lock timeout

MySQL Error code list: 1005: Failed to create table 1006: Failed to create database 1007: Database already exists, failed to create database 1008: Database does not exist, delete database failed 1009: Unable to delete database file causes

What is stored procedures: stored procedures can be said to be a recordset, it is a number of T-SQL statements composed of blocks of code, these T-SQL statement code like a method to implement a number of functions (for a single table or multiple

I. Introduction of Distributed Locks Distributed locks are mainly used to protect mutually exclusive access to shared resources across processes, across hosts and across networks in a distributed environment to ensure data consistency. Ii.

Distributed locks can be implemented using Redis's SETNX command, which is described below. setnx Command Introduction command Format Setnx Key value Set the value of key to value when and only if key does not exist.If the given key already exists,

MySQL error code table, according to the MySQL header file Mysql/include/mysqld_error.h collation. Wrong place, please correct me. 1005: Failed to create table 1006: Failed to create database 1007: Database already exists, failed to create database 1

Atitit Lifting Database Deadlock processing summaryIn normal terms, the lock is self-motivated. No official.Normally, insert does not need to add rowlock, it is the default is Rowlock,#-----The lock's own active conversion principle. (Normal ignore

Usage:Pg_dump [OPTION] ... [DBNAME] DatabaseLast name, do not specify the default is the database specified by the system variable pgdatabase.General Options: (generic option)-F,--file=filename output file or directory nameFile name saved after

I. Introduction to SQL Profiler toolsTransferred from: http://www.cnblogs.com/kissdodog/p/3398523.htmlSQL Profiler is a graphical interface and a set of system stored procedures that function as follows: Graphical monitoring of SQL Server

ObjectiveMany times, RDS users often ask how to tune RDS MySQL parameters, in order to answer this question, write a blog to explain:Which parameters can not be modified, then some parameters may be modified;These parameters that provide

A MySQL common command1. Open the Log1) show global variables like "%genera%";2)set global general_log=on;3)set global general_log=off;2. MySQL If you open set autocommit=0, then all the statements must be in one transaction3. Show Engine InnoDB

Source: http://www.cnblogs.com/knowledgesea/archive/2013/01/02/2841588.htmlIntroduction to Stored ProceduresWhat is a stored procedure : A stored procedure can be said to be a recordset, which is a block of code consisting of some T-SQL statements

Since there are many c++11 features within 8.0. Requires gcc4.8 version above. The RHEL6 series default GCC is 4.7. Still check after installing gcc6.1.The reason may be that the 6.1 version is not necessarily higher than 4.7 and is not discussed at

In the practice project, MySQL row-level locks are not used. Instead, the use of inventory increases and decreases through RABBITMQ queues. Two tables update data by displaying the Create transaction implementation. During the testing process,

SQL Server Profiler Tool One, Introduction to SQL Profiler toolsSQL Profiler is a graphical interface and a set of system stored procedures that function as follows: Graphical monitoring of SQL Server queries; Collect query information

First, prefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. Here is a concise explanation, for the following description of the convenience, where T1 represents a database execution request, T2

http://blog.csdn.net/hpb21/article/details/7852934Look for some information to see the next. The learning experience is as follows:1 MySQL update RedisMySQL update redis references memcache with MySQL communication, using MySQL UDF, each update

130: The file format is incorrect. (It's not clear what the wrong situation is)145: File could not be opened.1005:mysql Creating table Failed　　1006:mysql failed to create database　　1007:mysql database already exists, database creation

One MySQL often uses commands1. Open the Log1) show global variables like "%genera%";2)set global general_log=on;3)set global general_log=off;2. MySQL assumes that set autocommit=0 is open, then all statements must be in one transaction3. Show

MySQL's InnoDB storage engine supports transactions, which by default are row locks. Because of this feature, the database supports high concurrency, but if the InnoDB update data is not a row lock, but a table lock, then its concurrency will be

MySQL timeout know how many------by stone pot mix riceHow much does 1.timeout variable know?Open MySQL, with the show variables like ‘%timeout%‘ command to see, do not see do not know, a look startled, the results as shown below, so many timeout