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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-restart-info.html
Each entry in the table corresponds to a node restart status report in real time from a data node with the given node ID. The restart_info table contains the following columns: node_id Node ID in the cluster node_restart_status Node status; see text ...Only the most recent report for any given node is ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/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/8.0/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/8.0/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/8.0/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/8.0/en/precision-math-examples.html
Consider these statements: mysql> CREATE TABLE t (i INT, d DECIMAL, f FLOAT); mysql> INSERT INTO t VALUES(1,1,1); mysql> CREATE TABLE y SELECT AVG(i), AVG(d), AVG(f) FROM t; The result is a double only for the floating-point argument. This section ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-move-data.html
Usage The program is invoked with the names of the source and target tables; either or both of these may be qualified optionally with the database name. ndb_move_data options source target Options that can be used with ndb_move_data are shown in the ...--connect-retry-delay Command-Line Format --connect-retry-delay=# Type Integer Default Value 5 Minimum Value 0 Maximum Value 5 Number of seconds to wait between attempts to contact management ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-indexes.html
Without an index, MySQL must begin with the first row and then read through the entire table to find the relevant rows. If the table has an index for the columns in question, MySQL can quickly determine the position to seek to in the middle of the ... Indexes are used to find rows with specific column values ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-flush.html
Some forms of the FLUSH statement are not logged because they could cause problems if replicated to a replica: FLUSH LOGS and FLUSH TABLES WITH READ LOCK. The FLUSH TABLES, ANALYZE TABLE, OPTIMIZE TABLE, and REPAIR TABLE statements are written to ...These statements are written to the binary log unless you specify NO_WRITE_TO_BINLOG or its alias ...