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https://dev.mysql.com/doc/refman/8.0/en/error-log-event-fields.html
If this happens, the field cannot be found by subsequent processing within that filter and by components that execute after the filter (such as log sinks). When present, an optional field provides additional event information as appropriate and ...
https://dev.mysql.com/doc/refman/8.0/en/external-locking.html
If the server is run with external locking enabled, you can use myisamchk at any time for read operations such a checking tables. In this case, if the server tries to update a table that myisamchk is using, the server waits for myisamchk to finish ... External locking is the use of file system locking to manage contention for MyISAM database tables by multiple ...
https://dev.mysql.com/doc/refman/8.0/en/firewall-installation.html
MySQL Enterprise Firewall installation is a one-time operation that installs the elements described in Section 8.4.7.1, “Elements of MySQL Enterprise Firewall”. Installing MySQL Enterprise Firewall Uninstalling MySQL Enterprise Firewall ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-flow-control.html
MySQL Group Replication ensures that a transaction commits only after a majority of the members in a group have received it and agreed on the relative order amongst all transactions sent concurrently. If it does, and some members have less write ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-buffer-page-table.html
For related usage information and examples, see Section 17.15.5, “InnoDB INFORMATION_SCHEMA Buffer Pool Tables”. Do not query this table on a production system unless you are aware of the performance impact and have determined it to be ... The ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-file-defragmenting.html
Random insertions into or deletions from a secondary index can cause the index to become fragmented. All InnoDB data and indexes are stored in B-trees, and their fill factor may vary from 50% to 100%. Another symptom of fragmentation is that a ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-optimize-tablespace-page-allocation.html
When pages are allocated using posix_fallocate() calls, the extension size is small by default and pages are often allocated only a few at a time, which can cause fragmentation and increase random I/O. As of MySQL 8.0.22, you can optimize how ...
https://dev.mysql.com/doc/refman/8.0/en/myisamlog.html
If a recovery is done (-r), all writes and possibly updates and deletes are done and errors are only counted. If tables are named on the command line, only those tables are updated. This option can be given multiple times to produce more and more ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-config-send-buffers.html
This parameter can be set for all types of NDB Cluster nodes—that is, it can be set in the [ndbd], [mgm], and [api] (or [mysql]) sections of the config.ini file. This parameter is used in the config.ini file [tcp] section, and denotes the amount ... The NDB kernel employs a unified send buffer whose memory is allocated dynamically from a pool shared by all ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-params-other.html
The listings in this section provide information about parameters used in the [computer], [tcp], and [shm] sections of a config.ini file for configuring NDB Cluster. For detailed descriptions and additional information about individual parameters, ...The following parameters apply to the config.ini file's [computer] section: HostName: Host name or IP address of this ...