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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-security-networking-issues.html
Any traffic other than that shown in the table for a given node type should be denied. iptables is a very common and reliable firewall application, which is often used with APF as a front end to make configuration easier. In this section, we ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-shm-definition.html
See Section 25.4.3.14, “Configuring NDB Cluster Send Buffer Parameters”, and Section 25.6.16.65, “The ndbinfo transporters Table”, for more information. Communications between NDB cluster nodes are normally handled using TCP/IP. The shared ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-server-side-help.html
The proper operation of this command requires that the help tables in the mysql database be initialized with help topic information (see Section 7.1.17, “Server-Side Help Support”). To make a more specific request, please type 'help <item>', ...
https://dev.mysql.com/doc/refman/8.0/en/mysqld-safe.html
mysqld_safe accepts options on the command line and in option files, as described in the following table. mysqld_safe is the recommended way to start a mysqld server on Unix. mysqld_safe adds some safety features such as restarting the server when ...
https://dev.mysql.com/doc/refman/8.0/en/mysqldump-sql-format.html
Without this option, mysqldump treats the first name as a database name and those following as table names. This section describes how to use mysqldump to create SQL-format dump files. For information about reloading such dump files, see Section ...
https://dev.mysql.com/doc/refman/8.0/en/not-enough-file-handles.html
To tell mysqld to keep open fewer files at a time, you can make the table cache smaller by reducing the value of the table_open_cache system variable (the default value is 64). This may not entirely prevent running out of file descriptors because in ... If you get ERROR 'file_name' not found (errno: 23), Can't open file: file_name (errno: 24), or any other error with errno 23 or errno 24 from MySQL, it means that you have not allocated enough file descriptors for the MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/online-ddl-parallel-thread-configuration.html
Parallel scan is not supported on tables defined with virtual columns. Parallel scan is not supported on tables defined with a full-text index. Parallel scan is not supported on tables defined with a spatial index. The maximum setting is 256, which ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-transaction-management.html
Alternatively, for transactions that consist only of a single SELECT statement, turning on AUTOCOMMIT helps InnoDB to recognize read-only transactions and optimize them. When rows are modified or deleted within a long-running transaction, other ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-build-configuration.html
If you install MySQL over a previous installation that was configured without the Performance Schema (or with an older version of the Performance Schema that has missing or out-of-date tables). One indication of this issue is the presence of ...It ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-status-monitoring.html
When the server cannot create a mutex instrument, these results occur: No row for the instrument is inserted into the setup_instruments table. However, the content of the tables in the performance_schema database misses events. For example, ...Names ...