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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-config-send-buffers.html
This means that the size of the send buffer can be adjusted as necessary. To be backward-compatible with existing configurations, this parameter takes as its default value the sum of the maximum send buffer sizes of all configured transporters, plus ... The NDB kernel employs a unified send buffer whose memory is allocated dynamically from a pool shared by all ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-files.html
The files table is empty if no disk data objects have been created in NDB. See Section 25.6.11.1, “NDB Cluster Disk Data Objects”, for more information.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-params-api.html
DefaultHashMapSize: Set size (in buckets) to use for table hash maps. The listing in this section provides information about parameters used in the [mysqld] and [api] sections of a config.ini file for configuring NDB Cluster SQL nodes and API nodes. For detailed descriptions and other additional information about each of these parameters, see Section 25.4.3.7, “Defining SQL and Other API Nodes in an NDB ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-shm-definition.html
(NDB 8.0.13) Size (in bytes) of the shared memory buffer for signals sent from this node using a shared memory connection. ShmSize Version (or later) NDB 8.0.13 Type or units bytes Default 4M Range 64K - 4294967039 (0xFFFFFEFF) Restart Type Node ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-memory-model.html
The buffer size is unbounded, and may grow with the load. As the Performance Schema collects data, memory is allocated in the corresponding buffer, until the buffer size reaches N. Once the buffer size reaches N, no more memory is allocated. Memory ...
https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html
If you use an aggregate function in a statement containing no GROUP BY clause, it is equivalent to grouping on all rows. In MySQL 8.0, bit functions and operators permit binary string type arguments (BINARY, VARBINARY, and the BLOB types) and return ... This section describes aggregate functions that operate on sets of ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-event-tables.html
The _current table for each event type contains one row per thread, so there is no system variable for configuring its maximum size. Typical autosized values are 10 rows per thread for _history tables, and 10,000 rows total for _history_long tables.
https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-concepts.html
A row in this table contains, for each GTID or set of GTIDs that it represents, the UUID of the originating server, and the starting and ending transaction IDs of the set; for a row referencing only a single GTID, these last two values are the same.
https://dev.mysql.com/doc/refman/8.0/en/cursor-restrictions.html
One limitation of the implementation is that for a large result set, retrieving its rows through a cursor might be slow. A server-side cursor enables a result set to be generated on the server side, but not transferred to the client except for those ... Server-side cursors are implemented in the C API using the mysql_stmt_attr_set() ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-storage-layout.html
Once your data reaches a stable size, or a growing table has increased by tens or some hundreds of megabytes, consider using the OPTIMIZE TABLE statement to reorganize the table and compact any wasted space. This operation can be slow if the table ...The reorganized tables require less disk I/O to perform full table ...