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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndb-api-statistics.html
A number of types of statistical counters relating to actions performed by or affecting Ndb objects are available. Such actions include starting and closing (or aborting) transactions; primary key and unique key operations; table, range, and pruned ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-diskpagebuffer.html
The diskpagebuffer table provides statistics about disk page buffer usage by NDB Cluster Disk Data tables. The diskpagebuffer table contains the following columns: node_id The data node ID block_instance Block instance pages_written Number of pages ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-option-tables.html
Ndb_pushed_queries_defined: Number of joins that API nodes have attempted to push down to data nodes. Ndb_pushed_queries_dropped: Number of joins that API nodes have tried to push down, but failed. Ndb_pushed_queries_executed: Number of joins ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-restore.html
The option checks before attempting to log whether all the tables being restored have explicitly defined primary keys; queries on a table having only the hidden primary key implemented by NDB cannot be converted to valid SQL. The NDB Cluster ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-size-pl.html
This is a Perl script that can be used to estimate the amount of space that would be required by a MySQL database if it were converted to use the NDBCLUSTER storage engine. Unlike the other utilities discussed in this section, it does not require ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-replication-schema.html
ndb_apply_status Table ndb_binlog_index Table ndb_replication Table Replication in NDB Cluster makes use of a number of dedicated tables in the mysql database on each MySQL Server instance acting as an SQL node in both the cluster being replicated ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-logging.html
The mysql client can do these types of logging for statements executed interactively: On Unix, mysql writes the statements to a history file. By default, this file is named .mysql_history in your home directory. To specify a different file, set the ...
https://dev.mysql.com/doc/refman/8.0/en/nested-loop-joins.html
MySQL executes joins between tables using a nested-loop algorithm or variations on it. Nested-Loop Join Algorithm Block Nested-Loop Join Algorithm Nested-Loop Join Algorithm A simple nested-loop join (NLJ) algorithm reads rows from the first table ...
https://dev.mysql.com/doc/refman/8.0/en/optimizer-issues.html
MySQL uses a cost-based optimizer to determine the best way to resolve a query. In many cases, MySQL can calculate the best possible query plan, but sometimes MySQL does not have enough information about the data at hand and has to make ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-memory-tables.html
For best performance with MEMORY tables, examine the kinds of queries against each table, and specify the type to use for each associated index, either a B-tree index or a hash index. B-tree indexes are fast for queries that do greater-than or ...