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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. With auto-rejoin, when the ...Up ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-understanding-consistency-guarantees.html
With the first approach, the group takes the minimum time possible to secure a stable group membership after a primary failure by electing a new primary and then allowing data access immediately while it is still applying any possible backlog from ... In terms of distributed consistency guarantees, either in normal or failure repair operations, Group Replication has always been an eventual consistency ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-buffer-pool-stats-table.html
PAGES_MADE_YOUNG_RATE The number of pages made young per second (pages made young since the last printout / time elapsed). PAGES_MADE_NOT_YOUNG_RATE The number of pages not made per second (pages not made young since the last printout / time ... The ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression-internals.html
Every time something inside a block is modified, the whole block is recompressed before it is written to disk. It is important to minimize the number of times B-tree nodes are split, as well as to minimize the need to uncompress and recompress their ... This section describes some internal implementation details about compression for InnoDB ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-persistent-stats.html
The persistent optimizer statistics feature improves plan stability by storing statistics to disk and making them persistent across server restarts so that the optimizer is more likely to make consistent choices each time for a given query. You ...
https://dev.mysql.com/doc/refman/8.0/en/internal-locking.html
At times, it may be more efficient to disable deadlock detection and rely on the innodb_lock_wait_timeout setting for transaction rollback when a deadlock occurs. Table-Level Locking MySQL uses table-level locking for MyISAM, MEMORY, and MERGE ...
https://dev.mysql.com/doc/refman/8.0/en/json.html
BLOB BIT OPAQUE DATETIME TIME DATE BOOLEAN ARRAY OBJECT STRING INTEGER, DOUBLE NULL For JSON values of the same precedence, the comparison rules are type specific: BLOB The first N bytes of the two values are compared, where N is the number of bytes ...The JSON data type provides these advantages over storing JSON-format strings in a string column: Automatic validation of JSON documents stored in JSON ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpudata-1sec.html
The cpudata_1sec table provides data about CPU usage per second over the last 20 seconds.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpudata-20sec.html
The cpudata_20sec table provides data about CPU usage per 20-second interval over the last 400 seconds.
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.