Workload Analysis with MySQL's Performance Schema

This post details the use of MySQL's Performance Schema, specifically `table_io_waits_summary_by_index` and `events_statements_summary_by_digest`, to identify and resolve performance bottlenecks. It highlights an example of an inefficient update query on the `repositories` table that was responsible for a significant portion of updates, and how a simple code change reduced its impact. It also provides an example query to identify the top 10 most frequent UPDATE queries.