The first thing you need to do is assess where your bottleneck is
going to be. Is it RAM? or CPU or IO? If your system is IO bound,
you are better off spending your $s on a good IO controller and lots
of drives that racking up the $$s with Expensive Opteron 275s or 250s,
when a 242 would do the
Be warned that if you use python, expect it to be slow. Many basic
associative array operations are more than 10x slower than C++'s
comparative operations leading to long page execution time if you are
dealing with alot of data. I have written a simple web framework in
Python and XML, and it's a
Linux 2.6 does have NUMA support. But whether it's actually a for
Postgres is debatable due to the architecture.
First let's take a look at how NUMA makes this run faster in a 2x
Opteron system. The idea is that the processes running on CPU0 can
access memory attached to that CPU a lot faster
On Sun, Apr 24, 2005 at 10:05:53PM -0600,
Michael Fuhr [EMAIL PROTECTED] wrote
a message of 85 lines which said:
This wouldn't solve all your problems, but you could write a generic
trigger function in a language like PL/Tcl or PL/Python (or PL/Perl
in 8.0 and later) and pass the column
do savepoints automatically be
released on commit by postgres?
thanks
robert
helo,
I have this code:
ResultSet rs = stmt.executeQuery(SELECT attr FROM table WHERE id=1);
System.out.println(rs.getFetchSize());
rs.getFetchSize() everytime returns 0... why???
thanx, miso
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TIP 9: the planner will
Hi list,
some time ago, there was a discussion about oid wraparound. See
http://archives.postgresql.org/pgsql-general/2002-10/msg00561.php .
Those days, we had PostgreSQL 7.1 and 7.2, and we had to be careful
oids approaching 2^32 (2.14 billion)
Now, we have 8.0. What does the situation look
Is there a way to convert in interval into hours? I have a table that
records the amount of time worked by a person and want to sum up all the
hours, however with the column being an interval once you reach more
than 24 hours it turns that into a day. This is not what I want so
instead of
On Apr 26, 2005, at 18:47, Jake Stride wrote:
Is there a way to convert in interval into hours? I have a table that
records the amount of time worked by a person and want to sum up all
the
hours, however with the column being an interval once you reach more
than 24 hours it turns that into a day.
On 4/26/05, Jake Stride [EMAIL PROTECTED] wrote:
Is there a way to convert in interval into hours? I have a table that
records the amount of time worked by a person and want to sum up all the
hours, however with the column being an interval once you reach more
than 24 hours it turns that into
I had the same problem and wrote a small function
create function hours(timestamp without time zone, timestamp without
time zone) RETURNS integer as
$$select cast( (cast($2 as date) - cast($1 as date)) * 24 + extract(hour
from cast($2 as time) - cast($1 as time)) as integer)$$ language SQL
On Tue, 26 Apr 2005 07:24 pm, Hubert Fröhlich wrote:
Hi list,
some time ago, there was a discussion about oid wraparound. See
http://archives.postgresql.org/pgsql-general/2002-10/msg00561.php .
Those days, we had PostgreSQL 7.1 and 7.2, and we had to be careful
oids approaching 2^32
Hubert Fröhlich wrote:
Those days, we had PostgreSQL 7.1 and 7.2, and we had to be careful oids
approaching 2^32 (2.14 billion)
Now, we have 8.0. What does the situation look like?
With the default settings, there is exactly the same risk of OID
wraparound as in earlier releases. However, you
On Tue, 2005-04-26 at 01:32 -0700, William Yu wrote:
Linux 2.6 does have NUMA support. But whether it's actually a for
Postgres is debatable due to the architecture.
First let's take a look at how NUMA makes this run faster in a 2x
Opteron system. The idea is that the processes running on
On Apr 25, 2005, at 10:54 PM, [EMAIL PROTECTED] wrote:
I just now tried creating a second server with pgadminIII. I am
confused as to why one would have more than one server. There does
not seem to be any way to switch from one server to another, or to
log into one particular server (and
On Tue, Apr 26, 2005 at 10:52:34AM +0200, Thaler Robert wrote:
do savepoints automatically be released on commit by postgres?
Yes. Savepoints do not cross transaction boundaries.
--
Alvaro Herrera ([EMAIL PROTECTED])
Some men are heterosexual, and some are bisexual, and some
men don't think
On Tue, 26 Apr 2005, Joe Healy wrote:
I have found using python with reportlab
(http://www.reportlab.org/rl_toolkit.html) very easy to create pdf reports
based on queries.
