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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-tc-time-track-stats.html
The tc_time_track_stats table provides time-tracking information obtained from the DBTC block (TC) instances in the data nodes, through API nodes access NDB. index_key_ops Based on duration of successful unique index key operations, tracked against ...Each TC instance tracks latencies for a set of activities it undertakes on behalf of API nodes or other data nodes; these activities include transactions, transaction errors, key reads, key writes, unique index operations, failed key operations of any type, scans, failed scans, fragment scans, and failed fragment ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-threadblocks.html
The threadblocks table associates data nodes, threads, and instances of NDB kernel blocks. The threadblocks table contains the following columns: node_id Node ID thr_no Thread ID block_name Block name block_instance Block instance number Notes The ...Although the list of possible values is static for a given NDB Cluster release, the list may vary between ...
https://dev.mysql.com/doc/refman/5.7/en/mysqldump-definition-data-dumps.html
The --no-data option tells mysqldump not to dump table data, resulting in the dump file containing only statements to create the tables. Conversely, the --no-create-info option tells mysqldump to suppress CREATE statements from the output, so that ...
https://dev.mysql.com/doc/refman/5.7/en/replication-features-blackhole.html
When performing binary logging, all inserts to such tables are always logged, regardless of the logging format in use. With the statement based logging format, all statements affecting BLACKHOLE tables are logged, but their effects ignored. When ...
https://dev.mysql.com/doc/refman/5.7/en/sys-extract-table-from-file-name.html
Given a file path name, returns the path component that represents the table name. It provides a convenient way to display table names, which can be more easily understood than full path names, and can be used in joins against object table names.
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-truncate-all-tables.html
Truncates all Performance Schema summary tables, resetting all aggregated instrumentation as a snapshot. Parameters in_verbose BOOLEAN: Whether to display each TRUNCATE TABLE statement before executing it. Example mysql> CALL ...
https://dev.mysql.com/doc/refman/5.7/en/all-subqueries.html
The expression is TRUE if table t2 contains (-5,0,+5) because 10 is greater than all three values in t2. The expression is FALSE if table t2 contains (12,6,NULL,-100) because there is a single value 12 in table t2 that is greater than 10. The ...
https://dev.mysql.com/doc/refman/5.7/en/binary-log.html
The binary log contains “events” that describe database changes such as table creation operations or changes to table data. Updates to nontransactional tables are stored in the binary log immediately after execution. Within an uncommitted ...It ...
https://dev.mysql.com/doc/refman/5.7/en/creating-accounts.html
Account-management statements cause the server to make appropriate modifications to the underlying grant tables, which are discussed in Section 6.2.3, “Grant Tables”. Note Direct modification of grant tables using statements such as INSERT, ...
https://dev.mysql.com/doc/refman/5.7/en/enum.html
An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation time. (The practical limit is less than 3000.) A table can have no more than 255 unique ...