2010/10/11 Tom Lane t...@sss.pgh.pa.us:
Pavel Stehule pavel.steh...@gmail.com writes:
2010/10/4 Itagaki Takahiro itagaki.takah...@gmail.com:
We don't have commands for display a list of such variables and \echo is
not tab-completed even with the patch. Only supported by \set might be
a bit
Folks,
Please find enclosed a WIP patch from one of my co-workers intended to
support JDBC's setQueryTimeout, along with the patch for JDBC that
uses it.
I think this is an especially handy capability, and goes to the number
one TODO on the JDBC compliance list.
2010/10/10 Tom Lane t...@sss.pgh.pa.us:
Dean Rasheed dean.a.rash...@gmail.com writes:
In the meantime, the attached variation of the patch fixes the temp
file issue and will support all 3 cases. It gives OK performance for
(1) and (2), and poor performance for (3). That could be viewed as a
Tom Lane t...@sss.pgh.pa.us writes:
Might have something to do with using the same OID for the catalog
and its index ...
Ahah, that's how obvious it was, thank you. I feel ashamed, but at the
same time, thanks to your answer, it now feels like the week-end was a
good preparatory step for
* James Cloos:
I'm reading this a bit late, but...
We (Xorg) found that ignoring:
*~
*.bak
*.patch
in addition to the files generated by building is very helpful.
I tend to put those into .git/info/exclude. They are somewhat
developer-specific, after all.
--
Florian Weimer
On 10 October 2010 19:06, Tom Lane t...@sss.pgh.pa.us wrote:
Applied with revisions.
Brilliant! Thank you very much.
* I took out this change in planmain.c:
+ /*
+ * If the query target is a VIEW, it won't be in the jointree, but we
+ * need a dummy RelOptInfo node for
On 10 October 2010 22:16, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of percentile_cont(0.5)
which *is* in the standard. What I read in SQL:2008 is that
percentile_cont is defined for all numeric
2010/10/11 Dean Rasheed dean.a.rash...@gmail.com:
On 10 October 2010 22:16, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of percentile_cont(0.5)
which *is* in the standard. What I read in SQL:2008
On 11 October 2010 10:55, Pavel Stehule pavel.steh...@gmail.com wrote:
BTW, why has percentile been removed from this patch? As the more
general, and SQL standard function, that would seem to be the more
useful one to include. Upthread it was mentioned that there is already
an ntile window
On Sun, Oct 10, 2010 at 5:16 PM, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of percentile_cont(0.5)
which *is* in the standard. What I read in SQL:2008 is that
percentile_cont is defined for all
On Sat, Oct 9, 2010 at 3:33 AM, Simon Riggs si...@2ndquadrant.com wrote:
On Fri, 2010-10-08 at 12:23 -0400, Robert Haas wrote:
It seems like it would be more helpful if you were working on
implementing a design that had more than one vote. As far as I can
tell, we have rough consensus that
Is there something like that in Kdevelop? I dont use CLI editors much.
On Mon, Oct 11, 2010 at 7:55 AM, David Christensen da...@endpoint.comwrote:
On Oct 10, 2010, at 12:21 PM, Vaibhav Kaushal wrote:
Thanks to both hitoshi and tom for your replies.
I think I need to look into the
On Sun, 2010-09-19 at 17:36 -0400, Tom Lane wrote:
While building 3rd party RPMs using PGXS, even if I specify docdir
in
Makefile, README.* files are installed to this directory, which
breaks
parallel installation path as of 9.0+
Maybe you need to fool with MODULEDIR. See
Greg,
to me it looks like we have very similar goals, but start from different
preconditions. I absolutely agree with you given the preconditions you
named.
On 10/08/2010 10:04 PM, Greg Smith wrote:
How is that a new problem? It's already possible to end up with a
standby pair that has
Hi,
I was wondering what is the advantage of having hint bits for OLAP
-style workloads, that is when the number of transactions is not
that high.
If I got it right, in 10 pg_clog pages we can store the status for more
than 32 transactions. That's a lot, in a very small space
(80KB?).
So I
David Fetter da...@fetter.org wrote:
Please find enclosed a WIP patch from one of my co-workers
intended to support JDBC's setQueryTimeout, along with the patch
for JDBC that uses it.
I agree that it would be very nice to support this JDBC feature, but
I'm not clear on why this can't be
Dean Rasheed dean.a.rash...@gmail.com writes:
On 10 October 2010 22:16, Tom Lane t...@sss.pgh.pa.us wrote:
BTW, as far as the implementation issues go, telling tuplesort that it
can use gigabytes of memory no matter what seems quite unacceptable.
