On Wed, 8 Oct 2003, Tom Lane wrote:
Andriy Tkachuk [EMAIL PROTECTED] writes:
At second. calc_total() is immutable function:
but it seems that it's not cached in one session:
It's not supposed to be.
but it's written id doc:
IMMUTABLE indicates that the function always
Hi guys,
I followed the discussion and here are my 0.2$:
I think instead of thinking about where to put the
information about tuning, someone should provide a
pgsql-autotune. Maybe even a shell script would do the
trick.
It's not so hard to find out, how much memory is installed,
and IMHO
On Wed, Oct 08, 2003 at 01:28:53PM -0400, Bruce Momjian wrote:
Agreed. Text added to install docs:
[c.]
I think this is just right. It tells a user where to find the info
needed, doesn't reproduce it all over the place, and still points out
that this is something you'd better do. Combined
On 09/10/2003 09:29 Oliver Scheit wrote:
Hi guys,
I followed the discussion and here are my 0.2$:
I think instead of thinking about where to put the
information about tuning, someone should provide a
pgsql-autotune. Maybe even a shell script would do the
trick.
It's not so hard to find out, how
http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html
Shridhar
---(end of broadcast)---
TIP 6: Have you searched our list archives?
http://archives.postgresql.org
The world rejoiced as [EMAIL PROTECTED] (Josh Berkus) wrote:
Chris,
Some time in the late '80s, probably '88 or '89, there was a paper
presented in Communications of the ACM that proposed using this sort
of hypernormalized schema as a way of having _really_ narrow schemas
that would be
On Wed, 8 Oct 2003, Neil Conway wrote:
Hey Jeff,
On Wed, 2003-10-08 at 11:46, Jeff wrote:
Yeah - like I expected it was able to generate much better code for
_bt_checkkeys which was the #1 function in gcc on both sun linux.
If you get a minute, would it be possible to compare the
Christopher Browne wrote:
Wow, that takes me back to a paper I have been looking for for
_years_.
Some time in the late '80s, probably '88 or '89, there was a paper
presented in Communications of the ACM that proposed using this sort
of hypernormalized schema as a way of having _really_ narrow
So you want -fast added as default for non-gcc Solaris? You mentioned
there is a warning generated that we have to deal with?
---
Jeff wrote:
On Wed, 8 Oct 2003, Neil Conway wrote:
Hey Jeff,
On Wed, 2003-10-08 at
On Thu, 9 Oct 2003, Bruce Momjian wrote:
So you want -fast added as default for non-gcc Solaris? You mentioned
there is a warning generated that we have to deal with?
Yeah, suncc generates a warning for _every_ file that says:
Warning: -xarch=native has been explicitly specified, or
Josh Berkus wrote:
Greg,
You lost me on that one. What's a vertical child table?
Currently, you store data like this:
id address uptime speed memory tty
3 67.92 0.3 11.237 6
7 69.51.1 NULL15
What is the performance win for the -fast flag again?
---
Jeff wrote:
On Thu, 9 Oct 2003, Bruce Momjian wrote:
So you want -fast added as default for non-gcc Solaris? You mentioned
there is a warning generated
On Thu, 9 Oct 2003, Shridhar Daithankar wrote:
Kaarel wrote:
http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html
Shridhar
I feel incompetent when it comes to file systems. Yet everybody would like to
have the best file system if given the choice...so do I :) Here I am
On Thu, 9 Oct 2003, Bruce Momjian wrote:
52 seconds to 19-20 seconds
Wow, that's dramatic. Do you want to propose some flags for non-gcc
Solaris? Is -fast the only one? Is there one that suppresses those
warnings or are they OK?
Well. As I said, I didn't see an obvious way to hide
On Thu, 9 Oct 2003, Kenneth Marshall wrote:
Jeff,
My first concern with the -fast option is that it makes an executable
that is specific for the platform on which the compilation is run
unless other flags are given. My second concern is the effect it has
on IEEE floating point behavior
On Thu, Oct 09, 2003 at 01:04:23PM -0400, Jeff wrote:
So you think we should leave PG alone and let it run horrifically slowly?
Do you have a better idea of how to do this?
Given the point in the release cycle, mightn't the FAQ_Solaris or
some other place be better for this for now? I agree
Yeah, I had similar thought to Oliver's and suspected that this would be
the answer.
Also, while it's not too hard to do this for a single platform, it gets
complecated once you start looking at different ones.
Josh, let me know when you're ready to do this. I'll try to help,
although my perl's
This is a timely thread for myself, as I'm in the
middle of testing both databases as an Oracle replacement.
As of this moment, I know more about MySQL (tuning,
setup, features) than I do about Postgres. Not because I like MySQL more, but
because
1)the MySQL docs are better (sorry - I
Josh Berkus kirjutas N, 09.10.2003 kell 08:36:
Chris,
The need to do a lot of joins would likely hurt performance somewhat,
as well as the way that it greatly increases the number of rows.
Although you could always split it into several tables, one for each
value_type, and UNION them
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Andrew Sullivan wrote:
On Thu, Oct 09, 2003 at 01:04:23PM -0400, Jeff wrote:
So you think we should leave PG alone and let it run horrifically slowly?
