how to improve database performance

In a database, character-type data is the most, and can account for more than 80% of the entire database. It is very important to improve the performance of database to deal with character data correctly. In character data, the most used is char and

A medium-sized or large company is often comprised of geographically dispersed departments that typically require data sharing. For these shared data, it can be stored on a site that requires users to access from the site. The advantage of this

Oracle database is one of the most complex databases so far. It is this complexity that allows Oracle databases to face a wide variety of business needs. But most of the time, database administrators have some skills to make database maintenance

MyBatis Framework Execution Process: 1, configuration mybatis configuration file, Sqlmapconfig.xml (name is not fixed)2, through the configuration file, load MyBatis running environment, create sqlsessionfactory session factorySqlsessionfactory in

Optimization method of MySQL database program1, select the most applicable field properties MySQL can support a large amount of data access, but generally speaking, the smaller the table in the database, the faster the query executed on it.

1: Use partitioned tables to improve database performance Many of the previous processing of large amounts of data took the form of using multiple structured tables to be grouped by time, there are different data tables for data at different times,

Compressing database files can improve the performance of your database, but sometimes when you compress a database, you are reminded that the database cannot be compressed. If you delete a database object in an Access database, or if you delete an

1: Use partitioned tables to improve database performance Many of the previous processing of large amounts of data took the form of using multiple structured tables to be grouped by time, there are different data tables for data at different times,

Objective DB2 9 's Adaptive Utility throttling system enables maintenance to take place during peak periods. If you want to keep your car in good condition, you must maintain it regularly, such as replacing oil and spark plugs. This is also true

This part of this article is an excerpt from the Distributed Database Middleware (DDM) service of Huawei Cloud Help Center.BackgroundWith the growth of the business, the storage space of the logical library is not enough and the concurrency pressure

Read Catalogue What is a storage engine Two MySQL-supported storage engines Three using the storage engine What is a storage engineLibrary ===> folder created in MySQLTable ===> files created in the libraryThere are different

What is an index:The index in the database is similar to a catalog in a book, where you can quickly find the information you need without having to read the entire book. In the database, the index enables the database program to find the data that

Click above "Asynchronous Community", select" Top Public number "Technical dry, first time delivery statistics are similar to scout soldiers in war, and if intelligence work is not done well, war will be lost. Similarly, if the statistics of

This section holds Storage Engine Introduction (Learn) Table additions and deletions to change One, storage engine (Learn)The first few sections we know that MySQL built in the Library = = = folder, the table in the Library = = =

Many of the current projects are increasingly using SQL Server AlwaysOn architecture as a highly available clustering technology for databases.And most of the current Microsoft products, Citrix XenDesktop, XenApp, PVS, Xenmobile also support this

One, configuration fileThe service side and the client's character encoding is different, may cause garbled display and so on, in order to unify the character encoding at both ends, can be implemented through the configuration file, of course, such

The default version of MongoDB in the package installation source for Ubuntu and most Linux distributions is 2.4, but 2.4 uses a storage engine that does not support collecitons-level locks, only the database level, so a lock table occurs when a 2.4

I. Query ideas1. To determine the problem of slow database query, you can use the following statement, you can list the average time of the query statement, the total time, the CPU time used and other information? 12345678910111213141516

One, Operation folder (operation to the library):　　IncreaseCreate Database db1 charset UTF8;Check# View the database you are currently creating show CREATE Database db1;# view all databases show databases;ChangeALTER DATABASE DB1 CharSet GBK;By

1. MyISAM: The default table type, which is based on the traditional ISAM type, ISAM is an abbreviation for indexed sequential access method (indexed sequential access methods), which is the standard way to store records and files. It is not