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26.12.7.2 The events_transactions_history Table
The events_transactions_history
table contains the N most recent
transaction events that have ended per thread. Transaction
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_transactions_history_size
system variable at server startup.
The events_transactions_history
table has the same columns and indexing as
events_transactions_current. See
Section 26.12.7.1, “The events_transactions_current Table”.
TRUNCATE TABLE is permitted for
the events_transactions_history
table. It removes the rows.
For more information about the relationship between the three transaction event tables, see Section 26.9, “Performance Schema Tables for Current and Historical Events”.
For information about configuring whether to collect transaction events, see Section 26.12.7, “Performance Schema Transaction Tables”.
Document created the 26/06/2006, last modified the 26/10/2018
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