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https://dev.mysql.com/doc/refman/5.7/en/problems-with-mysql-sock.html
On most versions of Unix, you can protect your /tmp directory so that files can be deleted only by their owners or the superuser (root). The default location for the Unix socket file that the server uses for communication with local clients is ...
https://dev.mysql.com/doc/refman/5.7/en/purge-binary-logs.html
PURGE { BINARY | MASTER } LOGS { TO 'log_name' | BEFORE datetime_expr } The binary log is a set of files that contain information about data modifications made by the MySQL server. The log consists of a set of binary log files, plus an index file ...The PURGE BINARY LOGS statement deletes all the binary log files listed in the log index file prior to the specified log file name or ...
https://dev.mysql.com/doc/refman/5.7/en/replication-howto-masterstatus.html
See Section 16.1.2.5.3, “Setting Up Replication between a New Source and Replicas” for how to proceed. Warning This procedure uses FLUSH TABLES WITH READ LOCK, which blocks COMMIT operations for InnoDB tables. The source's binary log coordinates ... To configure the replica to start the replication process at the correct point, you need to note the source's current coordinates within its binary ...
https://dev.mysql.com/doc/refman/5.7/en/replication-threads.html
You can enable further parallelization for tasks on a replica by setting the slave_parallel_workers system variable to a value greater than 0 (the default). Note Multithreaded replicas are not currently supported by NDB Cluster, which silently ...
https://dev.mysql.com/doc/refman/5.7/en/server-system-variable-reference.html
Please see the corresponding item descriptions for details on setting and using the variables. If a server option set on the command line or in an option file differs from the name of the corresponding system variable, the variable name is noted ...
https://dev.mysql.com/doc/refman/5.7/en/spatial-function-reference.html
The following table lists each spatial function and provides a short description of each one.
https://dev.mysql.com/doc/refman/5.7/en/spatial-relation-functions.html
MySQL implements two sets of functions using function names defined by the OpenGIS specification. One set tests the relationship between two geometry values using precise object shapes, the other set uses object minimum bounding rectangles (MBRs).
https://dev.mysql.com/doc/refman/5.7/en/which-version.html
For example, distributions normally are compiled with support for all character sets. If you want a smaller MySQL server, you can recompile it with support for only the character sets you need. When preparing to install MySQL, decide which version ...First, decide whether to install a development release or a General Availability (GA) ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-troubleshooting-datadict.html
Have you deleted the .frm file InnoDB: and not used DROP TABLE? Have you used DROP DATABASE InnoDB: for InnoDB tables in MySQL version <= 3.23.43? InnoDB: See the Restrictions section of the InnoDB manual. If the original table resides in a ...
https://dev.mysql.com/doc/refman/5.7/en/rebuilding-tables.html
This section describes how to rebuild or repair tables or indexes, which may be necessitated by: Changes to how MySQL handles data types or character sets. For example, an error in a collation might have been corrected, necessitating a table ...