Do you have a better idea of how to do this?
Given the point in the release cycle, mightn't the FAQ_Solaris or
some other place be
On Thu, 9 Oct 2003, David Griffiths wrote:
1) the MySQL docs are better (sorry - I found them easier to read, and
more comprehensive; I had an easier time finding the answers I needed)
Huh. I had the opposite experience. Each to his own.
I think everybody agrees PG needs a better tuning doc
Jeff wrote:
We're keeping the -O2 for gcc in the template and moving the mention of
-fast to the FAQ, correct?
gcc gets -O2, non-gcc gets -O, and -fast is in the FAQ, yea.
--
Bruce Momjian| http://candle.pha.pa.us
[EMAIL PROTECTED] | (610) 359-1001
I am very interested in the non-Cygwin windows port. Looking over the 7.4
beta release, it looks like the code made it in. I read through the win32
related docs, to find out that they are out-of date instructions (11/2002).
I do hope these get updated with the native windows stuff.
But I came
Nick,
Josh- It would be great to have a link to those last two excellent resources
from the techdocs area- perhaps from the optimizing section in
http://techdocs.postgresql.org/oresources.php. Who should we suggest this
to? (I submitted these using the form in that area, but you may have
Boy, I must be getting annoying by now huh?
Anyway, after the joys of Solaris being fast I'm moving onto another area
- backup restore. I've been checking the archives and haven't seen any
good tips for backing up big databases (and more importantly,
restoring).
I've noticed while doing a
On Thu, 9 Oct 2003, Jeff wrote:
On Thu, 9 Oct 2003, David Griffiths wrote:
1) the MySQL docs are better (sorry - I found them easier to read, and
more comprehensive; I had an easier time finding the answers I needed)
Huh. I had the opposite experience. Each to his own.
I think
Scott,
any chance of getting the perf.html file from varlena folded into the main
documentation tree somewhere? it's a great document, and it would
definitely help if the tuning section of the main docs said For a more
thorough examination of postgresql tuning see this: and pointed to it.
Dror Matalon [EMAIL PROTECTED] writes:
Actually what finally sovled the problem is repeating the
dtstamp last_viewed
in the sub select
That will at least convince the optimizer to use an index range lookup. But it
still will have to scan every record that matches channel==$1, link==$2, and
Jeff [EMAIL PROTECTED] writes:
Idea #1:
Use an LVM and take a snapshop - archive that.
From the way I see it. the downside is the LVM will use a lot of space
until the snapshot is removed. Also PG may be in a slightly inconsistant
state - but this should appear to PG the same as if the
How did this drive come by default? Write-cache disabled?
---
scott.marlowe wrote:
On Thu, 2 Oct 2003, scott.marlowe wrote:
I was testing to get some idea of how to speed up the speed of pgbench
with IDE drives and
On Thu, Oct 09, 2003 at 07:07:00PM -0400, Greg Stark wrote:
Dror Matalon [EMAIL PROTECTED] writes:
Actually what finally sovled the problem is repeating the
dtstamp last_viewed
in the sub select
That will at least convince the optimizer to use an index range lookup. But it
still
On Thu, Oct 09, 2003 at 17:44:46 -0700,
Dror Matalon [EMAIL PROTECTED] wrote:
How is doing order by limit 1 faster than doing max()? Seems like the
optimizer will need to sort or scan the data set either way. That part
didn't actually make a difference in my specific case.
max() will never
On Thu, 9 Oct 2003, David Griffiths wrote:
PostgreSQL supports constraints. MySQL doesn't; programmers need to
take care of that from the client side
Again, InnoDB supports constraints.
Really? This is news. We did some tests on constraints on InnoDB, and
found that while they
Dror Matalon [EMAIL PROTECTED] writes:
Ouch. I just double checked and you're right. Is this considered a bug,
or just an implementation issue?
Call it a wishlist bug. The problem is it would be a hard feature to implement
properly. And none of the people paid to work on postgres by various
Say, what do people think about a comment board thing like php.net has
attached to the documentation. People can add comments that show up directly
on the bottom of the documentation for each function. I find it's mostly full
of junk but skimming the comments often turns up one or two relevant
On Wed, Oct 08, 2003 at 02:31:29PM -0400, Bruce Momjian wrote:
Well, this is really embarassing. I can't imagine why we would not set
at least -O on all platforms. Looking at the template files, I see
these have no optimization set:
I think gcc _used_ to generate bad code on SPARC if you set
On Wed, 2003-10-08 at 21:44, Bruce Momjian wrote:
Agreed. Do we set them all to -O2, then remove it from the ones we
don't get successful reports on?
I took the time to compile CVS tip with a few different machines from
HP's TestDrive program, to see if there were any regressions using the
new
Isn't it great how you have the same directory on every host so you can
download once and run the same tests easily.
Neil Conway wrote:
$ uname -a
Linux spe170 2.4.17-64 #1 Sat Mar 16 17:31:44 MST 2002 parisc64 unknown
$ gcc --version
3.0.4
'make check' passes
I didn't know there was a
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