mysql deadlock

Nagios Add a custom monitoring project++++++++++++++++++++++++++++++++++++++++++++++++++++++++++System Environment: CentOS Linux release 7.2.1511 (Core)Nagios Version: 2.15Here with the Pt-dead-logger plug-in, run the plug-in, there will be a deadlock in the Test.deadlocks table to write the deadlock informationThis is done by detecting if the table has increased the number of rows to send an alarm.Nagios C

First, the preface MySQL InnoDB, support transaction and row level lock, can use row lock to handle the business such as user's mentioning. The use of MySQL locks sometimes deadlock, to do a good job of deadlock prevention. Second, MySQL row-level lock Row-level locks are

If a deadlock occurs, how can this problem be solved? Find the original lock ID and KILL the thread that has been held all the time. But how can we find the thread ID that causes the deadlock among many threads? Since MySQL has developed If a deadlock occurs, how can this problem be solved? Find the original lock ID a

1. Test descriptionEnvironment Description: RHEL 6.4 x86_64 + MySQL 5.5.37, transaction ISOLATION level RCTest table:Mysql> Show CREATE TABLE t1\g*************************** 1. Row *************************** table:t1create table:create Table ' t1 ' ( ' a ' int (one) not NULL DEFAULT ' 0 ', ' B ' int (one) default NULL, PRIMARY key (' a '), key ' B ' (' B ')) Engine=innodb default charset=utf81 row in Set (0.00 SE CTo test the data in the ta

Use MySQLInnoDB engine lock mechanism to solve deadlocks: When I used Show innodb status to check the engine status, I found a deadlock problem: * ** (1) TRANSACTION: TRANSACTION 0 677833455, ACTIVE 0 sec, process no 11393, OS thread id 278546 starting index read Mysql tables in use 1, locked 1 LOCK wait3 lock struct (s), heap size 320 MySQL thread id 83, query

not locked. The following is the deadlock caused by the MySQL for update. After analysis, MySQL's InnoDB storage Engine practice Lock is a lock line, but it is locked internally, depending on whether the value of the Where condition and select is only primary KEY or Non-key key index to determine how the lock, such as only the primary key, the lock primary key index, if only a Non-key key, then the lock

Find the original MySQL deadlock ID. If a deadlock occurs, how can this problem be solved? Find the original lock ID and KILL the thread that has been held all the time. But how can we find the thread ID that causes the deadlock among many threads? MySQL has been very powerf

Tags: rapid technology mass detection mys products no coffee failureThis article mainly introduced the MySQL database lock generation reason and the solution, needs the friend can refer to the nextThe database, like the operating system, is a shared resource used by multiple users. When multiple users access data concurrently, in the database, multiple transactions are generated concurrently to access the same data. If the concurrency operation is not

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

Tags: disk will also analyze SRC Backup engine tree image BestCase descriptionDuring a timed script run, MySQL detects a deadlock and prints out a log when the SQL statement that backs up the table runs concurrently with the SQL statement that deletes the data from the table.The two SQL statements are as follows:(1) INSERT INTO backup_table select * from source_table(2) DELETE from source_table WHERE id>5 a

Tags: mysqlMySQL Deadlock etc 6 combat problems solved Directory: Unlocking after the lock table MySQL connection number is not enough MySQL Root password modification Password is correct but not logged in 0 issues with DateTime types View Table Footprint Unlocking after the lock tableWhen you do a DML operation on a table, it

This article mainly introduced the MySQL database lock generation reason and the solution, needs the friend can refer to the nextThe database, like the operating system, is a shared resource used by multiple users. When multiple users access data concurrently, in the database, multiple transactions are generated concurrently to access the same data. If the concurrency operation is not controlled, it is possible to read and store incorrect data and com

for a transaction2. Exclusive Lock: X Lock: SELECT * FROM Test where ... for update; An exclusive read-write lock on one row for a transactionTwo1. View the Deadlock log command: show engine InnoDB status \g; Specific deadlock reference: 1190000009469556Session 1:SELECT * FROM test where id = 1 for update;Session 2:Update Test Set name = "QQ" WHERE id = 1;When Session1 and Session2 are running simultaneou

Tags: ima commit res foreign thread CTS blog Wait baseReprint Address: http://yueliangdao0608.blog.51cto.com/397025/1180917 If you encounter a deadlock, how to solve it? Find the original lock ID, and then kill the thread that has been holding it, but how many threads can find the thread ID that caused the deadlock? MySQL has evolved to the present, is very stron

This article describes how to find the deadlock ID in the MySQL thread, mainly from the data dictionary. For more information, see. If a deadlock occurs, how can this problem be solved? Find the original lock ID and KILL the thread that has been held all the time. but how can we find the thread ID that causes the deadlock