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MDEV-4702 - Reduce usage of LOCK_open

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Following variables do not require LOCK_open protection anymore:
- table_def_cache (renamed to tdc_hash) is protected by rw-lock
  LOCK_tdc_hash;
- table_def_shutdown_in_progress doesn't need LOCK_open protection;
- last_table_id use atomics;
- TABLE_SHARE::ref_count (renamed to TABLE_SHARE::tdc.ref_count)
  is protected by TABLE_SHARE::tdc.LOCK_table_share;
- TABLE_SHARE::next, ::prev (renamed to tdc.next and tdc.prev),
  oldest_unused_share, end_of_unused_share are protected by
  LOCK_unused_shares;
- TABLE_SHARE::m_flush_tickets (renamed to tdc.m_flush_tickets)
  is protected by TABLE_SHARE::tdc.LOCK_table_share;
- refresh_version (renamed to tdc_version) use atomics.
This commit is contained in:
Sergey Vojtovich
2013-08-14 12:48:50 +04:00
parent b882a3e83e
commit b7f9c89423
25 changed files with 1651 additions and 1247 deletions
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4
mysql-test/suite/perfschema/r/dml_setup_instruments.result
View File

@ -20,15 +20,15 @@ where name like 'Wait/Synch/Rwlock/sql/%'
order by name limit 10;
NAME ENABLED TIMED
wait/synch/rwlock/sql/LOCK_dboptions YES YES
wait/synch/rwlock/sql/LOCK_flush YES YES
wait/synch/rwlock/sql/LOCK_grant YES YES
wait/synch/rwlock/sql/LOCK_system_variables_hash YES YES
wait/synch/rwlock/sql/LOCK_sys_init_connect YES YES
wait/synch/rwlock/sql/LOCK_sys_init_slave YES YES
wait/synch/rwlock/sql/LOCK_tdc YES YES
wait/synch/rwlock/sql/LOGGER::LOCK_logger YES YES
wait/synch/rwlock/sql/MDL_context::LOCK_waiting_for YES YES
wait/synch/rwlock/sql/MDL_lock::rwlock YES YES
wait/synch/rwlock/sql/Query_cache_query::lock YES YES
wait/synch/rwlock/sql/THR_LOCK_servers YES YES
select * from performance_schema.setup_instruments
where name like 'Wait/Synch/Cond/sql/%'
and name not in (