MySQL Performance Blog

We have finally found the time to update out presentation pages – we’ve added the presentation on MySQL Scaling by Sharding and Replication as well as Russian Language presentations I’ve given at HighLoad++ conference back in October.
Innodb Scalability and New Features (Russian),
Scaling MySQL-powered Web Sites by Sharding and Replication (Russian),
Wonderful World of MySQL Storage Engines (Russian).

Now some feedback about these events
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Occasionally there is a need to see what queries reach MySQL. The database provides several ways to share that information with you. One is called general log activated with --log (or --general-log in MySQL 5.1+) start-up parameter. The log writes any query being executed by MySQL to a file with limited amount of additional information. The other is slow log enabled by --log-slow-queries parameter (MySQL 5.1 requires also --slow-query-log), which was designed to store poorly performing queries that run at least 2 seconds. Percona actually extended the slow log to, among others, include any query regardless of the execution time.

The problem is that for both you need to prepare earlier either by enabling the logging before starting the database instance or, even more work, by applying the patch and rebuilding the entire database from sources.
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