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Re: Dimensional model, user ids and number of tables
Posted by: Mads Jensen
Date: June 26, 2009 07:17AM

Thank you for your answer.

I might have explained the number of rows wrong. 10k-100k was the number of rows each user would have in the database. Each query would target anything from 5-50 rows for each request.

My concern is due to having to place a user id with each row. So not only would i have to join on the surrogate keys, but also be required to have a " && user_id='11'" in each query to make sure requests are not made on rows that don't belong to the particular user.

From what i read about how InnoDB works, it's recommended to have the surrogate key as the first cell in the dimensions to get the best performance.



Edited 2 time(s). Last edit at 06/26/2009 07:19AM by Mads Jensen.

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