mysql deadlock detection

; } class Program {private Resource mainres = new Resource () {Data = "mainres"}; Private Resource workerres = new Resource () {Data = "workerres"}; static void Main (string[] args) {Thread.CurrentThread.Name = "main"; Program P = new program (); Thread worker = new Thread (P.T2); Worker. Name = "worker"; Worker. Start (); T1 (P); } #region Use the Monitor.TryEnter method-detects where a

The book "Advanced Programming in UNIX environments" comes with many small and exquisite programs. When I read this book, rewrite the code in the book according to your own understanding (most of them are on the copybook) to deepen your understanding (it's too difficult to read a book, huh, huh ). This example is successfully tested on ubuntu10.04. Program Introduction: In this example, a program with deadlocks occurs. // Apue Program 14-2: Lock and unlock a file area // apue Program 14-4:

Deadlock detection. Load Sosex.dll 0:004>! Dlk 0:>!mk-aThe MK command displays a call stack of the currently selected thread (including both managed and unmanaged frames).The command has now been extended to support the-a switch which outputs both the local variables as well as parameters(Combination of-l and-p switches):0:003>!finq　　The FINQ command (finalization queue) lists all the objects that is on the

monitor 0x0000000004eca3e8 (Object 0x00000000d60ba308, a java.lang.Object),Which is held by "Thread-0""Thread-0":Waiting to lock monitor 0x0000000004ecb7d8 (Object 0x00000000d60ba318, a java.lang.Object),Which is held by "Thread-1"Java stack information for the threads listed above:==================================================="Thread-1":At Com.liu.demo.test.thread.deadlocktest$2.run (deadlocktest.java:36)-Waiting to lock -Locked At Java.lang.Thread.run (thread.java:745)"Thread-0":At Com.l

,Belockspidremark varchar (max),Belockeventtype varchar (max),Belockeventinfo varchar (max),Lockspid INT,Lockspidremark varchar (max),Lockeventtype varchar (max),Lockeventinfo varchar (max))--Get deadlock processDECLARE Dbcc_inputbuffer CURSOR read_onlyThe for select SPID is locked by the process id,blocked lock process ID from master. sysprocesses WHERE blocked>0DECLARE @lockedspid intDECLARE @belockedspid intOPEN Dbcc_inputbufferFETCH NEXT from Dbcc

Health Center is an IBM monitoring and diagnostics tool for Java and is a free low-cost diagnostic tool and API for monitoring applications running on the IBM Java virtual machine (JVM). See part 1th for details on the operations that this API can perform. In this article, you will use the deadlock detection application developed in part 1th and add a method to analyze the view to show where the application

, T2 READ, ...; [Do something with tables T1 and T2 here]; COMMIT; UNLOCK TABLES; Table-level locking allows your business to queue up well and deadlock is avoided. The way to get a serialized transaction is to create a secondary "semaphore" table that contains only one single row. Let each transaction update that row before accessing the other tables. In this way, all transactions occur in a sequential fashion. Note that the InnoDB instant

carpenters nailed the floor, one with only one axe, and the other without a hammer, but with a nail 2. The phenomenon of traffic jams After reading the definition and visualization of deadlocks, when will deadlock detection be performed for MySQL? 2.MySQL Deadlock

"MySQL Lock processing analysis" Background Mysql/innodb's lock analysis has always been a difficult topic. In the course of my work, I often have colleagues who have consulted on this issue. At the same time, Weibo also often receive MySQL lock-related dms, let me help solve some deadlock problems. This paper, to prep

or commit or rollback.Two. Check the cause of the deadlockIf a deadlock occurs, you can use the show ENGINE INNODB STATUS command to determine why the last deadlock occurred. The results of the return include details of the deadlock-related transaction, such as the SQL statement that caused the deadlock, the locks tha

Tags: bug isolated multiple nod read/write Mutex detection log sharing found that when the SQL statement of the backup table runs at the same time as the SQL statement that deletes part of the data from the table, MySQL detects the deadlock and prints out the log Case descriptionDuring a timed script run, MySQL detects

Label:1 deadlock problem background 1 1.1 An incredible deadlock 1 1.1.1 Preliminary analysis 3 1.2 How to read deadlock logs 3 2 deep analysis of the cause of deadlock 4 2.1 Lock logic for delete operations 4 2.2 Deadlock Prevention Strategy 5 2.3 Anatomy of the cause of th

Tags: www. Kernel get also executes the plan and Comm ISA primary keyOne of the most incredible MySQL deadlock analysis Deadlock problem Background Do MySQL code in-depth analysis also some years, plus their own 10 years or so of database core research and development experience, since the

Tags: MySQL database database administrator database engineer Beijing MySQLThe deadlock situation occurs when different transactions have a lock on each other's needs, which leads to infinite waiting between each other. Deadlocks can occur when different transactions impose locks on multiple identical tables and identical rows, but the order in which transactions operate on tables differs. To reduce the

Mysql database deadlock causes and solutions, mysql Deadlock (Deadlock) Deadlock: a deadlock occurs when two or more processes compete for resources during execution. If there is no ext

;commit; START TRANSACTION;update girl SET age=18 where id=1;update girl set age=29 where id=2;COMMIT; That is to say, in practice, if we encounter similar problems, although innodb has performed error detection for us, we still need to avoid deadlocks. Old Man Wang 'er [SQL] START TRANSACTION;Affected rows: 0Time: 0.037 s[SQL]UPDATE girl set age = 19 where id = 1;Affected rows: 0Time: 0.001 s [SQL] START TRANSACTION;Affect

This article mainly introduces the cause and solution of the mysql database deadlock. For more information, see Deadlock (Deadlock) Deadlock: A deadlock occurs when two or more processes compete for resources during execution. if

Tags: view begin. exe password pwd mat UTF8 att spanThis article describes how to get deadlock logging, not how to resolve a deadlock problem.The deadlock of MySQL can be viewed through show engine InnoDB status;But show engine InnoDB status; only the most recent deadlock ca

related to some lock knowledge The InnoDB lock is subdivided into the following seed types: The record lock (RK) lock is directly added to the index record, and the key Gap Lock (GK) Gap Lock is locked, locking a range but excluding the record Itself. The purpose of the gap lock is to prevent two times of the same transaction from being read, the presence of Phantom reads next key lock (NK) row lock and Gap lock together called Next-key lock insert inte Ntion Lock (IK)

indexes) brought by level two indexes. You can refer to the analysis here: http://hedengcheng.com/?p=771 4, business less use or no lock in share mode, for update such a display lock, and should try to take the snapshot read. 5, write SQL, pay attention to use the Explain Command analysis execution plan, can walk Index walk index, can walk overlay index (avoid query unnecessary column). But there is no more useful deadlock