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MySQL 8.3 Reference Manual  /  ...  /  Disadvantages of Creating Many Tables in the Same Database

10.4.3.2 在同一个数据库中创建许多表的缺点

如果您在同一个数据库目录中有许多 MyISAM 表，则打开、关闭和创建操作将变慢。如果您在许多不同的表上执行 SELECT 语句，当表缓存满时，会产生一些开销，因为每打开一个表，另一个表必须关闭。您可以通过增加表缓存中的条目数来减少这种开销。


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Related Documentation
MySQL 8.3 Release Notes
Download this Manual
PDF (US Ltr) - 40.8Mb
PDF (A4) - 40.9Mb
Man Pages (TGZ) - 294.0Kb
Man Pages (Zip) - 409.0Kb
Info (Gzip) - 4.0Mb
Info (Zip) - 4.0Mb
Excerpts from this Manual
MySQL Backup and Recovery
MySQL NDB Cluster 8.3
MySQL Globalization
MySQL Information Schema
MySQL Installation Guide
MySQL and Linux/Unix
MySQL and macOS
MySQL Partitioning
MySQL Performance Schema
MySQL Replication
Using the MySQL Yum Repository
MySQL Restrictions and Limitations
Security in MySQL
MySQL and Solaris
Building MySQL from Source
Starting and Stopping MySQL
MySQL Tutorial
MySQL and Windows