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Speed up the product search


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I am logging slow queries and one shows up consistently slow. I can't find the code that is doing it, but it's when customers look at the products of a category. My site is very slow if there are more than about 10 people on it, and I think if I speed up the query, it will be much faster. Can anyone help me speed this up?


I am getting this result in my log file:


# Query_time: 16 Lock_time: 0 Rows_sent: 10 Rows_examined: 19096


This is the line that is taking so long:


select distinct p.products_id, pd.products_name from products p, products_description pd, products_to_categories p2c, categories c where p.products_status = '1' and p.products_ordered > 0 and p.products_id = pd.products_id and pd.language_id = '1' and p.products_id = p2c.products_id and p2c.categories_id = c.categories_id and '29000' in (c.categories_id, c.parent_id) order by p.products_ordered desc, pd.products_name limit 10;


My site is http://www.scrapbookersparadise.com/catalog/

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