wrote:
* Benjamin LaHaise (b...@kvack.org) wrote:
For such tables, can't Postgres track the size of the file internally? I'm
assuming it's keeping file descriptors open on the tables it manages, in
which case when it writes to
On Mon, Sep 19, 2011 at 1:51 AM, Jeff Davis pg...@j-davis.com wrote:
select '[ 2 , NULL )'::int4range;
ERROR: NULL range boundaries are not supported
LINE 1: select '[ 2 , NULL )'::int4range;
I think this might require more opinions. There is a trade-off here
between convenience and
On 19 September 2011 14:32, Vitor Reus vitor.r...@gmail.com wrote:
2011/9/19 Thom Brown t...@linux.com:
On 19 September 2011 13:11, Vitor Reus vitor.r...@gmail.com wrote:
Hello everyone,
I'm implementing a CUDA based sorting on PostgreSQL, and I believe it
can improve the ORDER BY statement
+1 for a closed mailing list. It's a bit annoying to have to do such
a thing, but it's not like we haven't got other closed lists for
appropriate purposes. I guess the real question is, exactly what will
be the requirements for joining?
Well, one requirement would be agreeing not to share
On Mon, Sep 19, 2011 at 1:11 PM, Vitor Reus vitor.r...@gmail.com wrote:
Since I'm new to pgsql development, I replaced the code of pgsql
qsort_arg to get used with the way postgres does the sort. The problem
is that I can't use the qsort_arg_comparator comparator function on
GPU, I need to
Peter Eisentraut pete...@gmx.net writes:
On sön, 2011-09-18 at 12:21 -0400, Tom Lane wrote:
But having said that, it wouldn't be very hard to arrange things so that
if you did have both symbols defined, the code would only attempt to
write oom_adj if it had failed to write oom_score_adj;
Hi, I'm Enrico,
I wrote a little pg_dump patch,
I have introduced a new option to have a database dump without comments,
no 'COMMENT ON' are written on the dump if my new option is selected.
If this little piece of code can interest somebody, I'll be happy to
share it with the community,
On 09/19/2011 10:12 AM, Greg Stark wrote:
With the GPU I'm curious to see how well
it handles multiple processes contending for resources, it might be a
flashy feature that gets lots of attention but might not really be
very useful in practice. But it would be very interesting to see.
The
I have a need to test timeouts in JDBC, is there a query that is
guaranteed not to return ?
Dave Cramer
dave.cramer(at)credativ(dot)ca
http://www.credativ.ca
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On 19 September 2011 15:36, Greg Smith g...@2ndquadrant.com wrote:
On 09/19/2011 10:12 AM, Greg Stark wrote:
With the GPU I'm curious to see how well
it handles multiple processes contending for resources, it might be a
flashy feature that gets lots of attention but might not really be
very
On Mon, Sep 19, 2011 at 3:36 PM, Greg Smith g...@2ndquadrant.com wrote:
The main problem here is that the sort of hardware commonly used for
production database servers doesn't have any serious enough GPU to support
CUDA/OpenCL available
Of course that could change if adding a GPU would help
On 09/05/2011 07:52 PM, Tomas Vondra wrote:
If your logging criteria for the write phase was display a message any
time more than 30 seconds have passed since last seeing one, that would
give you only a few lines of output in a boring, normal
checkpoint--certainly less than the 9 in-progress
On 09/19/2011 09:50 AM, Josh Berkus wrote:
FWIW, the fact that the drafts *are* confidential is symptomatic of
everything which is wrong with the ISO.
Maybe it's time for an open source SQL standard, one not controlled by
the big guys and their IP claims.
Joe
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Dave Cramer p...@fastcrypt.com writes:
I have a need to test timeouts in JDBC, is there a query that is
guaranteed not to return ?
You could just do an unconstrained join between several large tables.
Or select pg_sleep(largevalue), depending on whether you'd like the
backend to be spitting
On 09/19/2011 10:34 AM, Enrico Pirozzi wrote:
Hi, I'm Enrico,
I wrote a little pg_dump patch,
I have introduced a new option to have a database dump without comments,
no 'COMMENT ON' are written on the dump if my new option is selected.
