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https://dev.mysql.com/doc/refman/8.4/en/myisamchk.html
The myisamchk utility gets information about your database tables or checks, repairs, or optimizes them. myisamchk works with MyISAM tables (tables that have .MYD and .MYI files for storing data and indexes). You can also use the CHECK TABLE and ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-lakehouse-auto-loading-data-uri.html
As of MySQL 9.3.1, and only on MySQL HeatWave on OCI, you can use uniform resource identifiers (URI) to specify files for loading data when creating external tables. Review the following examples for different ways to create external tables. These ...To learn more, see Load Structured Data Using Lakehouse Auto Parallel ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-compression-tuning.html
However, because the efficiency of compression depends on the nature of your data, you can make decisions that affect the performance of compressed tables: Which tables to compress. If the system performs DML operations on compressed tables, and the ... Most often, the internal optimizations described in InnoDB Data Storage and Compression ensure that the system runs well with compressed ...
https://dev.mysql.com/doc/refman/8.4/en/with.html
A common table expression (CTE) is a named temporary result set that exists within the scope of a single statement and that can be referred to later within that statement, possibly multiple times. Common Table Expressions Recursive Common Table ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-parameters.html
Normal operations can continue while the hash table is emptied, and executing queries that were using the hash table access the index B-trees directly instead. When the adaptive hash index is re-enabled, the hash table is populated again during ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-compression-usage.html
Compressed tables can be created in file-per-table tablespaces or in general tablespaces. The system tablespace (space 0, the .ibdata files) can contain user-created tables, but it also contains internal system data, which is never compressed. You ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-memory-per-fragment.html
memory_per_fragment Table: Notes memory_per_fragment Table: Examples The memory_per_fragment table provides information about the usage of memory by individual fragments. See the Notes later in this section to see how you can use this to find out ...This is true as long as all data nodes are running and connected to the cluster; for a data node that is missing, there are no rows for the fragment replicas that it ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-option-tables.html
ndb-default-column-format: Use this value (FIXED or DYNAMIC) by default for COLUMN_FORMAT and ROW_FORMAT options when creating or adding table columns. ndb-distribution: Default distribution for new tables in NDBCLUSTER (KEYHASH or LINHASH, default ... The following list includes command-line options, system variables, and status variables applicable within mysqld when it is running as an SQL node in an NDB ...
https://dev.mysql.com/doc/mysql-cluster-manager/8.4/en/mcm-attribute-tables-mysqld.html
ndb-default-column-format: Use this value (FIXED or DYNAMIC) by default for COLUMN_FORMAT and ROW_FORMAT options when creating or adding table columns. ndb-distribution: Default distribution for new tables in NDBCLUSTER (KEYHASH or LINHASH, default ...ndb-blob-read-batch-bytes: Specifies size in bytes that large BLOB reads should be batched ...
https://dev.mysql.com/doc/refman/8.4/en/create-table-gipks.html
MySQL 8.4 supports generated invisible primary keys for any InnoDB table that is created without an explicit primary key. When the sql_generate_invisible_primary_key server system variable is set to ON, the MySQL server automatically adds a ...By ...