struct lock_sys_t{LockMutex mutex;hash_table_t*rec_hash;hash_table_t*prdt_hash;hash_table_t*prdt_page_hash;LockMutex wait_mutex;srv_slot_t*waiting_threads;srv_slot_t*last_slot;int n_waiting;};struct lock_t{trx_t*trx;UT_LIST_NODE_T(lock_t)trx_locks;dict_index_t*index;lock_t*h...
sys_lockdown ( in lock_action integer , in listeners_mode integer ); Description You must have DBA privileges to run that function. Calling this with lock_mode = 1 causes the server not to accept any new client connections, except ones coming from localhost (127.0.0.1). This will also...
blocking_lock_id: 被请求的锁 ID。 blocking_lock_type: 持有的锁类型。 blocking_lock_mode: 持有的锁模式。 sql_kill_blocking_query: 可以用来终止持有锁的查询的 SQL 命令。 sql_kill_blocking_connection: 可以用来终止持有锁的连接的 SQL 命令。 示例输出 执行SELECT * FROM sys.innodb_lock_waits;返回...
struct lock_sys_t{LockMutex mutex;hash_table_t* rec_hash;hash_table_t* prdt_hash;hash_table_t* prdt_page_hash;LockMutex wait_mutex;srv_slot_t* waiting_threads;srv_slot_t* last_slot;int n_waiting;}; struct lock_t {trx_t* trx;UT_LIST_NODE_T(lock_t) trx_locks;dict_index_t*...
新的动态视图sys.dm_tran_locks能够返回系统中当前活动的锁管理器资源信息。这个视图返回的信息类型和sp_lock一样,但提供了更多细节。关键是这是一个视图,允许数据库管理员轻松的将其连接到其他表。 自定义sp_lock例子 USE MASTER GO CREATE PROCEDURE [dbo].[sp_Lock_Detail] ...
grant execute on sys.dbms_lock to xxxx 是什么意思 这条SQL命令是在Oracle数据库中使用的,它的目的是授予一个用户或角色执行sys.dbms_lock包中所有过程和函数的权限。sys.dbms_lock是Oracle提供的一个内置包,用于处理应用程序锁定。 GRANT:这是SQL中用于授权的关键字。
When a lock is released (due to cancellation in Step 3, or clean up in Step 4), the Lock-sys inspects the corresponding lock queue to see if one or more of the WAITING locks in it can now be granted. If so, some locks become GRANTED and the Lock-sys signals their threads to wak...
Low Level Design The Lock-sys orchestrates access to tables and rows. Each table, and each row, can be thought of as a resource, and a transaction may request access right for a resource. As two transactions operating on a single resource can lead to problems if the two operations conflict...
SYS(2011) - Current Lock Status SYS(2012) - Memo Field Blocksize SYS(2013) - System Menu Name String SYS(2014) - Minimum Path SYS(2015) - Unique Procedure Name SYS(2016) - SHOW GETS WINDOW Name SYS(2017) - Display Startup Screen SYS(2018) - Error Message Parameter SYS(2019) - Con...
在程式碼中,函數調用Cy_SysClk_PllGetLockStatus(fllpll - 1ul)會從fllpll參數中減去 1。 但是,在Cy_SysClk_PllGetLockStatus函數中,clkPath參數再次減少。 這會導致多餘減法。 我相信函數調用應該是Cy_SysClk_PllGetLockStatus(fllpll)而不是Cy_SysClk_PllGetLockSta...