Joe,
Thank you very much. I'll look at it. Yesterday I discovered another report
writer (uses python) called papryrus that
For portability's sake commit successful transactions and rollback those
that fail.
Rick
[EMAIL PROTECTED] wrote on 04/25/2005 05:53:11 PM:
Dann Corbit [EMAIL PROTECTED] writes:
Probably, turning fsync off would be helpful, since you know it is
read-only.
Wouldn't make any difference: a
Hi for all , plese a question ,this function can be write in pl/pgsql ???
thank for all
2005/4/24, Stephane Bortzmeyer [EMAIL PROTECTED]:
To protect the database from programming errors (there is a team
working on the project and some beginners may produce bugs), I would
like to flag
On Tue, Apr 26, 2005 at 09:49:05AM -0400,
Mario Soto Cordones [EMAIL PROTECTED] wrote
a message of 45 lines which said:
Hi for all , plese a question ,this function can be write in pl/pgsql
???
I do not understand, it IS pl/pgsql.
CREATE OR REPLACE FUNCTION check_immutable()
Mike Mascari mascarm@mascari.com wrote on 04/25/2005 09:21:02 PM:
[EMAIL PROTECTED] wrote:
In my *utter* lack of enthusiasm over this option, I was gathering
ammunition for better hardware. I went to spec.org for speed
comparisons,
and sun.com for price comparisons. Sun's *entry* level
On Tue, 26 Apr 2005, Mario Soto Cordones wrote:
Hi for all , plese a question ,this function can be write in pl/pgsql
???
No, there is no possibility write it in pl/pgsql.
Pavel Stehule
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TIP 9: the planner
On Tue, 26 Apr 2005, Mario Soto Cordones wrote:
Hi for all , plese a question ,this function can be write in pl/pgsql
???
I am sorry. Universal handler for immutable attributes is not possible in
plpgsql. Only if you know names of immutable columns, than you can use
plpgsql. You
Bruno Wolff III [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Please keep replies copied to the list so that other people can learn from
and comment on the discussion unless to have a good reason to make the
thread private.
On Mon, Apr 25, 2005 at 21:46:20 +0200,
Zlatko Matic
On Apr 26, 2005, at 12:13 AM, Dinesh Pandey wrote:
From where can I download latest Postgres source (tar file) for Fedora
Core OS?
http://www.postgresql.org/ftp/v8.0.2/
John DeSoi, Ph.D.
http://pgedit.com/
Power Tools for PostgreSQL
---(end of
Hi,
I'm trying to
execute COPY command from some pgsql function.
The filename is
given as an argument of the function.
But I get the
filename like 'F:\tmp\file.txt' and I need to change this to 'F:/tmp/file.txt'
before applying the COPY command.
I dind't succeed to
replace '\' by '/' in
--- [EMAIL PROTECTED] wrote:
Hi,
I'm trying to execute COPY command from some pgsql
function.
The filename is given as an argument of the
function.
But I get the filename like 'F:\tmp\file.txt' and I
need to change this to
'F:/tmp/file.txt' before applying the COPY command.
I
Hello,
I have a problem when i try to execute my request :
ERROR: out of memory
DETAIL: Failed on request of size 336.
(I had execute the " VACCUM" before)
It's a SELECT
which contains several
jointures (simple ones, 1-1).
With 5
jointures there is no problem but with 6, i have this
On Sat, 23 Apr 2005, Uwe C. Schroeder wrote:
Well, you overlook one thing there. SUN has always has a really good I/O
performance - something far from negligible for a database application.
A lot of the PC systems lack that kind of I/O thruput.
Just compare a simple P4 with ATAPI drives to
On Tue, 2005-04-26 at 09:43 +0530, Dinesh Pandey wrote:
From where can I download latest Postgres source (tar file) for Fedora
Core OS?
Regards
Dinesh Pandey
This is a question for Fedora mailing-lists. Anyway, FC distributes
sources in RPM format. Assuming you're referring to the latest
Hello List,
A question about index. It mentioned in postgresql 8.0 doc a query or
data manipulation command can use *at most one index* *per table*. An
example query is:
select * from A left join B using (id) where A.type='apple' and
A.isExport=true;
id is the primary key for both table A B.
