I’ve already wrote a few times about various projects using Sphinx with MySQL for scalable Full Text Search applications. For example on BoardReader we’re using this combination to build search against over 1 billion of forum posts totaling over 1.5TB of data handling hundreds of thousands of search queries per day. The count of forum [...]
Implementing efficient counters with MySQL
July 1, 2007 By 16 Comments
On many web sites you would see a counter how many time given object – blog post, forum thread, image, movie etc was viewed. This is sometimes handy feature but it can be rather expensive from performance point of view. The nasty thing with counters as they are implemented the most trivial way – they [...]
Life Beyond MySQL
September 27, 2006 By 3 Comments
When I was leaving MySQL I wrote I will be doing some Web projects on my own, besides doing MySQL Consulting. I think some people thought I am just using that as an excuse and really I will only do consulting. So I’m pretty happy to announce my first project. NNSEEK Is NewsGroup search engine, [...]
Why Index could refuse to work ?
September 8, 2006 By 15 Comments
Have you ever seen index which refused to be used even if there is every reason for it to work (from the glance view):
1 2 3 4 5 6 7 | mysql> explain select * from article where article_id=10; +----+-------------+---------+------+---------------+------+---------+------+-------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+---------+------+---------------+------+---------+------+-------+-------------+ | 1 | SIMPLE | article | ALL | PRIMARY | NULL | NULL | NULL | 93490 | Using where | +----+-------------+---------+------+---------------+------+---------+------+-------+-------------+ 1 row in set (0.00 sec) |
Why on the earth index would not be used you would think, even if MySQL is mentioning it in “possible keys” ? Should you try to force it ?
Using MyISAM in production
June 17, 2006 By 36 Comments
There were recently number of posts about MyISAM, for example Arjen wrote pretty nice article about MyISAM features so I thought I would share my own view on using MyISAM in production. For me it is not only about table locks. Table locks is only one of MyISAM limitations you need to consider using it [...]
