而其主要方式就是在每次select语句结束准备释放read view的时候,先判断这个read view是不是auto_commit的select,如果是就暂时不做维护trx_sys->mvcc链表的操作,让其保存在MVCC的m_views中,只是对read view做一个操作设置其属性m_closed = true,这样就不存在维护trx_sys结构,那么也就不需要trx_sys->mutex。当然如...
m_ids.front():m_low_limit_id;如果m_ids有活跃RW事务,就设置m_up_limit_id为m_ids vector的第一个(最小的一个)->m_closed=false;设置为false->MVCC::view_add(view_add(view))->ut_ad(trx_sys_mutex_own())还是先断言加锁->UT_LIST_ADD_FIRST(m_views,const_cast<ReadView*>(view))加入到...
The synch/mutex/innodb/trx_sys_mutex event occurs when there is high database activity with a large number of transactions.
typedef ib_mutex_t TrxSysMutex using Rsegs_Vector = std::vector< trx_rseg_t *, ut::allocator< trx_rseg_t * > > using Rseg_Iterator = Rsegs_Vector::iterator template<size_t N> using Rsegs_array = std::array< trx_rseg_t *, N > typedef std::priority_queue< TrxUndoRsegs, st...
static void trx_sys_mutex_enter ()Acquire the trx_sys->mutex. More...static void trx_sys_mutex_exit ()Release the trx_sys->mutex. More...static bool trx_sys_mutex_own ()Test if trx_sys->mutex is owned. More...static bool trx_sys_serialisation_mutex_own ()...
@param[in] dict_locked true if dict_sys mutex acquired */ void Expand Down 4 changes: 3 additions & 1 deletion 4 storage/innobase/dict/dict0load.cc Show comments View file Edit file Delete file This file contains bidirectional Unicode text that may be interpreted or compiled differently...
Status:ClosedImpact on me: None Category:MySQL Server: InnoDB storage engineSeverity:S5 (Performance) Version:8.0OS:Any Assigned to:CPU Architecture:Any [5 Jan 2023 6:09] Simmon Wu Description:In our test, running command: SELECT * FROM performance_schema.data_lock_waits; when there are more...
Bug #54982trx_create and kernel_mutex Submitted:3 Jul 2010 16:12Modified:13 Feb 2012 1:46 Reporter:Mark CallaghanEmail Updates: Status:Won't fixImpact on me: None Category:MySQL Server: InnoDB Plugin storage engineSeverity:S5 (Performance) ...
Performance_schema_mutex_classes_lost 0 Performance_schema_mutex_instances_lost 0 Performance_schema_rwlock_classes_lost 0 Performance_schema_rwlock_instances_lost 0 Performance_schema_session_connect_attrs_lost 0 Performance_schema_socket_classes_lost 0 ...
synch/mutex/innodb/aurora_lock_thread_slot_futex synch/mutex/innodb/buf_pool_mutex synch/mutex/innodb/fil_system_mutex synch/mutex/innodb/trx_sys_mutex synch/sxlock/innodb/hash_table_locks Menyesuaikan Aurora MySQL dengan status thread creating sort index sending data Menyesuaikan Aurora MySQL ...