Put this thing into a hash aggregation and
Robert Haas robertmh...@gmail.com writes:
On Sun, Oct 10, 2010 at 5:16 PM, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of percentile_cont(0.5)
which *is* in the standard. What I read in SQL:2008
Leonardo Francalanci m_li...@yahoo.it writes:
I was wondering what is the advantage of having hint bits for OLAP
-style workloads, that is when the number of transactions is not
that high.
If I got it right, in 10 pg_clog pages we can store the status for more
than 32 transactions.
Kevin Grittner kevin.gritt...@wicourts.gov writes:
David Fetter da...@fetter.org wrote:
Please find enclosed a WIP patch from one of my co-workers
intended to support JDBC's setQueryTimeout, along with the patch
for JDBC that uses it.
I agree that it would be very nice to support this JDBC
On Mon, Oct 11, 2010 at 16:17, Tom Lane t...@sss.pgh.pa.us wrote:
Kevin Grittner kevin.gritt...@wicourts.gov writes:
David Fetter da...@fetter.org wrote:
Please find enclosed a WIP patch from one of my co-workers
intended to support JDBC's setQueryTimeout, along with the patch
for JDBC that
On Mon, Oct 11, 2010 at 10:08 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Robert Haas robertmh...@gmail.com writes:
On Sun, Oct 10, 2010 at 5:16 PM, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of
Magnus Hagander mag...@hagander.net writes:
On Mon, Oct 11, 2010 at 16:17, Tom Lane t...@sss.pgh.pa.us wrote:
... and, if you are seriously expecting to have that happen, why the
patch was submitted to pgsql-jdbc not pgsql-hackers?
To be fair to David, it was sent to *both* pgsql-jdbc and
Reduction of contention for pg_clog access, for one thing. If you read
the archives, you'll find that pg_clog access contention has been shown
to be one cause of context swap storms. Having to go to clog for
every single tuple access would make that orders of magnitude worse.
Ok; is it
On Mon, Oct 11, 2010 at 10:14 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Reduction of contention for pg_clog access, for one thing. If you read
the archives, you'll find that pg_clog access contention has been shown
to be one cause of context swap storms.
I wonder if we could improve this with
I wonder if we could improve this with some sort of process-local
cache - not to get rid of hint bits, just to reduce pg_clog
contention. We might easily end up testing the same XID many times
during the same table scan.
I guess that's my scenario... not that many transactions, so even
On 11 October 2010 15:03, Tom Lane t...@sss.pgh.pa.us wrote:
Dean Rasheed dean.a.rash...@gmail.com writes:
On 10 October 2010 22:16, Tom Lane t...@sss.pgh.pa.us wrote:
BTW, as far as the implementation issues go, telling tuplesort that it
can use gigabytes of memory no matter what seems quite
Dean Rasheed dean.a.rash...@gmail.com writes:
On 11 October 2010 15:03, Tom Lane t...@sss.pgh.pa.us wrote:
Reflecting on it, I think it'd be best to allow an agg to
provide an estimation function that'd be told the input data type and
expected number of rows --- even on a per-aggregate basis,
Robert Haas robertmh...@gmail.com writes:
On Mon, Oct 11, 2010 at 10:14 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Reduction of contention for pg_clog access, for one thing. If you read
the archives, you'll find that pg_clog access contention has been shown
to be one cause of context swap storms.
On Thu, Oct 7, 2010 at 7:20 AM, Shigeru HANADA
han...@metrosystems.co.jp wrote:
[ design for FDW ]
This seems mostly sensible.
In this step, optimizer calls FdwRoutine-GetStatistics() to get
estimated costs of the foreign scan. FDW can calculate costs by
itself with some statistics, or get
Devrim =?ISO-8859-1?Q?G=DCND=DCZ?= dev...@gunduz.org writes:
On Sun, 2010-09-19 at 17:36 -0400, Tom Lane wrote:
While building 3rd party RPMs using PGXS, even if I specify docdir in
Makefile, README.* files are installed to this directory, which breaks
parallel installation path as of 9.0+
On 11 October 2010 16:44, Tom Lane t...@sss.pgh.pa.us wrote:
Dean Rasheed dean.a.rash...@gmail.com writes:
On 11 October 2010 15:03, Tom Lane t...@sss.pgh.pa.us wrote:
Reflecting on it, I think it'd be best to allow an agg to
provide an estimation function that'd be told the input data type
Dean Rasheed dean.a.rash...@gmail.com writes:
The estimate of 200 x 8K is below work_mem, so it uses a hash
aggregate. In reality, each tuplesort allocates around 30K initially,
so it very quickly uses over 1GB. A better estimate for the aggregate
wouldn't improve this situation much.
