On Tue, Nov 23, 2004 at 09:55:15PM +0100, [EMAIL PROTECTED] wrote:
> * Jesse Sheidlower
> [...]
> > CREATE TABLE `citation_subject` (
> > `id` int(11) NOT NULL auto_increment,
> > `citation_id` int(11) NOT NULL default '0',
> > `subject_id` int(11) NOT NULL default '0',
> > PRIMARY KEY (`i
* Jesse Sheidlower
[...]
> CREATE TABLE `citation_subject` (
> `id` int(11) NOT NULL auto_increment,
> `citation_id` int(11) NOT NULL default '0',
> `subject_id` int(11) NOT NULL default '0',
> PRIMARY KEY (`id`),
> KEY `citation_id` (`citation_id`,`subject_id`)
> )
Try adding an index
I have what I thought was a simple, well-indexed query, but it
turns out that it's acting as a pretty big drag. The one thing
that's clearly a problem (though I'm not sure of the extent of
the problem), I'm not sure how to fix.
There are three tables: citations, subjects, and a many-to-many
table
Hello Victor,
> What version of MySQL are you using? Have you
> checked the cardinality on
> these tables?
Problem solved! Optimizing the table brought the query
time down to 17 secs Wow!
Thanks for the input Victor and merci to Arnaud for
the quick fix.
Patrick
___
What version of MySQL are you using? Have you checked the cardinality on
these tables?
-Original Message-
From: Patrick Drouin
To: [EMAIL PROTECTED]
Sent: 7/15/04 8:27 AM
Subject: Need help optimizing query
Hello everyone,
I'm having a hard time with the following query. It
retr
Bonjour Arnaud,
--- Arnaud <[EMAIL PROTECTED]> wrote:
> On 15 Jul 2004 at 6:27, Patrick Drouin
> Your indexes look good, but I see that you have some
> varchar fields.
> Maybe
> you could run an "optimize table" on these tables?
I'm running it at the moment, I will follow-up on the
list when it'
On 15 Jul 2004 at 6:27, Patrick Drouin <[EMAIL PROTECTED]>
wrote:
> I'm having a hard time with the following query. It
> retrieves about 3K rows from a few tables. One of them
> contains over 40M rows. When run on a 3Ghz server with
> 1G of RAM it returns the rows in more than 1 mini. I
> don't
Hello everyone,
I'm having a hard time with the following query. It
retrieves about 3K rows from a few tables. One of them
contains over 40M rows. When run on a 3Ghz server with
1G of RAM it returns the rows in more than 1 mini. I
don't think that's normal.
Here's the output of EXPLAIN:
mysql>
Absolutely! I have multiple indexes. I think it might be a problem with ODBC
> Are your tables indexed? http://www.mysql.com/doc/en/MySQL_indexes.html
>
> Saqib Ali
> -
> http://www.xml-dev.com
>
>
-
Visit CARMEL MUSIC & ENTERTAINMENT we
Are your tables indexed? http://www.mysql.com/doc/en/MySQL_indexes.html
Saqib Ali
-
http://www.xml-dev.com
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2 PM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: RE: Need help optimizing query, awfully slow on only
> 2 records
>
>
> When following query is pulled up, it takes about whole 1-2
> minutes to come up. "inquiries" table has 17000 records,
> &
ilto:[EMAIL PROTECTED]
> Sent: Wednesday, August 20, 2003 3:14 PM
> To: Michael S. Fischer
> Cc: [EMAIL PROTECTED]
> Subject: RE: Need help optimizing query, awfully slow on only
> 2 records
>
>
>
> Result of EXPLAIN is:
> table|type|possible_keys|key|key_len|ref|ro
; > Sent: Wednesday, August 20, 2003 3:14 PM
> > To: Michael S. Fischer
> > Cc: [EMAIL PROTECTED]
> > Subject: RE: Need help optimizing query, awfully slow on only
> > 2 records
> >
> >
> >
> > Result of EXPLAIN is:
> > table|type|poss
Query takes 3.4 seconds to run on the server, but it takes 1-2minutes to run via
MyODBC 3.51.06 using passthrough (Access97 is the front end, but it has query
type that allows bypass of Access interpretation.
> Two Questions:
>
> Is the same query running directly on the linux server thru mysql i
ment) [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, August 20, 2003 2:52 PM
> > To: [EMAIL PROTECTED]
> > Cc: [EMAIL PROTECTED]
> > Subject: RE: Need help optimizing query, awfully slow on only
> > 2 records
> >
> >
> > When following query is pull
gt; > Sent: 19 August 2003 17:29
> > To: [EMAIL PROTECTED]
> > Subject: Need help optimizing query, awfully slow on only
> > 2 records
> >
> >
> > 1.2Ghz Pentium, with 1/2Gig of ram, 4.0.14MySQL, RedHat9.0
> >
> > I have about 20K records that res
IL PROTECTED]
> Subject: Need help optimizing query, awfully slow on only
> 2 records
>
>
> 1.2Ghz Pentium, with 1/2Gig of ram, 4.0.14MySQL, RedHat9.0
>
> I have about 20K records that result from the following
> query. Front end for the
> database is ACCESS97 and pulling up
Two Questions:
Is the same query running directly on the linux server thru mysql is also very slow ?
Have you done a explain plan on the query ?
Marc.
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1.2Ghz Pentium, with 1/2Gig of ram, 4.0.14MySQL, RedHat9.0
I have about 20K records that result from the following query. Front end for the
database is ACCESS97 and pulling up 20K records makes a huge performance hit.
For the form in question I am using PASSTHROUGH type query (the one that just
pa
Greetings, I am struggling trying to get good performance
using indexes.
I'll spare the details and narrow down the situation. I have about
100,000 rows of data with the following fields:
title - vachar(64)
description - text
state - varchar(2)
priority - int
modified - date
People type in
I need help optimizing the query below. I've included the query, the
table declerations, and the output of explain. Any help would be greatly
appreciated.
What I'd really like is to find out how to get it to use a key on the
lineitems table. I've tried adding indexes on the OrderID and MerchantID
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