mysql deadlock detection

MySQL does not provide direct variables for deadlock. The performance_shcema after version 5.5 can provide detailed information about the lock (but we still have 5.0) MySQL does not provide direct variables for deadlock. The performance_shcema after version 5.5 can provide detailed information about the lock (but we st

MySQL does not provide direct variables for deadlock. For Versions later than Version 5.5, performance_shcema can provide detailed information about the lock (but we are still 5.0). For Innodb_lock_monitor, the output of innodb_monitor is always output to the error log, which is inconvenient for comparison. I use zabbix for monitoring and send data to zabbix server passively using agent. The script is shell

Tags: output ase innodb dead actions htm details recursive MySQL deadlockRecently encountered "TOO deep OR LONG SEARCH in the LOCK TABLE waits-for GRAPH, WE'll roll back following TRANSACTION". Re-review the benefit of a lot of, which the deadlock of the rules, in fact, we have 5 years ago to solve the first version of the second kill scene has been involved, and the idea is very similar, if there is time,

On a high-concurrency MySQL server, transactions will recursively detect deadlocks. When the depth is exceeded, the performance decline will become unacceptable. FACEBOOK has long proposed to prohibit deadlocks. On a high-concurrency MySQL server, transactions will recursively detect deadlocks. When the depth is exceeded, the performance decline will become unacceptable. FACEBOOK has long proposed to prohi

TPS.Workaround:Keep the lock waiting as small as possible by setting the wait queue at the database layer to achieve this effect, and onesql built-in this scenario.Test Case:Update Miaosha set mount=mount+1 where id=1;Test environmentThe key parameters for MySQL and Onesql are configured as follows and are not turned on Binlog Database Innodb_flush_log_at_trx_commit Innodb_log_file_size

For deadlocks, MySQL does not provide a direct variable to represent. For the 5.5 version of Performance_shcema can provide the details of the lock (but we are still 5.0), for Innodb's own monitor innodb_lock_monitor its output is always output to the error log, inconvenient to compare. I monitor the use of Zabbix, using the agent passive way to Zabbix server to transfer data. Script for Shell, with show InnoDB status redirect Core code: Detect if

14.5.5.2 deadlock detection and Rollback deadlock detection and rollback InnoDB automatic transaction deadlock and rollback a transaction InnoDB try to pick a small transaction to roll back and forth, the size of the transaction is Rows inserted, updated, or deleted the n

deadlock occurs. IF (ERROR_NUMBER () = 1205) PRINT 'transaction 2 has deadlocked '-- write SQL Server logs or return an error to the application END CATCHSELECT iID, sGoodsName FROM dbo. goods WHERE iID = 2; SELECT iSortID, sSortName FROM dbo. goods_sort WHERE iSortID = 1003; GO Then run transaction 1 and run transaction 2 immediately. In this case, a deadlock occurs in a transaction and the modification i

Atitit. Thread deadlock run-fly detection with auto-unlock with manual unlock java C #. NET PHP JavaScript.1. Phenomenon:: The main program stuck unresponsive, multi-line tasks do not go down 12. Reason:: Use jv jprofile View Thread, the original two threads deadlock. 13. Java Disadvantage, default cannot automatically unlock

Transferred from: http://www.cnblogs.com/mumuxinfei/p/4365697.htmlPreface:The previous blog post describes the use and principles of Pstack . Like Jstack, Pstack can get a thread stack snapshot of the process for easy inspection and performance evaluation. But the Jstack function is more powerful, it can be prompted for potential deadlock , and pstack only provide clues, need gdb further determination.Under Linux, how to detect deadlocks , how to make

, but in the actual execution. Users canIt is not known which sentence to generate a deadlock. You can shut down the program and restart it.Often encountered this problem in the use of Oracle, so also summed up a little solution. 　　 1) To find the deadlock process: Sqlplus "/Assysdba" (Sys/change_on_install) From V$locked_object l,v$ WHERE L.session_id=s.sid; 2) Kill the

This article belongs to the Concurrent programming network multithread study Comb series. The original text is as follows: Deadlock A deadlock is one in which two or more threads block a lock that waits for another thread in a deadlock state to hold. Deadlocks usually occur when multiple threads are simultaneously requesting the same set of locks in a different

MySQL deadlock analysis, mysql deadlock1. Test Description Environment Description: RHEL 6.4 x86_64 + MySQL 5.5.37. The transaction isolation level is RC. Test Table: mysql> show create table t1\G*************************** 1. row *************************** Table: t1

End TRY BEGIN CATCH IF (xact_state () =-1) ROLLBACK TRAN; A--error_number () value of 1205 indicates a deadlock IF ( error_number () = 1205) PRINT ' Transaction 2 has a deadlock ' -write SQL The server log either returns an error to the application end CATCH SELECT iid,sgoodsname from Dbo.goods WHERE iid=2; SELECT isortid,ssortname from Dbo.goods_sort WHERE isortid=1003; Then run transaction 1, then

content representation being deadlocked.Status: State, active indicates deadlockMachine: The device where the deadlock statement resides.Program: The main application that generated the deadlock statement. 2) You can view the deadlock statement by executing the following statement with the DBA userSelect Sql_text from V$sql where Hash_value in(se

SQL Server Performance Analysis-deadlock detection database blocking statementsWork in the database often appear in memory, found an articleRefer to Csdn, China Wind (Roy) A deadlock article block: One of the transactions is blocked, other transactions wait for the other party to release their locks, and can cause deadlock