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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-select-count.html
ndb_select_count prints the number of rows in one or more NDB tables. With a single table, the result is equivalent to that obtained by using the MySQL statement SELECT COUNT(*) FROM tbl_name. Usage ndb_select_count [-c connection_string] -ddb_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/compressed-format.html
Compressed tables have the following characteristics: Compressed tables take very little disk space. The header for a row takes up one to three bytes depending on the biggest row in the table. Note While a compressed table is read only, and you ...
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/mysql-cluster-ndbinfo-cluster-locks.html
The cluster_locks table provides information about current lock requests holding and waiting for locks on NDB tables in an NDB Cluster, and is intended as a companion table to cluster_operations. Information obtain from the cluster_locks table may ...The transaction ID (transid column) is the identifier generated by the NDB API for the transaction requesting or holding the current ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-transporters.html
This information is shown in the table's status column, which can have any one of the following values: CONNECTING, CONNECTED, DISCONNECTING, or DISCONNECTED. Rows where the node_id is that of a data node which is not currently connected are not ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-delete-all.html
In some cases, this can be much faster than DELETE or even TRUNCATE TABLE. Usage ndb_delete_all -c connection_string tbl_name -d db_name This deletes all rows from the table named tbl_name in the database named db_name. Options that can be used with ...--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/innodb-information-schema.html
This section provides information and usage examples for InnoDB INFORMATION_SCHEMA tables. InnoDB INFORMATION_SCHEMA tables provide metadata, status information, and statistics about various aspects of the InnoDB storage engine. You can view a list ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-dict-obj-info.html
The dict_obj_info table provides information about NDB data dictionary (DICT) objects such as tables and indexes. (The dict_obj_types table can be queried for a list of all the types.) This information includes the object's type, state, parent ...
https://dev.mysql.com/doc/refman/5.7/en/sys-statements-with-full-table-scans.html
These views display normalized statements that have done full table scans. The statements_with_full_table_scans and x$statements_with_full_table_scans views have these columns: query The normalized statement string. no_index_used_count The total ...
https://dev.mysql.com/doc/refman/5.7/en/sys-statements-with-temp-tables.html
These views list normalized statements that have used temporary tables. By default, rows are sorted by descending number of on-disk temporary tables used and descending number of in-memory temporary tables used. The statements_with_temp_tables and ...db The default database for the statement, or NULL if there is ...