20.9.4. Performance Schema Stage Event Tables

20.9.4.1. The events_stages_current Table
20.9.4.2. The events_stages_history Table
20.9.4.3. The events_stages_history_long Table

The Performance Schema instruments stages, which are steps during the statement-execution process, such as parsing a statement, opening a table, or performing a filesort operation. Stages correspond to the thread states displayed by SHOW PROCESSLIST or that are visible in the INFORMATION_SCHEMA.PROCESSLIST table. Stages begin and end when state values change.

Within the event hierarchy, wait events nest within stage events, which nest within statement events.

These tables store stage events:

events_stages_current: Current stage events
events_stages_history: The most recent stage events for each thread
events_stages_history_long: The most recent stage events overall