Sure it
On 11 October 2010 18:37, Tom Lane t...@sss.pgh.pa.us wrote:
Dean Rasheed dean.a.rash...@gmail.com writes:
The estimate of 200 x 8K is below work_mem, so it uses a hash
aggregate. In reality, each tuplesort allocates around 30K initially,
so it very quickly uses over 1GB. A better estimate for
On Thu, Oct 7, 2010 at 2:05 PM, Josh Berkus j...@agliodbs.com wrote:
What is the procedure for adding a new synchronous standby in your
implementation? That is, how do we go from having a standby server with
an empty PGDATA to having a working synchronous standby?
I'll take a crack at
Dean Rasheed dean.a.rash...@gmail.com writes:
On 11 October 2010 18:37, Tom Lane t...@sss.pgh.pa.us wrote:
Sure it would: an estimate of 30K would keep the planner from using
hash aggregation.
Not if work_mem was 10MB.
And? If the memory requirement actually fits, you're in good shape.
On 11 October 2010 18:48, Tom Lane t...@sss.pgh.pa.us wrote:
Dean Rasheed dean.a.rash...@gmail.com writes:
On 11 October 2010 18:37, Tom Lane t...@sss.pgh.pa.us wrote:
Sure it would: an estimate of 30K would keep the planner from using
hash aggregation.
Not if work_mem was 10MB.
And? If
Dean Rasheed dean.a.rash...@gmail.com writes:
On 11 October 2010 18:48, Tom Lane t...@sss.pgh.pa.us wrote:
And? If the memory requirement actually fits, you're in good shape.
Yeah but the actual memory requirement, if it uses a hash aggregate,
is over 1GB, and could easily be much higher.
Robert,
I'll take a crack at answering these. I don't think that the
procedure for setting up a standby server is going to change much.
The idea is presumably that you set up an async standby more or less
as you do now and then make whatever configuration changes are
necessary to flip it to
On Mon, Oct 11, 2010 at 04:14:04PM +0530, Vaibhav Kaushal wrote:
Is there something like that in Kdevelop? I dont use CLI editors much.
KDevelop is listed as one of the editors that support ctags.
http://en.wikipedia.org/wiki/Ctags
Cheers,
David.
--
David Fetter da...@fetter.org
On 11 October 2010 19:05, Tom Lane t...@sss.pgh.pa.us wrote:
Dean Rasheed dean.a.rash...@gmail.com writes:
On 11 October 2010 18:48, Tom Lane t...@sss.pgh.pa.us wrote:
And? If the memory requirement actually fits, you're in good shape.
Yeah but the actual memory requirement, if it uses a
On Sun, Oct 10, 2010 at 2:16 PM, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of percentile_cont(0.5)
which *is* in the standard.
Uhmm, then why don't we implement that? We could provide median() as
Uhmm, then why don't we implement that? We could provide median() as a
short-cut but percentile_cont() doesn't sound much harder to implement
than median() and more general.
I could really use percentile_cont(0.9), actually, for query
response-time analysis.
--
On tor, 2010-10-07 at 12:45 +0900, KaiGai Kohei wrote:
* The logic is still unclear for me.
The check_hostname() immediately returns with false, if the resolved
remote hostname is NOT matched with the hostname described in pg_hba.conf.
If the resolved hostname is matched with the hostname
Hello
2010/10/11 Greg Stark gsst...@mit.edu:
On Sun, Oct 10, 2010 at 2:16 PM, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of percentile_cont(0.5)
which *is* in the standard.
Uhmm, then why don't
On Mon, Oct 11, 2010 at 2:07 PM, Josh Berkus j...@agliodbs.com wrote:
I'll take a crack at answering these. I don't think that the
procedure for setting up a standby server is going to change much.
The idea is presumably that you set up an async standby more or less
as you do now and then
On Mon, 2010-10-11 at 15:22 -0400, Robert Haas wrote:
This is a completely separate issue from making replication
synchronous. And, really? Useless for running read queries?
Absolutely. For a synch standby, you can't tolerate any standby delay
at all. This means that anywhere from
On Mon, Oct 11, 2010 at 4:01 PM, Jeff Davis pg...@j-davis.com wrote:
On Mon, 2010-10-11 at 15:22 -0400, Robert Haas wrote:
This is a completely separate issue from making replication
synchronous. And, really? Useless for running read queries?
Absolutely. For a synch standby, you can't
Obviously. I presume it'll be something like update postgresql.conf
or recovery.conf and run pg_ctl reload, but I haven't (yet, anyway)
verified the actual behavior of the patches, but if the above isn't
feasible then we have a problem.
