Question

I am developing a PHP application that deals with a large MySQL database and now I am starting to go over my memory limit (64mb) in PHP because of the database queries. I was wondering what the best way is to prevent (and if not, stop) memory exhaustion in PHP and MySQL?

Answer 1

I was able to compress the code into one SQL query so it just uses MySQL to get the numbers instead of PHP + MySQL:

SELECT COUNT(*) AS 'total', COUNT(DISTINCT u.UniqueUserId) AS 'unique', ((COUNT(*) / (
SELECT COUNT(*) FROM `Sessions` WHERE ApplicationId = '[appid]' AND StartApp BETWEEN '[start]' AND '[end]')) * 100) AS 'percent', u.LangID 
FROM `Sessions` AS s, `UniqueUsers` AS u
WHERE s.UniqueUserId = u.UniqueUserId AND s.ApplicationId = '[appid]' AND s.StartApp BETWEEN '[start]' AND '[end]'
GROUP BY u.LangID

Thanks!