Hi.
You may want to try a combined index (RecordNumber, WordNumber) on
wordindex, because the indexes you have can only restrict on field
(RecordNumber in the EXPLAIN below) e.g.
ALTER TABLE wordindex ADD UNIQUE(RecordNumber, WordNumber);
I presume that the RecordNumber/WordNumber pairs are
Hello, I don't understand why my queries are so incredibly slow.
We have MySQL on a 800MHz Linux machine with 513Mb.
Most queries look like this:
SELECT B.* FROM maintable AS M, wordindex AS YL1,
wordindex AS YL2, wordindex AS YL3
WHERE
YL1.Word = 'billy' AND
YL1.RecordNumber =
Tim Samshuijzen [EMAIL PROTECTED] writes:
Anyone out there who wants to save me and our company?
You missed the important first step: EXPLAIN the query.
--
Dave Hodgkinson, http://www.hodgkinson.org
Editor-in-chief, The Highway Star
To: [EMAIL PROTECTED]
Sent: Tuesday, February 06, 2001 12:04 PM
Subject: amazingly slow
Hello, I don't understand why my queries are so incredibly slow.
We have MySQL on a 800MHz Linux machine with 513Mb.
Most queries look like this:
SELECT B.* FROM maintable AS M, wordin
the query is amazingly slow.
Tim
At 10:52 AM 6-2-2001 +, you wrote:
Tim Samshuijzen [EMAIL PROTECTED] writes:
Anyone out there who wants to save me and our company?
You missed the important first step: EXPLAIN the query.
--
Dave Hodgkinson, http
PROTECTED] writes:
This still does not tell me why the query is amazingly slow.
What else is happening on the system? what does, say, a vmstat 5 give?
--
Dave Hodgkinson, http://www.hodgkinson.org
Editor-in-chief, The Highway Star http://www.deep-purple.com
To: [EMAIL PROTECTED]
Subject: Re: amazingly slow
Dear Dave,
Thanks for your reply.
(The table actually works with word numbers, as the words
are present in a hash table. I explained it the way I did
because functionally it is the same. So the actual search
is for WordNumber values instead of Word
complete within short time.
can you send the output of DESCRIBE db.tablename of all used tables?
regards,
rene
- Original Message -
From: "Tim Samshuijzen" [EMAIL PROTECTED]
To: "Ren Tegel" [EMAIL PROTECTED]
Sent: Tuesday, February 06, 2001 3:07 PM
Subject: Re: amazin
their performance enhancement.
could that be true?
dan
-Original Message-
From: Tim Samshuijzen [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 6 February 2001 04:50
To: [EMAIL PROTECTED]
Subject: Re: amazingly slow
Dear Dave,
Thanks for your reply.
(The table actually works with word
Message-
From: Ren Tegel [SMTP:[EMAIL PROTECTED]]
Sent: 06 February 2001 14:35
To: Tim Samshuijzen; [EMAIL PROTECTED]
Subject: Re: amazingly slow
Tim,
Hmmm... so you are suggesting the format of the query might be the cause
of
this slow response. I find it hard to believe, unless
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