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https://dev.mysql.com/doc/refman/8.0/en/index-condition-pushdown-optimization.html
Index Condition Pushdown (ICP) is an optimization for the case where MySQL retrieves rows from a table using an index. Without ICP, the storage engine traverses the index to locate rows in the base table and returns them to the MySQL server which ...With ICP enabled, and if parts of the WHERE condition can be evaluated by using only columns from the index, the MySQL server pushes this part of the WHERE condition down to the storage ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-troubleshoot.html
loose-daemon_memcached_option='-c 64' To troubleshoot problems where the memcached daemon is unable to store or retrieve InnoDB table data, encode the -vvv memcached option in the daemon_memcached_option configuration parameter in the MySQL ... This ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-limits.html
Memory consumed when data is inserted into an NDB table is not automatically recovered when deleted, as it is with other storage engines. Instead, the following rules hold true: A DELETE statement on an NDB table makes the memory formerly used by ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-replication-group-members.html
The performance_schema.replication_group_members table is used for monitoring the status of the different server instances that are members of the group. The information in the table is updated whenever there is a view change, for example when the ...At that point, servers exchange some of their metadata to synchronize themselves and continue to cooperate ...
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.
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-cpuinfo.html
The cpuinfo table provides information about the CPU on which a given data node executes. The cpuinfo table contains the following columns: node_id Node ID cpu_no CPU ID cpu_online 1 if the CPU is online, otherwise 0 core_id CPU core ID socket_id ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-hwinfo.html
The hwinfo table provides information about the hardware on which a given data node executes.