At 02:49 PM 9/3/2008, Jim Leavitt wrote:
Hi Mike,
Yes sometimes, the application is an online book selection tool with
about 1 million titles in it. Now the queries which return 100,000 rows
would be something like returning all titles from a given publisher. Most
of the common searches
It's highly unlikely hardware upgrades are needed unless you're on a really
underpowered machine. How similar are the queries on the other machines?
The limit clause won't reduce the time taken to do the join and grouping,
it will only reduce the amount of output.
Also, I assumeyou have indexes
-Original Message-
From: Brent Baisley [mailto:[EMAIL PROTECTED]
Sent: Wednesday, September 03, 2008 5:35 PM
To: Jim Leavitt
Cc: mysql@lists.mysql.com
Subject: Re: Large Query Question.
That's a lot of data to return, make sure you factor in data load and
transfer time. You may try
Jim,
I've re-posted your message to the list so others can join in the
fray. :)
Mike
At 10:50 AM 9/4/2008, you wrote:
Hi Mike,
I do believe we have done the indexing properly. Please advise if we can
make any adjustments. Here is the output from the explain statements;
16634be.png
On Thu, Sep 4, 2008 at 10:38 AM, mos [EMAIL PROTECTED] wrote
Jim,
The problem is likely your index is not defined properly. Use an Explain
in front of the query to see if it can use just one index from each table.
I would try building a compound index on
Products: (RecordReference, FeedId)
Jim,
Retrieving 100,000 rows will always take some time. Do you really
need to return that many rows? Are you selecting just the columns you need?
What are the slow queries?
Mike
At 12:05 PM 9/3/2008, Jim Leavitt wrote:
Greetings List,
We have a medium-large size database application
What are the queries? Are they straight forward selects or joins? Are the
columns you select from indexed and are the indexes up-to-date?
On Wed, Sep 3, 2008 at 12:05 PM, Jim Leavitt [EMAIL PROTECTED] wrote:
Greetings List,
We have a medium-large size database application which we are
That's a lot of data to return, make sure you factor in data load and
transfer time. You may try breaking your query into smaller parts and
recombining the results in a scripting language. If you are searching
on a range (i.e. date range), break the range into smaller parts and
run multiple
@lists.mysql.com
Subject: Re: Large Query Question.
That's a lot of data to return, make sure you factor in data load and
transfer time. You may try breaking your query into smaller parts and
recombining the results in a scripting language. If you are searching
on a range (i.e. date range), break
On Wed, Sep 3, 2008 at 1:05 PM, Jim Leavitt [EMAIL PROTECTED] wrote:
We are having trouble with certain queries which are returning anywhere
from 10 - 30 rows. Total query time is taking approx 1 - 2 mins
depending on load. Is there anything in our conf file which could improve
our
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