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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpudata-50ms.html
The cpudata_50ms table provides data about CPU usage per 50-millisecond interval over the last second.
https://dev.mysql.com/doc/refman/8.0/en/charset-connection.html
With the mysql client, to use a character set different from the default, you could explicitly execute a SET NAMES statement every time you connect to the server (see Client Program Connection Character Set Configuration). For example, the following ...These session system variable values are initialized at connect time, but can be changed within the ... A “connection” is what a client ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpudata.html
The cpudata table provides data about CPU usage during the last second.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-transporter-details.html
sendbuffer_max_used_bytes The maximum amount, in bytes, of signal data awaiting send at any one time by this transporter. sendbuffer_max_alloc_bytes Maxmimum amount of send buffer, in bytes, allocated for signal data storage at any one time for this ... This table contains information about individual NDB transporters, rather than aggregate information as shown by the transporters ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-locks-per-fragment.html
This table also shows the total time spent waiting for locks successfully and unsuccessfully since fragment or table creation, or since the most recent restart. This is also true for the time values shown in the wait_ok_millis and wait_fail_millis ... The locks_per_fragment table provides information about counts of lock claim requests, and the outcomes of these requests on a per-fragment basis, serving as a companion table to operations_per_fragment and ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-shm-definition.html
For optimum performance, you can define a spin time for the SHM transporter (ShmSpinTime parameter); this affects both the data node receiver thread and the poll owner (receive thread or user thread) in NDB. ShmSpinTime Version (or later) NDB 8.0.13 ... Communications between NDB cluster nodes are normally handled using ...
https://dev.mysql.com/doc/refman/8.0/en/keyring-functions-general-purpose.html
MySQL Server supports a keyring service that enables internal components and plugins to store sensitive information securely for later retrieval. MySQL Server also includes an SQL interface for keyring key management, implemented as a set of ...The ...
https://dev.mysql.com/doc/refman/8.0/en/replication-upgrade.html
For general information and instructions for upgrading a MySQL Server instance, see Chapter 3, Upgrading MySQL. As explained in Section 19.5.2, “Replication Compatibility Between MySQL Versions”, MySQL supports replication from a source running ... When you upgrade servers that participate in a replication topology, you need to take into account each server's role in the topology and look out for issues specific to ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-backup-concepts.html
A backup is a snapshot of the database at a given time. The data actually stored in the database tables at the time that the backup was made Transaction log. A sequential record telling how and when data was stored in the database Each of these ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-diskstat.html
The diskstat table provides information about writes to Disk Data tablespaces during the past 1 second.