Sergei Petrunia

Sergei Petrunia's picture

Personal information

First name
Last name
Monty Program Ab
Job title
Optimizer Developer
Speaker Biography

Sergei Petrunia is a query optimizer developer at Monty Program Ab. He implemented MariaDB's optimizer features like Table Elimination (MariaDB 5.1), improvements to semi-join subquery optimizations (MariaDB 5.3/5.5) and SHOW EXPLAIN (MariaDB 10.0).

Prior to Monty Program, he has worked for MySQL Ab/Sun Microsystems, where he was the author of query optimizer features like Partition Pruning, Index Merge (MySQL 5.1), and numerous smaller improvements in query optimizer and other parts of the server.

He maintains a highly technical blog at


Member for
3 years 44 weeks

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