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https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-ndbinfo-pgman-time-track-stats.html
This table provides information regarding the latency of disk operations for NDB Cluster Disk Data tablespaces. The size of the page read to or written from a Disk Data tablespace is always 32 KB. Log wait latency (log_waits column) is the length ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-online-add-node-remarks.html
This section provides general information about the behavior of and current limitations in adding NDB Cluster nodes online. The ability to add new nodes online includes a means to reorganize NDBCLUSTER table data and indexes so that they are ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-programs-ndbmtd.html
ndbmtd is a multithreaded version of ndbd, the process that is used to handle all the data in tables using the NDBCLUSTER storage engine. ndbmtd is intended for use on host computers having multiple CPU cores. Command-line options and configuration ...
https://dev.mysql.com/doc/refman/9.7/en/obtaining-component-information.html
The mysql.component system table contains information about currently loaded components and shows which components have been registered using INSTALL COMPONENT. For example: mysql> SELECT * FROM mysql.component; ...
https://dev.mysql.com/doc/refman/9.7/en/obtaining-loadable-function-information.html
The Performance Schema user_defined_functions table contains information about the currently installed loadable functions: SELECT * FROM performance_schema.user_defined_functions; The mysql.func system table also lists installed loadable functions, ...The user_defined_functions table lists loadable functions installed using CREATE FUNCTION as well as loadable functions installed automatically by components or ...
https://dev.mysql.com/doc/refman/9.7/en/opengis-geometry-model.html
In this model, each geometric object has the following general properties: It is associated with a spatial reference system, which describes the coordinate space in which the object is defined. The set of geometry types proposed by OGC's SQL with ...
https://dev.mysql.com/doc/refman/9.7/en/optimize-benchmarking.html
To measure performance, consider the following factors: Whether you are measuring the speed of a single operation on a quiet system, or how a set of operations (a “workload”) works over a period of time. With simple tests, you usually test how ...
https://dev.mysql.com/doc/refman/9.7/en/other-vendor-data-types.html
These mappings make it easier to import table definitions from other database systems into MySQL. To facilitate the use of code written for SQL implementations from other vendors, MySQL maps data types as shown in the following table. If you create ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-handling-nulls.html
We can verify this behavior by examining the effects on the file system of creating a table partitioned by HASH and populating it with a record containing appropriate values. Partitioning in MySQL does nothing to disallow NULL as the value of a ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-firewall-group-allowlist-table.html
It is used in conjunction with the mysql.firewall_group_allowlist system table that provides persistent storage of firewall data; see MySQL Enterprise Firewall Tables. The firewall_group_allowlist table provides a view into the in-memory data cache ...