mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-05-14 19:07:15 +02:00
Code Issues Projects Releases Packages Wiki Activity

MDEV-4702 - Reduce usage of LOCK_open

Browse source 
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
commit b7f9c89423
25 changed files with 1651 additions and 1247 deletions
Download patch file Download diff file Expand all files Collapse all files

3
sql/mysqld.h
View file

@ -160,7 +160,6 @@ extern ulonglong query_cache_size;
extern ulong query_cache_limit;
extern ulong query_cache_min_res_unit;
extern ulong slow_launch_threads, slow_launch_time;
extern ulong table_cache_size, table_def_size;
extern MYSQL_PLUGIN_IMPORT ulong max_connections;
extern ulong max_connect_errors, connect_timeout;
extern my_bool slave_allow_batching;
@ -248,7 +247,7 @@ extern PSI_mutex_key key_BINLOG_LOCK_index, key_BINLOG_LOCK_xid_list,
key_LOCK_logger, key_LOCK_manager,
key_LOCK_prepared_stmt_count,
key_LOCK_rpl_status, key_LOCK_server_started, key_LOCK_status,
key_LOCK_table_share, key_LOCK_thd_data,
key_LOCK_thd_data,
key_LOCK_user_conn, key_LOG_LOCK_log,
key_master_info_data_lock, key_master_info_run_lock,
key_master_info_sleep_lock,