Right. That's why I asked the question. Mind you, a
On Mon, 2010-10-11 at 16:07 -0400, Robert Haas wrote:
I was initially taken aback by the word useless as well. However, I
had trouble thinking of a use case that isn't better solved by sync rep
without HS, or async rep. I don't have the numbers either though, so
perhaps someone does have a
On Mon, Oct 11, 2010 at 5:40 PM, Josh Berkus j...@agliodbs.com wrote:
Obviously. I presume it'll be something like update postgresql.conf
or recovery.conf and run pg_ctl reload, but I haven't (yet, anyway)
verified the actual behavior of the patches, but if the above isn't
feasible then we
On Mon, Oct 11, 2010 at 7:16 PM, Jeff Davis pg...@j-davis.com wrote:
On Mon, 2010-10-11 at 16:07 -0400, Robert Haas wrote:
I was initially taken aback by the word useless as well. However, I
had trouble thinking of a use case that isn't better solved by sync rep
without HS, or async rep. I
(2010/10/12 3:34), Peter Eisentraut wrote:
On tor, 2010-10-07 at 12:45 +0900, KaiGai Kohei wrote:
* The logic is still unclear for me.
The check_hostname() immediately returns with false, if the resolved
remote hostname is NOT matched with the hostname described in pg_hba.conf.
If the
On Sun, 10 Oct 2010, Marko Tiikkaja wrote:
On 2010-10-07 5:21 AM +0300, Steve Singer wrote:
Since no one else has proposed a better idea and the commit fest is ticking
away I think you should go ahead and do that.
Here's a new version of the patch, deprecating pg_parse_and_rewrite.
I
That's probably not going to happen until we have a way to update
postgresql.conf via SQL. Which, I maintain, as I have maintained
before, is not going to happen until we get rid of the comments,
because otherwise absolutely any implementation anyone proposes will
get criticized for failing
On Mon, Oct 11, 2010 at 9:29 PM, Josh Berkus j...@agliodbs.com wrote:
What is your source for those numbers? They could be right, but I
simply don't know.
pg_bench tests with asynch rep and standby_delay = 0. Not rigorous, but
enough to show that there is a problem there. Doing pg_bench
On Mon, Oct 11, 2010 at 5:41 PM, Robert Haas robertmh...@gmail.com wrote:
That's probably not going to happen until we have a way to update
postgresql.conf via SQL. Which, I maintain, as I have maintained
before, is not going to happen until we get rid of the comments,
because otherwise
On Mon, Oct 11, 2010 at 9:44 PM, Greg Stark gsst...@mit.edu wrote:
On Mon, Oct 11, 2010 at 5:41 PM, Robert Haas robertmh...@gmail.com wrote:
That's probably not going to happen until we have a way to update
postgresql.conf via SQL. Which, I maintain, as I have maintained
before, is not going
It seems to me the conclusion of this discussion is unclear.
We commonly try to find out an approach that minimize code complexity
to understand and maintain, so the point of issue is clear, but we
still don't reach same conclusion, because both of two ideas have merits
and demerits each other.
On Mon, Oct 11, 2010 at 7:16 PM, Jeff Davis pg...@j-davis.com wrote:
On Mon, 2010-10-11 at 16:07 -0400, Robert Haas wrote:
It would be far better if we could decouple master cleanup from
standby cleanup, so that only the machine that actually has the old
query gets bloated. However, no
On Mon, Oct 11, 2010 at 9:58 PM, KaiGai Kohei kai...@ak.jp.nec.com wrote:
It seems to me the conclusion of this discussion is unclear.
We commonly try to find out an approach that minimize code complexity
to understand and maintain, so the point of issue is clear, but we
still don't reach
On Mon, Oct 11, 2010 at 10:17 PM, Gurjeet Singh singh.gurj...@gmail.com wrote:
Yes. I had the idea of trying to fix this by allowing the standby to
retain old versions of entire pages that got cleaned up on the master,
until the transactions that might want to read the old pages were
(2010/10/12 11:35), Robert Haas wrote:
On Mon, Oct 11, 2010 at 9:58 PM, KaiGai Koheikai...@ak.jp.nec.com wrote:
It seems to me the conclusion of this discussion is unclear.
We commonly try to find out an approach that minimize code complexity
to understand and maintain, so the point of issue
2010/10/12 Pavel Stehule pavel.steh...@gmail.com:
Hello
2010/10/11 Greg Stark gsst...@mit.edu:
On Sun, Oct 10, 2010 at 2:16 PM, Tom Lane t...@sss.pgh.pa.us wrote:
It was pointed out upthread that while median isn't presently
in the standard, Oracle defines it in terms of percentile_cont(0.5)
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