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MDEV-13073 This part merges the Ali semisync related changes

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and specifically the ack receiving functionality.
Semisync is turned to be static instead of plugin so its functions
are invoked at the same points as RUN_HOOKS.
The RUN_HOOKS and the observer interface remain to be removed by later
patch.

Todo:
  React on killed status by repl_semisync_master.wait_after_sync(). Currently
  Repl_semi_sync_master::commit_trx does not check the killed status.

  There were few bugfixes found that are present in mysql and its unclear
  whether/how they are covered. Those include:

  Bug#15985893: GTID SKIPPED EVENTS ON MASTER CAUSE SEMI SYNC TIME-OUTS
  Bug#17932935 CALLING IS_SEMI_SYNC_SLAVE() IN EACH FUNCTION CALL
                 HAS BAD PERFORMANCE
  Bug#20574628: SEMI-SYNC REPLICATION PERFORMANCE DEGRADES WITH A HIGH NUMBER OF THREADS
This commit is contained in:
Andrei Elkin
2017-11-22 17:10:34 +02:00
committed by Monty
parent abceaa7542
commit e972125f11
32 changed files with 1197 additions and 695 deletions
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2
mysql-test/suite/perfschema/r/relaylog.result
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@ -86,6 +86,7 @@ EVENT_NAME COUNT_STAR SUM_TIMER_WAIT MIN_TIMER_WAIT AVG_TIMER_WAIT MAX_TIMER_WAI
wait/synch/cond/sql/MYSQL_RELAY_LOG::COND_bin_log_updated 0 0 0 0 0
wait/synch/cond/sql/MYSQL_RELAY_LOG::COND_queue_busy 0 0 0 0 0
wait/synch/cond/sql/MYSQL_RELAY_LOG::COND_relay_log_updated 0 0 0 0 0
wait/synch/mutex/sql/MYSQL_RELAY_LOG::LOCK_binlog_end_pos 0 0 0 0 0
wait/synch/mutex/sql/MYSQL_RELAY_LOG::LOCK_index 0 0 0 0 0
connection slave;
"============ Performance schema on slave ============"
@ -193,5 +194,6 @@ EVENT_NAME COUNT_STAR
wait/synch/cond/sql/MYSQL_RELAY_LOG::COND_bin_log_updated NONE
wait/synch/cond/sql/MYSQL_RELAY_LOG::COND_queue_busy NONE
wait/synch/cond/sql/MYSQL_RELAY_LOG::COND_relay_log_updated MANY
wait/synch/mutex/sql/MYSQL_RELAY_LOG::LOCK_binlog_end_pos NONE
wait/synch/mutex/sql/MYSQL_RELAY_LOG::LOCK_index MANY
include/stop_slave.inc