Jesper Wisborg Krogh has worked with MySQL since 2006 as an SQL developer, a database administrator, and for more than eight years as part of the Oracle MySQL Support team. He earned a PhD in computational chemistry before moving to MySQL and software development. He has spoken at MySQL Connect and Oracle OpenWorld, regularly blogs about MySQL, and has authored around 800 documents in the Oracle Knowledge Base. He has also contributed to the sys schema and to four Oracle Certified Professional exams for MySQL 5.6 to 8.0.
His books, both published by Apress, are MySQL 8 Query Performance Tuning (2020) and MySQL Concurrency (2021). His areas of expertise include MySQL Cluster, MySQL Enterprise Backup, performance tuning, and the Performance Schema and sys schema.