If this little piece of code can interest somebody, I'll
-BEGIN PGP SIGNED MESSAGE-
Hash: RIPEMD160
I have a need to test timeouts in JDBC, is there a query that is
guaranteed not to return ?
Not *never*, but close enough:
select pg_sleep();
Or if you want to be strict:
CREATE FUNCTION
On 19 September 2011 15:54, Greg Stark st...@mit.edu wrote:
On Mon, Sep 19, 2011 at 3:36 PM, Greg Smith g...@2ndquadrant.com wrote:
The main problem here is that the sort of hardware commonly used for
production database servers doesn't have any serious enough GPU to support
CUDA/OpenCL
On Sep19, 2011, at 16:48 , Dave Cramer wrote:
I have a need to test timeouts in JDBC, is there a query that is
guaranteed not to return ?
WITH RECURSIVE infinite(value) AS (SELECT 1 UNION ALL SELECT * FROM infinite)
SELECT * FROM infinite
If you declare a cursor for this statement, it will
On 19 September 2011 16:10, Thom Brown t...@linux.com wrote:
On 19 September 2011 15:54, Greg Stark st...@mit.edu wrote:
On Mon, Sep 19, 2011 at 3:36 PM, Greg Smith g...@2ndquadrant.com wrote:
The main problem here is that the sort of hardware commonly used for
production database servers
On 19.09.2011 15:50, Josh Berkus wrote:
+1 for a closed mailing list. It's a bit annoying to have to do such
a thing, but it's not like we haven't got other closed lists for
appropriate purposes. I guess the real question is, exactly what will
be the requirements for joining?
Well, one
Greg Smith g...@2ndquadrant.com writes:
One thing I am trying to avoid here is needing to check the system clock
after every buffer write.
On machines where gettimeofday is slow (and last I heard there were
still lots of them), any such thing would be a disaster
performance-wise. I'm still
Greg Stark st...@mit.edu writes:
That said, to help in the case I described you would have to implement
the tapesort algorithm on the GPU as well.
I think the real problem would be that we are seldom sorting just the
key values. If you have to push the tuples through the GPU too, your
savings
What's the use case for not dumping comments? At first glance it seems a
very odd thing to do.
cheers
andrew
I wrote this little patch, becuse my customer doesn't want to have
comments on the production db. It's not my choice
Regards,
Enrico
--
That's one small step for man; one
On Sep19, 2011, at 15:33 , Robert Haas wrote:
On Mon, Sep 19, 2011 at 1:51 AM, Jeff Davis pg...@j-davis.com wrote:
select '[ 2 , NULL )'::int4range;
ERROR: NULL range boundaries are not supported
LINE 1: select '[ 2 , NULL )'::int4range;
I think this might require more opinions. There is a
On 09/19/2011 11:23 AM, Enrico Pirozzi wrote:
What's the use case for not dumping comments? At first glance it seems a
very odd thing to do.
I wrote this little patch, becuse my customer doesn't want to have
comments on the production db. It's not my choice
Then use pg_restore
Patching pg_dump like this seems like the wrong way to go.
Ok ;)
Thank you very much
Enrico
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-BEGIN PGP SIGNED MESSAGE-
Hash: RIPEMD160
I wrote this little patch, becuse my customer doesn't want to have
comments on the production db. It's not my choice
Then use pg_restore --use-list to filter them out, and you won't need a
Or just strip them out after the fact with a
On Mon, 2011-09-19 at 17:23 +0200, Florian Pflug wrote:
The one reason I can see in favour of supporting N-U-L-L there is
compatibility with arrays.
But arrays actually do store and produce NULLs; ranges don't.
I've recently had the questionable pleasure
of writing PHP functions to parse
2011/9/19 Thom Brown t...@linux.com
Is your aim to have this committed into core PostgreSQL, or just for
your own version? If it's the former, I don't anticipate any
enthusiasm from the hacker community.
This is a research thesis and I'm not confident to commit it on the
core just by myself.
Ok, but with this hack I need 2 databases, one with comments and
another without comments.
I prefer to have only one db with comments and choice to have a dump
with comments or without comments.
regards,
Enrico
2011/9/19 Greg Sabino Mullane g...@turnstep.com:
-BEGIN PGP SIGNED MESSAGE-
On Mon, Sep 19, 2011 at 05:12:15PM +0200, Florian Pflug wrote:
On Sep19, 2011, at 16:48 , Dave Cramer wrote:
I have a need to test timeouts in JDBC, is there a query that is
guaranteed not to return ?
