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26.12.5.2 The events_stages_history Table
The events_stages_history table
contains the N most recent stage
events that have ended per thread. Stage events are not added
to the table until they have ended. When the table contains
the maximum number of rows for a given thread, the oldest
thread row is discarded when a new row for that thread is
added. When a thread ends, all its rows are discarded.
The Performance Schema autosizes the value of
N during server startup. To set the
number of rows per thread explicitly, set the
performance_schema_events_stages_history_size
system variable at server startup.
The events_stages_history table
has the same columns and indexing as
events_stages_current. See
Section 26.12.5.1, “The events_stages_current Table”.
TRUNCATE TABLE is permitted for
the events_stages_history table.
It removes the rows.
For more information about the relationship between the three stage event tables, see Section 26.9, “Performance Schema Tables for Current and Historical Events”.
For information about configuring whether to collect stage events, see Section 26.12.5, “Performance Schema Stage Event Tables”.
Document created the 26/06/2006, last modified the 26/10/2018
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