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https://dev.mysql.com/doc/refman/8.4/en/archive-storage-engine.html
The ARCHIVE storage engine produces special-purpose tables that store large amounts of unindexed data in a very small footprint. When you create an ARCHIVE table, the storage engine creates files with names that begin with the table name. The ...To ...
https://dev.mysql.com/doc/refman/8.4/en/bug-reports.html
If a database table is related to the problem, include the output from the SHOW CREATE TABLE db_name.tbl_name statement in the bug report. This is a very easy way to get the definition of any table in a database. You should also include the output ... Before posting a bug report about a problem, please try to verify that it is a bug and that it has not been reported already: Start by searching the MySQL online manual at ...
https://dev.mysql.com/doc/refman/8.4/en/condition-filtering.html
In join processing, prefix rows are those rows passed from one table in a join to the next. In general, the optimizer attempts to put tables with low prefix counts early in the join order to keep the number of row combinations from increasing ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/meb-files-backed-up-summary.html
The following table shows the different types of files that are included in a single-file backup image or a directory backup. Table 1.1 Types of Files in a Backup File Name, Pattern, or Extension Relation to Original Data Files Notes ibdata* The ...
https://dev.mysql.com/doc/refman/8.4/en/multiple-key-caches.html
This feature enables you to assign different table indexes to different key caches. Where there are multiple key caches, the server must know which cache to use when processing queries for a given MyISAM table. By default, all MyISAM table indexes ... Note As of MySQL 8.4, the compound-part structured-variable syntax discussed here for referring to multiple MyISAM key caches is ...
https://dev.mysql.com/doc/refman/8.4/en/error-log-rule-based-filtering.html
The log_filter_dragnet log filter component enables log filtering based on user-defined rules. To enable the log_filter_dragnet filter, first load the filter component, then modify the log_error_services value. The following example enables ...
https://dev.mysql.com/doc/refman/8.4/en/group-by-optimization.html
The most general way to satisfy a GROUP BY clause is to scan the whole table and create a new temporary table where all rows from each group are consecutive, and then use this temporary table to discover groups and apply aggregate functions (if ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/mem-agent-rights.html
MySQL Enterprise Monitor Agent requires a user configured within each MySQL instance that is being monitored with suitable privileges to collect information about the server, including variable names, replication, and storage engine status ...The ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-advisor-auto-query-time-estimation.html
To view the current MySQL HeatWave query history, query the performance_schema.rpd_query_stats table: mysql> SELECT query_id, LEFT(query_text,160) FROM performance_schema.rpd_query_stats; *************************** 1. row ... Auto Query Time ...
https://dev.mysql.com/doc/refman/8.4/en/myisam-crash-recovery.html
If your tables become corrupted frequently, you should try to find the reason why. For an explanation of how MyISAM tables can become corrupted, see Section 18.2.4, “MyISAM Table Problems”. If you run mysqld with external locking disabled (which ... This section describes how to check for and deal with data corruption in MySQL ...