table (added in MySQL 5.7.3) contains the most recent 10
transaction events per thread. To change the table size,
system variable at server startup. Transaction events are not
added to the table until they have ended. As new events are
added, older events are discarded if the table is full.
table has the same structure as
Section 18.104.22.168, “The events_transactions_current Table”.
For information about configuration of transaction event collection, see Section 21.9.7, “Performance Schema Transaction Tables”.