That is helpful, I have created a slightly different function that
returns an interval in the format HH:MM not sure if it will help anyone
or anyone has any suggestions to improve it:
create function hours(interval) returns varchar as 'SELECT
floor(extract(epoch from $1)/3600) || \':\' ||
On Tue, 2005-04-26 at 13:58 -0400, Ying Lu wrote:
select * from A left join B using (id) where A.type='apple' and
A.isExport=true;
id is the primary key for both table A B. If index (type, isExport)
has been created for table A. In the above query, will this index works?
simplest is
On Tue, Apr 26, 2005 at 01:58:09PM -0400, Ying Lu wrote:
A question about index. It mentioned in postgresql 8.0 doc a query or
data manipulation command can use *at most one index* *per table*. An
example query is:
select * from A left join B using (id) where A.type='apple' and
[EMAIL PROTECTED] wrote on 04/25/2005 09:19:57 PM:
On Sat, 23 Apr 2005, Uwe C. Schroeder wrote:
Well, you overlook one thing there. SUN has always has a really good
I/O
performance - something far from negligible for a database application.
A lot of the PC systems lack that kind of
Sun's stock was at $65.00 in late 2000 and has rocketed to $3.50. I think
somebody else besides us noticed too.
[EMAIL PROTECTED] wrote on 04/26/2005 01:12:49 PM:
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Brent Wood
Sent: Monday, April 25,
If you want a unique key across several tables, can you not do something
like:
CREATE SEQUENCE detail_seq INCREMENT BY 1;
CREATE TABLE table1 (
table1_id INTEGER PRIMARY KEY DEFAULT nextval('detail_seq'),
item1_name VARCHAR(100) NOT NULL
);
CREATE TABLE table2 (
Hello, people.
I´m looking for a FREE tool where you can VISUALLY link tables and
mark fields and the tool
generates the query automatically.
I´ve tried PGExplorer. It´s nice, but it doens´t create JOINS, just
a lot of WHERE... =...AND...=...AND...
Do you people have any tips ??
Thanks in
Does anyone know if it's possible to build plruby for the native version of
PostgreSQL 8? If so, can you please let me know where you obtained the
sourcecode, and build instructions, if any?
Thanks,
Steve
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TIP 2: you can
If I define a primary key:
name TEXT NOT NULL,
address INET,
PRIMARY KEY(name, address)
the definition (seen by \d) becomes:
name | text| not null
address | inet| not null
address is now not null, which I do
Stephane Bortzmeyer wrote:
If I define a primary key:
name TEXT NOT NULL,
address INET,
PRIMARY KEY(name, address)
the definition (seen by \d) becomes:
name | text| not null
address | inet| not null
Richly deserved IMNSHO. my current employer was bilked for many many months
for a piece of crap E10K that barely outperforms a couple of AMD chips. But
at many, many times the price. We finally upgraded/migrated to AIX/g5 chips
and run what was run on 20 cpus on 2.
If Sun pulls out of its slow
I would like to use P* to store files. These files will probably
range from 500K to 2 MB in size and there will be thousands upon
thousands of them. I was wondering how P* stores blobs, if it is all
in one file, or if each blob is sored in it's own file. The reason
being, I know that windows
On Tue, Apr 26, 2005 at 03:22:40PM -0500,
Guy Rouillier [EMAIL PROTECTED] wrote
a message of 37 lines which said:
The primary key constraint specifies that a column or columns of a
table may contain only unique (non-duplicate), nonnull values.
Technically, PRIMARY KEY is merely a
On Tue, 2005-04-26 at 15:30, Travis Harris wrote:
I would like to use P* to store files. These files will probably
range from 500K to 2 MB in size and there will be thousands upon
thousands of them. I was wondering how P* stores blobs, if it is all
in one file, or if each blob is sored in
Travis Harris wrote:
I would like to use P* to store files. These files will probably
range from 500K to 2 MB in size and there will be thousands upon
thousands of them. I was wondering how P* stores blobs,
Either as bytea or a large object.
if it is all
in one file, or if each blob is sored in
Maybe that's why used Sun E10ks with 12 CPUs and 12 gig of ram are going
for $5995 AND still not selling on ebay...