WITH RECURSIVE infinite(value) AS (SELECT 1 UNION ALL SELECT * FROM infinite)
SELECT *
Robert Haas robertmh...@gmail.com wrote:
Jeff Davis pg...@j-davis.com wrote:
select '[ 2 , NULL )'::int4range;
ERROR: NULL range boundaries are not supported
LINE 1: select '[ 2 , NULL )'::int4range;
I think this might require more opinions. There is a trade-off
here between convenience
On Sep19, 2011, at 17:59 , David Fetter wrote:
On Mon, Sep 19, 2011 at 05:12:15PM +0200, Florian Pflug wrote:
My first try, BTW, was
WITH RECURSIVE infinite(value) AS (SELECT 1 UNION ALL SELECT 1)
SELECT * FROM infinite
but that returns only two rows. I'd have expected it to returns an
On Mon, Sep 19, 2011 at 10:58:49AM -0400, Joe Abbate wrote:
On 09/19/2011 09:50 AM, Josh Berkus wrote:
FWIW, the fact that the drafts *are* confidential is symptomatic
of everything which is wrong with the ISO.
Maybe it's time for an open source SQL standard, one not controlled
by the big
On Mon, Sep 19, 2011 at 7:11 AM, Vitor Reus vitor.r...@gmail.com wrote:
Hello everyone,
I'm implementing a CUDA based sorting on PostgreSQL, and I believe it
can improve the ORDER BY statement performance in 4 to 10 times. I
already have a generic CUDA sort that performs around 10 times
On Mon, Sep 19, 2011 at 10:36 AM, Greg Smith g...@2ndquadrant.com wrote:
Intel's next generation Ivy Bridge chipset, expected for the spring of 2012,
is going to add support for OpenCL to the built-in motherboard GPU. We may
eventually see that trickle into the server hardware side of things
On Mon, Sep 19, 2011 at 11:23 AM, Florian Pflug f...@phlo.org wrote:
On Sep19, 2011, at 15:33 , Robert Haas wrote:
On Mon, Sep 19, 2011 at 1:51 AM, Jeff Davis pg...@j-davis.com wrote:
select '[ 2 , NULL )'::int4range;
ERROR: NULL range boundaries are not supported
LINE 1: select '[ 2 , NULL
On Sep19, 2011, at 17:46 , Jeff Davis wrote:
On Mon, 2011-09-19 at 17:23 +0200, Florian Pflug wrote:
The one reason I can see in favour of supporting N-U-L-L there is
compatibility with arrays.
But arrays actually do store and produce NULLs; ranges don't.
Hm, yeah, granted. But OTOH,
On 09/19/2011 12:20 PM, David Fetter wrote:
On Mon, Sep 19, 2011 at 10:58:49AM -0400, Joe Abbate wrote:
On 09/19/2011 09:50 AM, Josh Berkus wrote:
FWIW, the fact that the drafts *are* confidential is symptomatic
of everything which is wrong with the ISO.
Maybe it's time for an open source
On Mon, Sep 19, 2011 at 12:20 PM, David Fetter da...@fetter.org wrote:
On Mon, Sep 19, 2011 at 10:58:49AM -0400, Joe Abbate wrote:
On 09/19/2011 09:50 AM, Josh Berkus wrote:
FWIW, the fact that the drafts *are* confidential is symptomatic
of everything which is wrong with the ISO.
Maybe
On Mon, 2011-09-19 at 11:00 -0500, Kevin Grittner wrote:
On a practical level, our shop is already effectively doing this.
We have several tables where part of the primary key is effective
date and there is a null capable expiration date -- with a NULL
meaning that no expiration date has been
Here is my review for EXPLAIN and nfiltered
(http://archives.postgresql.org/message-id/4e6e9e83.7070...@2ndquadrant.com)
- Is the patch in context diff format?
It's in git diff format
- Does it apply cleanly to the current git master?
