0
votes
1answer
129 views

Large queries on MyISAM tables crashing MySQL

I have a PHP website, which is using the third-party software ResourceSpace, that when I installed it, it used my default storage engine to create the tables, which at the time was MyISAM. Now that ...
2
votes
1answer
1k views

Why does that query cause lock wait timeouts?

From time to time, I find a lot of these errors in my PHP error log: MYSQL.1213: Deadlock found when trying to get lock; try restarting transactionSQL The problem persists for about 2 or 3 minutes. ...
5
votes
3answers
993 views

InnoDB Master-Master replication goes inconsistant after power failure tests

Afternoon gents, I'm currently stress testing a Master-Master replication setup using InnoDB as database engine. We're using this simple script for testing which we run in Linux CLI from a remote ...
3
votes
3answers
7k views

How to use insert delay with the InnoDB engine and use less connection for insert statements?

I'm working on an application which involves a lot of database writes, approximately ~70% inserts and 30% reads. This ratio would also include updates which I consider to be one read and one write. ...
2
votes
2answers
1k views

Preventing mysql deadlocks in your php application that uses SELECT… LOCK IN SHARE MODE

If I understand SELECT ... LOCK IN SHARE MODE correctly, you can place it into a mysql transaction to select the rows you will be working with during that transaction. This is done in order to "lock ...
4
votes
1answer
2k views

MySQL 'LOAD DATA INFILE' : Can't replace entry when foreign key exists

Here's a minimal case for my database scheme: CREATE TABLE `test` ( `id` int(11) NOT NULL, `name` varchar(22) DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE KEY `id` (`id`) ) ENGINE=InnoDB DEFAULT ...