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https://dev.mysql.com/doc/refman/5.7/en/json-functions.html
A set of spatial functions for operating on GeoJSON values is also available. The functions described in this section perform operations on JSON values. For discussion of the JSON data type and additional examples showing how to use these ...
https://dev.mysql.com/doc/refman/5.7/en/large-page-support.html
Applications that perform a lot of memory accesses may obtain performance improvements by using large pages due to reduced Translation Lookaside Buffer (TLB) misses. In MySQL, large pages can be used by InnoDB, to allocate memory for its buffer pool ... Some hardware and operating system architectures support memory pages greater than the default (usually ...
https://dev.mysql.com/doc/refman/5.7/en/libmysqld-compiling.html
The next line of code tells the compiler to obtain the location of the include files and libraries and other settings for the system on which it is compiled. The correct flags for compiling and linking a threaded program must be used, even if you do ... In precompiled binary MySQL distributions that include libmysqld, the embedded server library, MySQL builds the library using the appropriate vendor compiler if there is ...
https://dev.mysql.com/doc/refman/5.7/en/merge-table-problems.html
Because the MERGE engine cannot enforce uniqueness over the set of underlying tables, REPLACE does not work as expected. The INSERT_METHOD table option for a MERGE table indicates which underlying MyISAM table to use for inserts into the MERGE table. However, use of the AUTO_INCREMENT table option for that MyISAM table has no effect for inserts into the MERGE table until at least one row has been inserted directly into the MyISAM ...
https://dev.mysql.com/doc/refman/5.7/en/myisamchk-check-options.html
myisamchk supports the following options for table checking operations: --check, -c Command-Line Format --check Check the table for errors. --check-only-changed, -C Command-Line Format --check-only-changed Check only tables that have changed since ...This is the default operation if you specify no option that selects an operation type ...
https://dev.mysql.com/doc/refman/5.7/en/myisamchk-other-options.html
--block-search=offset, -b offset Command-Line Format --block-search=offset Type Numeric Find the record that a block at the given offset belongs to. --set-auto-increment[=value], -A[value] Force AUTO_INCREMENT numbering for new records to start at ... myisamchk supports the following options for actions other than table checks and repairs: --analyze, -a Command-Line Format --analyze Analyze the distribution of key ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-disk-data.html
These include a “no-steal” algorithm for synchronizing a starting node with very large data sets. As part of implementing NDB Cluster Disk Data work, a number of improvements were made in NDB Cluster for the efficient handling of very large ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-event-reports.html
Cluster logging information can also be sent to stdout or a syslog facility in addition to or instead of being saved to a file, as determined by the values set for the DataDir and LogDestination configuration parameters. The cluster log is the log ... In this section, we discuss the types of event logs provided by NDB Cluster, and the types of events that are ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-limitations-unsupported.html
A number of features supported by other storage engines are not supported for NDB tables. Trying to use any of these features in NDB Cluster does not cause errors in or of itself; however, errors may occur in applications that expects the features ...Statements referencing such features, even if effectively ignored by NDB, must be syntactically and otherwise ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-disk-write-speed-aggregate.html
The disk_write_speed_aggregate table provides aggregated information about the speed of disk writes during LCP, backup, and restore operations.