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https://dev.mysql.com/doc/refman/5.7/en/information-schema-profiling-table.html
Its contents correspond to the information produced by the SHOW PROFILE and SHOW PROFILES statements (see Section 13.7.5.30, “SHOW PROFILE Statement”). The table is empty unless the profiling session variable is set to 1. Note This table is ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-schemata-table.html
Caution Because a global privilege is considered a privilege for all databases, any global privilege enables a user to see all database names with SHOW DATABASES or by examining the INFORMATION_SCHEMA SCHEMATA table. A schema is a database, so the ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-checkpoints.html
There is no need to flush the buffer pool in one single batch, which would disrupt processing of user SQL statements during the checkpointing process. Making your log files very large may reduce disk I/O during checkpointing. It often makes sense ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-examples.html
Identifying Blocking Transactions It is sometimes helpful to identify which transaction blocks another. The tables that contain information about InnoDB transactions and data locks enable you to determine which transaction is waiting for another, ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-files-table.html
The Information Schema FILES table provides metadata about all InnoDB tablespace types including file-per-table tablespaces, general tablespaces, the system tablespace, temporary table tablespaces, and undo tablespaces (if present). Note The ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached.html
The combination of memcached simplicity and InnoDB reliability and consistency provides users with the best of both worlds, as explained in Section 14.21.1, “Benefits of the InnoDB memcached Plugin”. The InnoDB memcached plugin ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-performance-schema.html
This type of tuning is primarily for expert users who evaluate optimization strategies to overcome performance bottlenecks. This section provides a brief introduction to InnoDB integration with Performance Schema. For comprehensive Performance ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-transaction-model.html
Typically, several users are permitted to lock every row in InnoDB tables, or any random subset of the rows, without causing InnoDB memory exhaustion. The InnoDB transaction model aims combine the best properties of a multi-versioning database with ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-turning-off.html
Oracle recommends InnoDB as the preferred storage engine for typical database applications, from single-user wikis and blogs running on a local system, to high-end applications pushing the limits of performance. In MySQL 5.7, InnoDB is the default ...
https://dev.mysql.com/doc/refman/5.7/en/language-structure.html
This chapter discusses the rules for writing the following elements of SQL statements when using MySQL: Literal values such as strings and numbers Identifiers such as database, table, and column names Keywords and reserved words User-defined and ...