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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-file-instances-table.html
The file_instances table lists all the files seen by the Performance Schema when executing file I/O instrumentation. When a file is deleted from the disk, it is also removed from the file_instances table. If a file on disk has never been opened, it ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-rwlock-instances-table.html
The rwlock_instances table lists all the rwlock (read write lock) instances seen by the Performance Schema while the server executes. The rwlock_instances table has these columns: NAME The instrument name associated with the lock. An rwlock is a ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-tables-with-full-table-scans.html
These views display which tables are being accessed with full table scans. The schema_tables_with_full_table_scans and x$schema_tables_with_full_table_scans views have these columns: object_schema The schema name. rows_full_scanned The total number ...
https://dev.mysql.com/doc/refman/5.7/en/replication-solutions-diffengines.html
Instead, use ALTER TABLE to change the table types after the replica has been started. Start the replication process again: mysql> START SLAVE; Although the default_storage_engine variable is not replicated, be aware that CREATE TABLE and ALTER ...
https://dev.mysql.com/doc/refman/5.7/en/known-issues.html
If you use ALTER TABLE to add a UNIQUE index to a table used in a MERGE table and then add a normal index on the MERGE table, the key order is different for the tables if there was an old, non-UNIQUE key in the table. This is because ALTER TABLE ...
https://dev.mysql.com/doc/refman/5.7/en/replace.html
When modifying an existing table that is not partitioned to accommodate partitioning, or, when modifying the partitioning of an already partitioned table, you may consider altering the table's primary key (see Section 22.6.1, “Partitioning Keys, ...REPLACE works exactly like INSERT, except that if an old row in the table has the same value as a new row for a PRIMARY KEY or a UNIQUE index, the old row is deleted before the new row is ...
https://dev.mysql.com/doc/refman/5.7/en/create-view.html
(Selecting from the view selects, in effect, using the SELECT statement.) The select_statement can select from base tables or from other views. The view definition is “frozen” at creation time and is not affected by subsequent changes to the ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-select-all.html
ndb_select_all prints all rows from an NDB table to stdout. Usage ndb_select_all -c connection_string tbl_name -d db_name [> file_name] Options that can be used with ndb_select_all are shown in the following table. --database=dbname, -d dbname Name ...--connect-retries Command-Line Format --connect-retries=# Type Integer Default Value 12 Minimum Value 0 Maximum Value 12 Number of times to retry connection before giving ...
https://dev.mysql.com/doc/refman/5.7/en/full-table.html
If a table-full error occurs, it may be that the disk is full or that the table has reached its maximum size. The effective maximum table size for MySQL databases is usually determined by operating system constraints on file sizes, not by MySQL ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-mysql-firewall-users-table.html
The MYSQL_FIREWALL_USERS table provides a view into the in-memory data cache for MySQL Enterprise Firewall. It is used in conjunction with the mysql.firewall_users system table that provides persistent storage of firewall data; see MySQL Enterprise ...It lists names and operational modes of registered firewall account ...