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https://dev.mysql.com/doc/refman/8.0/en/fulltext-query-expansion.html
This is generally useful when a search phrase is too short, which often means that the user is relying on implied knowledge that the full-text search engine lacks. For example, a user searching for “database” may really mean that “MySQL”, ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-group-stats-table.html
A quickly increasing counter means that the priority system is not keeping transactions from starting too early. For InnoDB, this most likely means deteriorating performance due to too many concurrent transactions.. ROW_LOCK_WAITS The number of ...
https://dev.mysql.com/doc/refman/8.0/en/firewall-usage.html
If an application normally is used through that connector, train the firewall using the connector, too. If an application normally is used through that connector, train the firewall using the connector, too. Before using MySQL Enterprise Firewall, ...
https://dev.mysql.com/doc/refman/8.0/en/log-destinations.html
MySQL Server provides flexible control over the destination of output written to the general query log and the slow query log, if those logs are enabled. Possible destinations for log entries are log files or the general_log and slow_log tables in ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-key-cache.html
The key cache also is not used if the key_buffer_size value is too small to allocate the minimal number of block buffers (8). To control the size of the key cache, use the key_buffer_size system variable. Usually the size of an index block is equal ... To minimize disk I/O, the MyISAM storage engine exploits a strategy that is used by many database management ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-buffer-pool-flushing.html
Systems with consistent workloads, a large log file size (innodb_log_file_size), and small spikes that do not reach 75% log space utilization should use a high innodb_flushing_avg_loops value to keep flushing as smooth as possible. Conversely, if a ... InnoDB performs certain tasks in the background, including flushing of dirty pages from the buffer ...
https://dev.mysql.com/doc/refman/8.0/en/json-utility-functions.html
JSON_STORAGE_SIZE() and JSON_STORAGE_FREE() show, respectively, the amount of storage space used by a given JSON value and the amount of space remaining in a JSON column following a partial update. For a JSON column which has been updated such that ... This section documents utility functions that act on JSON values, or strings that can be parsed as JSON ...
https://dev.mysql.com/doc/refman/8.0/en/pluggable-authentication-system-variables.html
authentication_ldap_sasl_init_pool_size Command-Line Format --authentication-ldap-sasl-init-pool-size=# System Variable authentication_ldap_sasl_init_pool_size Scope Global Dynamic Yes SET_VAR Hint Applies No Type Integer Default Value 10 Minimum ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-option-tables.html
ndb-blob-read-batch-bytes: Specifies size in bytes that large BLOB reads should be batched into. ndb-blob-write-batch-bytes: Specifies size in bytes that large BLOB writes should be batched into. ndb-default-column-format: Use this value (FIXED or ... 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/refman/8.0/en/innodb-purge-configuration.html
If DML action is concentrated on a single table, purge operations for the table are performed by a single purge thread, which can result in slowed purge operations, increased purge lag, and increased tablespace file size if the DML operations ...It ...