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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-ndb-cluster-tables.html
Table 29.3 Performance Schema NDB Tables Table Name Description ndb_sync_excluded_objects NDB objects which cannot be synchronized ndb_sync_pending_objects NDB objects waiting for synchronization Beginning with NDB 8.0.16, automatic synchronization ... The following table shows all Performance Schema tables relating to the NDBCLUSTER storage ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-status-monitoring.html
For example, if a mutex is instrumented in the server source but the server cannot allocate memory for the instrumentation at runtime, it increments Performance_schema_mutex_classes_lost. Other mutexes have an instance per connection, or per page in ...Names for these variables have several forms: Performance_schema_xxx_classes_lost indicates how many instruments of type xxx could not be ...
https://dev.mysql.com/doc/refman/8.0/en/precision-math.html
For example, MySQL treats a number such as .0001 as an exact value rather than as an approximation, and summing it 10,000 times produces a result of exactly 1, not a value that is merely “close” to 1. MySQL provides support for precision math: ...Precision math is based on these two features: SQL modes that control how strict the server is about accepting or rejecting invalid ...
https://dev.mysql.com/doc/refman/8.0/en/replication-binlog-encryption-key-rotation.html
When binary log encryption is enabled, you can rotate the binary log master key at any time while the server is running by issuing ALTER INSTANCE ROTATE BINLOG MASTER KEY. When you rotate the binary log master key manually, MySQL Server takes the ...You can rotate the binary log master key on a regular basis to comply with your organization's security policy, and also if you suspect that the current or any of the previous binary log master keys might have been ...
https://dev.mysql.com/doc/refman/8.0/en/replication-mode-change-online-disable-gtids.html
Before you start, ensure that the servers meet the following pre-conditions: All servers in your topology must use MySQL 5.7.6 or later. If you use binary logs for anything other than replication—for example, to perform point-in-time backup or ...
https://dev.mysql.com/doc/refman/8.0/en/session-state-tracking.html
The tracker mechanism provides a means for MySQL connectors and client applications to determine whether any session context is available to permit session migration from one server to another. Notification occurs in the MySQL client/server ...A ...
https://dev.mysql.com/doc/refman/8.0/en/stop-replica.html
You can control how long STOP REPLICA waits before timing out by setting the system variable rpl_stop_replica_timeout (from MySQL 8.0.26) or rpl_stop_slave_timeout (before MySQL 8.0.26). From MySQL 8.0.22, use STOP REPLICA in place of STOP SLAVE, ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-responses-failure-rejoin.html
The group_replication_autorejoin_tries system variable, which is available from MySQL 8.0.16, makes a member that has been expelled or reached its unreachable majority timeout try to rejoin the group automatically. Up to MySQL 8.0.20, the value of ...When auto-rejoin is not activated, a member accepts its expulsion as soon as it resumes communication, and proceeds to the action specified by the group_replication_exit_state_action system ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-statement-tables.html
For additional information about configuring event collection, see Section 29.3, “Performance Schema Startup Configuration”, and Section 29.4, “Performance Schema Runtime Configuration”. Typically, this means from the time the server gets ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-wait-tables.html
The Performance Schema instruments waits, which are events that take time. For additional information about configuring event collection, see Section 29.3, “Performance Schema Startup Configuration”, and Section 29.4, “Performance Schema ...