On Tue, 2005-04-26 at 15:27, Mohan, Ross wrote:
Richly deserved IMNSHO. my current employer was bilked for many many months
for a piece of crap E10K that barely outperforms a
On Tue, 26 Apr 2005, Travis Harris wrote:
I would like to use P* to store files. These files will probably range
from 500K to 2 MB in size and there will be thousands upon thousands of
them. I was wondering how P* stores blobs, if it is all in one file, or if
each blob is sored in it's own file.
bilked is my new favorite word.
On Tue, 26 Apr 2005, Mohan, Ross wrote:
Richly deserved IMNSHO. my current employer was bilked for many many months
for a piece of crap E10K that barely outperforms a couple of AMD chips. But
at many, many times the price. We finally upgraded/migrated to AIX/g5
On Tue, 2005-04-26 at 15:39, Stephane Bortzmeyer wrote:
On Tue, Apr 26, 2005 at 03:22:40PM -0500,
Guy Rouillier [EMAIL PROTECTED] wrote
a message of 37 lines which said:
The primary key constraint specifies that a column or columns of a
table may contain only unique (non-duplicate),
Hi all,
I'll really appreciate any help to reduce the disk usage of
postgresql. I have a web site witch is data are refreshed each night.
Right now the disk usage is about 400 Megs but since I reload data all
nights it getting huge.
I do vacuum each time I am finished loading data.
I look
On Tue, 2005-04-26 at 13:05 -0700, Steve - DND wrote:
Does anyone know if it's possible to build plruby for the native version of
PostgreSQL 8? If so, can you please let me know where you obtained the
sourcecode, and build instructions, if any?
Tried also to build it, but no luck. You may use
I have a query which didn't work properly until I fully qualified
columns used in a a subquery with the appropriate table names. The
reason is that both tables have a column named 'chromosome' used in the
subquery. In the following query, PG treats the phrase and chromosome
= chromosome as
On Tue, Apr 26, 2005 at 03:41:28PM -0500, Scott Marlowe wrote:
On Tue, 2005-04-26 at 15:30, Travis Harris wrote:
I would like to use P* to store files. These files will probably
range from 500K to 2 MB in size and there will be thousands upon
thousands of them. I was wondering how P*
On Tue, 2005-04-26 at 16:42, Alvaro Herrera wrote:
On Tue, Apr 26, 2005 at 03:41:28PM -0500, Scott Marlowe wrote:
On Tue, 2005-04-26 at 15:30, Travis Harris wrote:
I would like to use P* to store files. These files will probably
range from 500K to 2 MB in size and there will be thousands
Hello, all. I work for a Manhattan ISP and have developed an internal
systems management/housekeeping app on php/postgres 7.4. I am trying to
speed up some bits with stored procedures and have had great success,
except I've now run into a bit of trouble. It comes down to this:
# SELECT *
Alvaro Herrera [EMAIL PROTECTED] writes:
On Tue, Apr 26, 2005 at 03:41:28PM -0500, Scott Marlowe wrote:
If you store them as large objects, they will each get their own file.
Huh, no, they won't. They will be stored in the pg_largeobject table.
It's been quite a while since they are not
I just downloaded the windows demo for Rekall, which is an MSAccess like
product (loosely speaking) with native drivers for postgresql and some other
engines (plus odbc for yet others). I was a bit confused on certain things
so I emailed my questions, and the president of the company
Without anything truly fancy, you could write a proc which dynamically
builds a query string using the IN form out of a array parameter:
You get to do a bunch of string contatenation and you don't get the
luxury of pre-planning, but this technique might work for you. If your
arrays aren't too
Ok, I have added per query basis weight control to my TODO list.
--
Tatsuo Ishii
Thanks.
Is it on your todo list to something like this...? It is the opposite
of /* NO LOAD BALANCE */.
Make a /* SLAVE */ type comment to force it to a slave? It would be
helpful in forcing a
Kevin Murphy [EMAIL PROTECTED] writes:
... In the following query, PG treats the phrase and chromosome
= chromosome as and genetic.chromosome = genetic.chromosome.
And that surprises you why?
regards, tom lane
---(end of
Bart Grantham [EMAIL PROTECTED] writes:
It comes down to this:
# SELECT * FROM connections WHERE connectee_node_id = ANY (
ARRAY[28543,28542] );
[ performance sucks ]
Yeah :-(. The = ANY (array) notation is new in the last release or so,
and is completely without optimization of any kind.
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