Yes
- Does it include reasonable tests, necessary doc
On 09/19/2011 12:40 PM, Christopher Browne wrote:
On Mon, Sep 19, 2011 at 12:20 PM, David Fetter da...@fetter.org wrote:
Actually, I think it *is* a bad idea, as it would require construction
from whole cloth of kinds of mostly political infrastructure that we
don't have, as a community and
On Mon, Sep 19, 2011 at 12:51 PM, Marc Cousin cousinm...@gmail.com wrote:
Here is my review for EXPLAIN and nfiltered
(http://archives.postgresql.org/message-id/4e6e9e83.7070...@2ndquadrant.com)
Please add this review to the CommitFest app here:
* Thom Brown (t...@linux.com) wrote:
But nVidia does produce a non-graphics-oriented GPGPU line called
Tesla dedicated to such processing.
Just as a side-note, I've got a couple Tesla's that aren't doing
terribly much at the moment and they're in a Linux 'server'-type box
from Penguin
Tom Lane t...@sss.pgh.pa.us writes:
On machines where gettimeofday is slow (and last I heard there were
still lots of them), any such thing would be a disaster
performance-wise. I'm still afraid to add more gettimeofday's into the
query parse/plan/execute code path, even though it would
Christopher Browne cbbro...@gmail.com writes:
The nearest sort of thing that *could* conceivably be sensible would
be to participate in UnQL
http://www.unqlspec.org/display/UnQL/Home. That's early enough in
its process that it's likely somewhat guidable, and, with the
popularity of NoSQL,
On 09/19/2011 10:53 AM, Thom Brown wrote:
But couldn't that also be seen as a chicken/egg situation?
The chicken/egg problem here is a bit deeper than just no one offers
GPUs because no one wants them on server systems. One of the reasons
there aren't more GPUs in typical database server
2011/9/19 Robert Haas robertmh...@gmail.com:
On Mon, Sep 19, 2011 at 12:51 PM, Marc Cousin cousinm...@gmail.com wrote:
Here is my review for EXPLAIN and nfiltered
(http://archives.postgresql.org/message-id/4e6e9e83.7070...@2ndquadrant.com)
Please add this review to the CommitFest app here:
On Mon, Sep 19, 2011 at 3:10 PM, Marc Cousin cousinm...@gmail.com wrote:
2011/9/19 Robert Haas robertmh...@gmail.com:
On Mon, Sep 19, 2011 at 12:51 PM, Marc Cousin cousinm...@gmail.com wrote:
Here is my review for EXPLAIN and nfiltered
On Sep 19, 2011, at 5:16 PM, Tom Lane wrote:
Greg Stark st...@mit.edu writes:
That said, to help in the case I described you would have to implement
the tapesort algorithm on the GPU as well.
I think the real problem would be that we are seldom sorting just the
key values. If you have to
2011/9/19 Greg Smith g...@2ndquadrant.com:
On 09/19/2011 10:53 AM, Thom Brown wrote:
But couldn't that also be seen as a chicken/egg situation?
The chicken/egg problem here is a bit deeper than just no one offers GPUs
because no one wants them on server systems. One of the reasons there
On Sun, Sep 18, 2011 at 02:08:01PM -0500, David Rinaldi wrote:
I tried to apply the Grouping Sets Patch to 8.4, but received several Hunks
failed messages, does anyone know if the failing hunks can be applied
manually? Or what version they were applied to specifically?
Your best bet is
On 09/19/2011 10:58 AM, Joe Abbate wrote:
Maybe it's time for an open source SQL standard, one not controlled by
the big guys and their IP claims.
Not spending as much time sitting in meetings and fighting with other
vendors is one of the competitive advantages PostgreSQL development has
2011/9/19 Greg Smith g...@2ndquadrant.com:
On 09/19/2011 10:58 AM, Joe Abbate wrote:
Maybe it's time for an open source SQL standard, one not controlled by
the big guys and their IP claims.
Not spending as much time sitting in meetings and fighting with other
vendors is one of the
Hi Greg,
On 09/19/2011 04:44 PM, Greg Smith wrote:
Not spending as much time sitting in meetings and fighting with other
vendors is one of the competitive advantages PostgreSQL development has
vs. the big guys. There needs to be a pretty serious problem with
your process before adding
Folks,
Can we move the discussion about hypothetical new standards groups over
to -advocacy? This is getting a bit off-topic for -hackers.
