Is there a maximum limit for mysql under linux?

MySQL under Linux has maximum limitations, including: 1. The file system used by MySQL has limits on the size of a single file, so the size of the MySQL database is theoretically limited by the file system; 2. MyISAM The storage engine has limits on the maximum size of a single table; 3. The maximum number of connections MySQL allows to be opened at the same time is also limited by system resources; 4. MySQL uses threads to process client requests, but threads require certain memory resources, so The number of threads is also limited by system resources.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

The maximum limitations of the MySQL database under Linux mainly include the following aspects:

1. Maximum database size: The file system used by MySQL has a limit on the size of a single file. limit. For example, in an ext4 file system, the maximum size of a single file is typically 16 TB, so the size of a MySQL database is theoretically limited by the file system.

2. Maximum table size: The MyISAM storage engine has a limit on the maximum size of a single table, usually 4 GB or less. However, tables using the InnoDB storage engine do not have this limitation and can support very large tables.

3. Maximum number of connections: The maximum number of connections MySQL allows to be opened at the same time. This limit can be set via the max_connections parameter in the configuration file and is also limited by system resources.

4. Maximum number of concurrent threads: MySQL uses threads to process client requests. The maximum number of threads that exist at the same time can be set through the max_connections parameter. Each thread requires certain memory resources, so the number of threads is also limited by system resources.

It should be noted that these restrictions can be modified by adjusting the MySQL configuration file to suit specific needs and system resources. However, before adjusting these limits, it is important to understand the health of your system resources and assess your application's needs to avoid resource shortages or performance issues.

In addition, please note that the operating system itself may have certain restrictions on MySQL. For example, the operating system's maximum number of file descriptors, thread limit, etc. will also affect the performance and availability of MySQL. Therefore, before adjusting MySQL limits, consider operating system limits as well.

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