SQLTEXT.TEXT FROM sys.syslockinfo LOCK JOIN sys.sysprocesses PROCESS ON LOCK.REQ_SPID = PROCESS.SPID CROSS apply sys.DM_EXEC_SQL_TEXT(PROCESS.SQL_HANDLE) SQLTEXT WHERE PROCESS.SPID = 65 查询sys.dm_tran_locks我们可以
postgres=# INSERT INTO locktest VALUES (1), (2); INSERT 0 2 Row locks Scenario: two concurrent transactions are trying to select a row for update. PostgreSQL uses row-level locking in this case. Row level locking is tightly integrated with MVCC implementation, and uses hidden xmin and xma...
SELECT inst_id,sid,user_name,sql_id,sql_text,last_sql_active_time,sql_exec_id,cursor_type FROM GV$OPEN_CURSOR WHERE SID='137'; 如果是未提交语句,且通过方法1没有找到SQL语句,可以看下游标中是否有记录。如果有备份。直接查询游标的备份表。 第一次查询找到了未提交更新语句。 后续该会话又执行了其...
SQL> col type for a32; SQL> SELECT sid, 2 type, 3 id1, 4 id2, 5 lmode, 6 request 7 FROM v$lock 8 WHERE type = 'TX'; SID TYPE ID1 ID2 LMODE REQUEST --- --- --- --- --- --- 14 TX 589835 2213 0 4 14 TX 393232 2160 6 0 8 TX 589835 2213 6 0 SQL> col ev...
(relname,pageno)) ORDER BY lp; $$ LANGUAGE sql; => BEGIN; => UPDATE accounts SET amount = amount + 100.00 WHERE id = 1; --索引值不变 => UPDATE accounts SET id = 20 WHERE id = 2; ---索引值变了 => SELECT * FROM row_locks('accounts',0) LIMIT 2; ctid | xmax | lock_...
通过“Wait class "Application" was consuming significant database time”我们分析由于应用程序的问题导致enq: TX - row lock contention。再看SQL语句,基本判断是由于未COMMIT导致。 TX锁通常被称为事务锁,当一个事务开始时,如执行INSERT/DELETE/UPDATE/MERGE等操作或者使用SELECT ... FOR UPDATE语句进行查询时,会...
and t.sql_opname <> 'SELECT'; 1. 2. 3. 4. 5. 其实从ash也可以看到关于3548阻塞的信息,甚至从addm的建议中也会有类似建议: Rationale The session with ID 3548 and serial number 8795 in instance number 1 was the blocking session responsible for 52% of this recommendation's ...
Optimized locking is a Database Engine feature introduced in 2023 that drastically reduces lock memory, and the number of locks required for concurrent writes. This article has been updated to describe SQL Server Database Engine with and without optimized locking. Currently, optimized locki...
When the batch completes, if the batch-scoped transaction is not committed or rolled back, it is automatically rolled back by SQL Server. For more information, see Multiple Active Result Sets (MARS) in SQL Server. Starting Transactions Using API functions and Transact-SQL statements, you can ...
36 RELEVANT OBJECT: SQL statement with SQL_ID 36k2xpx3c6wr5 37 INSERT INTO EDI_MESSAGE_PROCESS_LOG(LOG_ID, SERVICE_TYPE, 38 SERVICE_STATUS, REFNO, REF_TYPE, MSG_ID, BL_NO, VOYAGE_ID, 39 VESSEL_NAME, IMO_NO, VOYAGE_NO, FUNCTION_TYPE, INPUT_DATE, IN_STATUS, ...