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Keep track of each recently active XID, recording which worker it was queued on. If an XID might still be active, choose the same worker to queue event groups that refer to the same XID to avoid conflicts. Otherwise, schedule the XID freely in the next round-robin slot. This way, XA PREPARE can normally be scheduled without restrictions (unless duplicate XID transactions come close together). This improves scheduling and parallelism over the old method, where the worker thread to schedule XA PREPARE on was fixed based on a hash value of the XID. XA COMMIT will normally be scheduled on the same worker as XA PREPARE, but can be a different one if the XA PREPARE is far back in the event history. Testcase and code for trimming dynamic array due to Andrei. Reviewed-by: Andrei Elkin <andrei.elkin@mariadb.com> Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org> |
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| .. | ||
| extension | ||
| include | ||
| r | ||
| t | ||
| disabled.def | ||
| my.cnf | ||
| README | ||
| rpl_1slave_base.cnf | ||
How to run. =========== ./mysql-test-run.pl --suite=rpl --mysqld=--binlog-format=mixed