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https://dev.mysql.com/doc/refman/8.0/en/create-table-files.html
For an InnoDB table created in a file-per-table tablespace or general tablespace, table data and associated indexes are stored in a .ibd file in the database directory. When an InnoDB table is created in the system tablespace, table data and ...The ...Thus, for each MyISAM table tbl_name, there are two disk ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-file-reading.html
If an audit_log_read() argument includes either item, it must include both to completely specify a position or an error occurs. The audit log plugin supports functions that provide an SQL interface for reading JSON-format audit log files. (This ...
https://dev.mysql.com/doc/refman/8.0/en/keyring-file-plugin.html
The keyring_file keyring plugin stores keyring data in a file local to the server host. Instead, consider using the component_keyring_file component for storing keyring data (see Section 8.4.4.4, “Using the component_keyring_file File-Based ...As ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-print-sys-file.html
Like ndb_print_backup_file and ndb_print_schema_file (and unlike most of the other NDB utilities that are intended to be run on a management server host or to connect to a management server) ndb_print_backup_file must be run on a cluster data node, ...Cluster system files are located in a data node's data directory (DataDir); the path under this directory to system files matches the pattern ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-files.html
The files table is empty if no disk data objects have been created in NDB. See Section 25.6.11.1, “NDB Cluster Disk Data Objects”, for more information.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-print-schema-file.html
Like ndb_print_backup_file and ndb_print_sys_file (and unlike most of the other NDB utilities that are intended to be run on a management server host or to connect to a management server) ndb_print_schema_file must be run on a cluster data node, ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-file-summary-tables.html
The Performance Schema maintains file I/O summary tables that aggregate information about I/O operations. Each file I/O summary table has one or more grouping columns to indicate how the table aggregates events. Event names refer to names of event ...Example file I/O event summary information: mysql> SELECT * FROM performance_schema.file_summary_by_event_name\G ...
https://dev.mysql.com/doc/refman/8.0/en/making-trace-files.html
The trace file can become very large! To generate a smaller trace file, you can use debugging options something like this: mysqld --debug=d,info,error,query,general,where:O,/tmp/mysqld.trace This only prints information with the most interesting ...
https://dev.mysql.com/doc/refman/8.0/en/file-permissions.html
For example, mysqld might issue the following error message when you create a table: ERROR: Can't find file: 'path/with/file_name' (Errcode: 13) The default UMASK and UMASK_DIR values are 0640 and 0750, respectively. If this is unsuitable, create ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-disk-management.html
Within these constraints, InnoDB tries to optimize the database work and the organization of disk files to minimize the amount of disk I/O. As a DBA, you must manage disk I/O to keep the I/O subsystem from becoming saturated, and manage disk space ...Enabling or disabling features that provide extra durability at the expense of additional ...