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Re: Large Query Question.

From: mos (mos99fastmail.fm)
Date: Wed Sep 03 2008 - 14:02:26 CDT


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 which we are trying
>to optimize and I have a few questions.
>
>Server Specs
>1 Dual Core 2.6 Ghz
>2GB Ram
>
>Database Specs
>51 Tables
>Min 100000 rows, Max 1000000 rows
>Total size approx 2GB
>
>My.cnf
>[mysqld]
>set-variable=local-infile=0
>log-slow-queries=slow-queries.log
>datadir=/var/lib/mysql
>socket=/var/lib/mysql/mysql.sock
>old_passwords=1
>key_buffer = 512M
>max_allowed_packet=4M
>sort_buffer_size = 512M
>read_buffer_size = 512M
>read_rnd_buffer_size = 256M
>record_buffer = 256M
>myisam_sort_buffer_size = 512M
>thread_cache = 128
>query_cache_limit = 1M
>query_cache_type = 1
>query_cache_size = 32M
>join_buffer = 512M
>table_cache = 512
>
>
>We are having trouble with certain queries which are returning
>anywhere from 100000 - 300000 rows. Total query time is taking approx
>1 - 2 mins depending on load. Is there anything in our conf file
>which could improve our performance? Are there any hardware
>recommendations that could help us improve the speed? Would more
>memory help us? Any comments or recommendations are greatly
>appreciated.
>
>Thanks much.
>
>
>Jim Leavitt
>Developer
>Treefrog Interactive Inc. (www.treefrog.ca)
>"Bringing the Internet to Life"
>
>
>
>
>

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