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Code Activity

Adieu slave_list

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slave_list was used to provide data for SHOW SLAVE HOSTS and
Slaves_connected status variable.

Introduced binlog_dump_thread_count which is exposed via Slaves_connected
(replaces slave_list.records).

Store Slave_info on THD and access it by iterating server_threads
(replaces slave_list).

Added:
THD::slave_info
binlog_dump_thread_count
show_slave_hosts_callback()

Removed:
slave_list
SLAVE_LIST_CHUNK
SLAVE_ERRMSG_SIZE
slave_list_key()
slave_info_free()
init_slave_list()
end_slave_list()
all_slave_list_mutexes
init_all_slave_list_mutexes()
key_LOCK_slave_list
LOCK_slave_list

Moved:
SLAVE_INFO -> Slave_info
register_slave() -> THD::register_slave()
unregister_slave() -> THD::unregister_slave()

Also removed redundant end_slave() from close_connections(): it is called
again soon afterwards by clean_up().

Pre-requisite for clean MDEV-18450 solution.
This commit is contained in:
Sergey Vojtovich
2019-03-02 00:41:33 +04:00
parent 68c765d313
commit 2b711d231a
10 changed files with 77 additions and 146 deletions
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3
mysql-test/suite/perfschema/t/server_init.test
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@ -70,9 +70,6 @@ select count(name) from mutex_instances
select count(name) from mutex_instances
where name like "wait/synch/mutex/sql/LOCK_crypt";
select count(name) from mutex_instances
where name like "wait/synch/mutex/sql/LOCK_slave_list";
select count(name) from mutex_instances
where name like "wait/synch/mutex/sql/LOCK_active_mi";