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https://dev.mysql.com/doc/refman/8.0/en/sys-memory-global-by-current-bytes.html
The memory_global_by_current_bytes and x$memory_global_by_current_bytes views have these columns: event_name The memory event name. These views summarize memory use, grouped by allocation type (that is, by event). By default, rows are sorted by ...
https://dev.mysql.com/doc/refman/8.0/en/sys-memory-global-total.html
The memory_global_total and x$memory_global_total views have these columns: total_allocated The total bytes of memory allocated within the server.
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-tables.html
The following sections describe sys schema tables and triggers. ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-status-variables.html
Performance Schema status variables have the following meanings: Performance_schema_accounts_lost The number of times a row could not be added to the accounts table because it was full. Performance_schema_hosts_lost The number of times a row could ...Performance_schema_digest_lost The number of digest instances that could not be instrumented in the events_statements_summary_by_digest ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-group-stats-table.html
WAKE_THREAD_STALL_CHECKER The number of times the stall check thread decided to wake or create a thread to possibly handle some statements or take care of the waiter thread role. PRIO_KICKUPS The number of statements that have been moved from ...
https://dev.mysql.com/doc/refman/8.0/en/thread-pool-information-schema-tables.html
They provide information about thread pool operation: TP_THREAD_GROUP_STATE: Information about thread pool thread group states TP_THREAD_GROUP_STATS: Thread group statistics TP_THREAD_STATE: Information about thread pool thread states Rows in these ... Note As of MySQL 8.0.14, the INFORMATION_SCHEMA thread pool tables are also available as Performance Schema ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpustat-1sec.html
Like cpustat_50ms and cpustat_20sec, this table shows 20 measurement sets per thread, each referencing a period of the named duration. The cpustat-1sec table provides raw, per-thread CPU data obtained each second for each thread running in the NDB ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpustat-20sec.html
Like cpustat_50ms and cpustat_1sec, this table shows 20 measurement sets per thread, each referencing a period of the named duration. The cpustat_20sec table provides raw, per-thread CPU data obtained each 20 seconds, for each thread running in the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpustat-50ms.html
Like cpustat_1sec and cpustat_20sec, this table shows 20 measurement sets per thread, each referencing a period of the named duration. The cpustat_50ms table provides raw, per-thread CPU data obtained each 50 milliseconds for each thread running in ...
https://dev.mysql.com/doc/refman/8.0/en/dynamic-format.html
A row can become fragmented (stored in noncontiguous pieces) when it is made longer as a result of an update. If a string column has a length of zero after trailing space removal, or a numeric column has a value of zero, it is marked in the bitmap ... Dynamic storage format is used if a MyISAM table contains any variable-length columns (VARCHAR, VARBINARY, BLOB, or TEXT), or if the table was created with the ROW_FORMAT=DYNAMIC table ...