Chris Faulkner [EMAIL PROTECTED] writes:
I am seeing this message in my logs.
bt_fixroot: not valid old root page
That's not good. I'd suggest reindexing that index.
regards, tom lane
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TIP 2: you
Hi,
I am trying to design a large text search database.
It will have upwards of 6 million documents, along with meta data on
each.
I am currently looking at tsearch2 to provide fast text searching and
also playing around with different hardware configurations.
1. With tsearch2 I get very good
Date: Sun, 12 Oct 2003 13:30:45 -0700
From: Josh Berkus [EMAIL PROTECTED]
To: Nick Barr [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: go for a script! / ex: PostgreSQL vs. MySQL
Message-ID: [EMAIL PROTECTED]
This would be parameters such as the block size and a few other
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 w.r.t. rounding, error handling,
And my third
Do you know of any RDBMS that actually will execute a single query on
multiple processors?
SQL Server does in a sense. It can split a query onto multiple threads
(which could possible use multiple processors) and then brings the results
from the threads into one and then sends the results to
Ivan,
There was some talk, either on this list or freebsd-performance about
setting the default block size for PostgreSQL running on FreeBSD to be 16k
because of performance reasons. That is: *default* for the port, user is
not asked. So an automagical method to scale non-default block sizes
Mat,
1. With tsearch2 I get very good query times up until I insert more
records. For example with 100,000 records tsearch2 returns in around 6
seconds, with 200,000 records tsearch2 returns in just under a minute.
Is this due to the indices fitting entirely in memory with 100,000
records?
On Tue, 14 Oct 2003, Tom Lane wrote:
scott.marlowe [EMAIL PROTECTED] writes:
open_sync was WAY faster at this than the other two methods.
Do you not have open_datasync? That's the preferred method if
available.
Nope, when I try to start postgresql with it set to that, I get this error
Josh Berkus [EMAIL PROTECTED] writes:
Unless there's a way to find it in the compiled source?
See pg_controldata.
regards, tom lane
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TIP 8: explain analyze is your friend
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Is there any way to determine how much of the free space map is currently in
use?(ie. where and what it is tracking?) I vacuum on a regular basis but I
never hold in terms of disk space usage. I jacked up the free space map
pages but this doesn't
This would be parameters such as the block size and a few
other compile time parameters. If we can get to some of these
read-only parameters than that would make this step easier,
certainly for the new recruits amongst us.
Actually, from my perspective, we shouldn't bother with
Jeremy M. Guthrie [EMAIL PROTECTED] writes:
Is there any way to determine how much of the free space map is currently i=
n=20
use?(ie. where and what it is tracking?) I vacuum on a regular basis but I=
=20
never hold in terms of disk space usage.
Not in 7.3 AFAIR. In 7.4 a full-database
On Mon, 2003-10-13 at 15:43, David Griffiths wrote:
Here are part of the contents of my sysctl.conf file (note that I've
played with values as low as 60 with no difference)
kernel.shmmax=14
kernel.shmall=14
This is only a system-wide limit -- it either allows the shared
On Tue, 14 Oct 2003, Wei Weng wrote:
On Sat, 11 Oct 2003, Christopher Kings-Lynne wrote:
I have two very similar queries which I need to execute. They both have
exactly the same from / where conditions. When I execute the first, it takes
about 16 seconds. The second is executed
Perhaps you are confusing it with the MySQL query cache?
Is there plan on developing one (query cache)?
For the most part, prepared queries and cursors give you a greater
advantage due to their versatility -- both of which we do have.
In the cases where an actual cache is useful, the client
Jeff,
I'm curious to what kind of testing you've done with LVM. I'm not
currently trying any backup/restore stuff, but I'm running our DBT-2
workload using LVM. I've started collecting vmstat, iostat, and
readprofile data, initially running disktest to gauge the performance.
For anyone
Marko Karppinen writes:
GCC sets __FAST_MATH__ even if you counter a -ffast-math with the
negating flags above. This means that it is not currently possible to
use the -fast flag when compiling PostgreSQL at all. Instead, you have
to go through all the flags Apple is setting and only pass on
On 8.10.2003, at 21:31, 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:
darwin
Regarding Darwin optimizations, Apple has introduced a
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