Welcome to WebmasterWorld Guest from 54.144.107.83

Forum Moderators: open

Message Too Old, No Replies

Large table still very slow

Tried everything to optimize

     
10:00 am on Apr 16, 2012 (gmt 0)

Junior Member

10+ Year Member

joined:May 7, 2005
posts: 143
votes: 0


Hello,

A week of work on and my sloq query log is still full.

Here's my table structure:

id int(10) UNSIGNED
product_id varchar(6)
num_people tinyint(2)
start_date date
duration tinyint(2)
old_price float(6,2)
new_price float(6,2)
unit_code varchar(4)
discount float(6,2)
area varchar(30)
zone varchar(25)
prod_name
prod_desc text
spec_code varchar(8)
name varchar(50)
features text
main_description text
dateAdded date
has_extras tinyint(1)

Current size: 588,000 Rows

Here's my indexes:

id A 588925 NULLNULLBTREE
start_date 1 start_date A 215 NULLNULLBTREE
duration 1 duration A 4 NULLNULLBTREE
unit_code 1 siteCode A 489 NULLNULLBTREE
num_people 1 sleeps A 9 NULLNULLBTREE
prod_name 1 siteName A 489 NULLNULLBTREE
has_extras 1 hasHotTub A 1 NULLNULLBTREE

This is a query that takes 40 seconds:

SELECT start_date,old_price,new_price,spec_code,num_people,duration,spec_code FROM hoseasons_cache
WHERE product_id = 'LP5454'
AND start_date BETWEEN '2012-05-01' AND '2012-05-31' AND duration IN ('3','4','7');

What should I do? Would smaller tables with JOIN be faster?

Any help is very much appreciated.
2:34 pm on Apr 16, 2012 (gmt 0)

Senior Member

WebmasterWorld Senior Member whoisgregg is a WebmasterWorld Top Contributor of All Time 10+ Year Member

joined:Dec 9, 2003
posts:3416
votes: 0


I don't see an index on `product_id` and that is the main field you seem to be searching on.
2:40 pm on Apr 16, 2012 (gmt 0)

Moderator from US 

WebmasterWorld Administrator lifeinasia is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month

joined:Dec 10, 2005
posts:5550
votes: 24


Major issue: you have no index on product_id
Minor issue: duration is a tinyint, but you're using single quotes around the values- change to "duration IN (3,4,7)"
Possible issue: if you aren't using those fields for searching in other queries, drop the indexes on unit_code, num_people, prod_name, and has_extras (Unneeded indexes probably won't make the SELECT query slower, but can drastically increase the DB size and slow INSERTs and UPDATEs.)
8:38 am on Apr 17, 2012 (gmt 0)

Junior Member

10+ Year Member

joined:May 7, 2005
posts: 143
votes: 0


How did I miss that one? Thank you - that's fixed it.
 

Join The Conversation

Moderators and Top Contributors

Hot Threads This Week

Featured Threads

Free SEO Tools

Hire Expert Members