PDF (US Ltr)
- 43.3Mb
PDF (A4)
- 43.4Mb
Man Pages (TGZ)
- 297.2Kb
Man Pages (Zip)
- 402.4Kb
Info (Gzip)
- 4.3Mb
Info (Zip)
- 4.3Mb
Search Results
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-wait-summary-tables.html
If an instrument is used to create multiple instances, each instance has a unique OBJECT_INSTANCE_BEGIN value and is summarized separately in this table. The Performance Schema maintains tables for collecting current and recent wait events, and ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-online-add-node-example.html
ALGORITHM=INPLACE, REORGANIZE PARTITION does not work on tables that were created with the MAX_ROWS option. REORGANIZE PARTITION statements for NDBCLUSTER tables created after the new data nodes have been added; data added to such tables is ...You ... In this section we provide a detailed example illustrating how to add new NDB Cluster data nodes online, starting with an NDB Cluster having 2 data nodes in a single node group and concluding with a cluster having 4 data nodes in 2 node ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-introduction.html
If you wish to make such information hidden from queries that select from these tables, you can do so by setting the value of the show_gipk_in_create_table_and_information_schema server system variable to OFF. INFORMATION_SCHEMA provides access to ...Other terms that are sometimes used for this information are data dictionary and system ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-temptables.html
In statement-based replication mode, CREATE TEMPORARY TABLE and DROP TEMPORARY TABLE statements cannot be used inside a transaction, procedure, function, or trigger when GTIDs are in use on the server (that is, when the enforce_gtid_consistency ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-truncate-table-reclaim-space.html
For a table to be stored in its own .ibd file, innodb_file_per_table must enabled when the table is created. When a table is truncated, it is dropped and re-created in a new .ibd file, and the freed space is returned to the operating system. This is ... To reclaim operating system disk space when truncating an InnoDB table, the table must be stored in its own .ibd ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-buffer-page-table.html
The INNODB_BUFFER_PAGE table provides information about each page in the InnoDB buffer pool. For related usage information and examples, see Section 17.15.5, “InnoDB INFORMATION_SCHEMA Buffer Pool Tables”. Do not query this table on a ...To ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-status-variable-tables.html
Status variable information is available in these Performance Schema tables: global_status: Global status variables. An application that wants only global values should use this table. An application that wants all status variable values for its own ... The MySQL server maintains many status variables that provide information about its operation (see Section 7.1.10, “Server Status ...
https://dev.mysql.com/doc/refman/8.0/en/load-data.html
If you use LOAD DATA on an empty MyISAM table, all nonunique indexes are created in a separate batch (as for REPAIR TABLE). In some extreme cases, you can create the indexes even faster by turning them off with ALTER TABLE ... DISABLE KEYS before ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-upgrade.html
Each time you upgrade MySQL, you should execute mysql_upgrade, which looks for incompatibilities with the upgraded MySQL server: It upgrades the system tables in the mysql schema so that you can take advantage of new privileges or capabilities that ... Note As of MySQL 8.0.16, the MySQL server performs the upgrade tasks previously handled by mysql_upgrade (for details, see Section 3.4, “What the MySQL Upgrade Process ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-config-table.html
use_stopword: Indicates whether a stopword table is used, which is defined when the FULLTEXT index is created. The INNODB_FT_CONFIG table provides metadata about the FULLTEXT index and associated processing for an InnoDB table. Before querying it, ...The values for this column might change, depending on the needs for performance tuning and debugging for InnoDB full-text ...