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PostgreSQL Experts Inc.
http://pgexperts.com
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Hi,
I don't find the following error message very helpful:
=# create collation sr_SP (LOCALE ='sr_SB.utf8');
ERROR: could not create locale sr_SB.utf8: No such file or directory
It's correct in that it shouldn't be able to create the locale since
it's not installed, but what file can't it
On Monday, September 19, 2011 9:20 AM, David Fetter da...@fetter.org
wrote:
On Mon, Sep 19, 2011 at 10:58:49AM -0400, Joe Abbate wrote:
On 09/19/2011 09:50 AM, Josh Berkus wrote:
FWIW, the fact that the drafts *are* confidential is symptomatic
of everything which is wrong with the ISO.
On Tue, Sep 20, 2011 at 03:24, Thom Brown t...@linux.com wrote:
ERROR: could not create locale sr_SB.utf8: No such file or directory
It's correct in that it shouldn't be able to create the locale since
it's not installed, but what file can't it find? What is the user
supposed to do with
Paul,
I was able to apply the patch to 9.0.4 and so far looks good. My Oracle
results match. Nice.
But, when trying to calculate some percentages and control some rounding,
the results are coming back as null for some reason. I have tried casting,
to_char, etc to try to get them to show up..no
Recent discussions on the threads Double sorting split patch and
CUDA sorting raised the possibility that there could be significant
performance optimisation low-hanging fruit picked by having the
executor treat integers and floats as a special case during sorting,
avoiding going to the trouble of
Marti Raudsepp ma...@juffo.org writes:
On Tue, Sep 20, 2011 at 03:24, Thom Brown t...@linux.com wrote:
ERROR: Â could not create locale sr_SB.utf8: No such file or directory
It's correct in that it shouldn't be able to create the locale since
it's not installed, but what file can't it find? Â
Peter Geoghegan pe...@2ndquadrant.com writes:
Once the cache has been warmed, explain analyze very consistently
reports a runtime of 123ms for this query on master/HEAD, which varies
+/- 1 ms, with a few outliers of maybe +/- 2ms. However, when I apply
this patch, that goes down to 107ms +/-
FYI, one of the main goals of the Muldis D language is to be an open source SQL
standard. It is intended to satisfy both relational and NoSQL folks, and
predates UnQL significantly.
Muldis D has always been published openly and is comprehensive enough to cover
anything that SQL does, and
On Mon, Sep 19, 2011 at 10:04 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Marti Raudsepp ma...@juffo.org writes:
On Tue, Sep 20, 2011 at 03:24, Thom Brown t...@linux.com wrote:
ERROR: could not create locale sr_SB.utf8: No such file or directory
It's correct in that it shouldn't be able to create
Hello
2011/9/20 David Rinaldi edwbro...@gmail.com:
Paul,
I was able to apply the patch to 9.0.4 and so far looks good. My Oracle
results match. Nice.
But, when trying to calculate some percentages and control some rounding,
the results are coming back as null for some reason. I have
Robert Haas robertmh...@gmail.com writes:
On Mon, Sep 19, 2011 at 10:04 PM, Tom Lane t...@sss.pgh.pa.us wrote:
We could possibly add a HINT suggesting that the locale isn't installed,
but I don't see that we could offer any useful generic advice about how
to install it. I'm also worried about
On Mon, Sep 19, 2011 at 08:31:00AM -0400, Stephen Frost wrote:
* Benjamin LaHaise (b...@kvack.org) wrote:
For such tables, can't Postgres track the size of the file internally? I'm
assuming it's keeping file descriptors open on the tables it manages, in
which case when it writes to a
This is one way to prevent the kernel warning message without having to
introduce a new constant. Scale the old oom_adj-style value the same way
the kernel internally does it and use that instead if oom_score_adj is
available for writing.
Signed-off-by: Dan McGee d...@archlinux.org
---
This
On Mon, Sep 19, 2011 at 3:11 PM, Dan McGee d...@archlinux.org wrote:
This is one way to prevent the kernel warning message without having to
introduce a new constant. Scale the old oom_adj-style value the same way
the kernel internally does it and use that instead if oom_score_adj is
available
As has been mentioned a couple times, we're well overdue for updates of
the back branches. Seems like time to get that done, so we'll be
wrapping 8.2.x and up this Thursday for release Monday the 26th.
regards, tom lane
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