Advantages of using partitions

Using partitioned tables has the following advantages ：

1) Equilibrium system I/O： You can balance by building different partitions of the table in different physical disk space I/O, Improve the system I/O
performance ;

2) Improve application query performance ： When querying a table , Only relevant partitions of interest are retrieved , To improve retrieval performance ;

3) Strong availability and maintainability ： If some partitions of the table are unavailable due to problems , Then other partition data will not be affected ; Delete by partition 、 transfer 、 export / Import 、 Analysis and other operations are more convenient 、 flexible , It can save a lot of time and system resources , Improve application performance .

When the table is larger than 2G Or when the table contains obvious historical data and new data , Consider using partition tables . In fact, at present, many large IT In the system , Especially for some telecom operators IT In the system , Partition tables are mostly used in regions 、 The scene of distinguishing months , Or for performance , Use HASH Partition by .