Best and Cheap European MySQL 5.7.21 Hosting
MySQL 5.7.21, the most popular Open Source SQL database management system, is developed, distributed, and supported by Oracle Corporation. With its proven performance, reliability and ease-of-use, MySQL has become the leading database choice for web-based applications, used by high profile web properties including Facebook, Twitter, YouTube, Yahoo! and many more.
The MySQL database server provides the ultimate in scalability, sporting the capacity to handle deeply embedded applications with a footprint of only 1MB to running massive data warehouses holding terabytes of information. Platform flexibility is a stalwart feature of MySQL with all flavors of Linux, UNIX, and Windows being supported. And, of course, the open source nature of MySQL allows complete customization for those wanting to add unique requirements to the database server.
A unique storage-engine architecture allows database professionals to configure the MySQL database server specifically for particular applications, with the end result being amazing performance results. Whether the intended application is a high-speed transactional processing system or a high-volume web site that services a billion queries a day, MySQL can meet the most demanding performance expectations of any system. With high-speed load utilities, distinctive memory caches, full text indexes, and other performance-enhancing mechanisms, MySQL offers all the right ammunition for today’s critical business systems.
Changes in MySQL 5.7.21
Audit Log Notes
- Event-matching filter rules for the
audit_logplugin now support an
abortelement, which can be used to prevent qualifying events from executing. For more information, see Audit Log Filtering. This capability can be used, for example, to augment the capabilities of MySQL Enterprise Firewall, which blocks SQL statements on a per-user basis, by writing audit filtering rules that match statements and block them based on characteristics of the statements themselves.
Deprecation and Removal Notes
- Previously, the
--transaction-read-onlyserver startup options corresponded to the
tx_read_onlysystem variables. For better name correspondence between startup option and system variable names,
transaction_read_onlyhave been created as aliases for
tx_read_onlyvariables are now deprecated and will be removed in MySQL 8.0. Applications should be adjusted to use
- The query cache is now deprecated and is removed in MySQL 8.0. Deprecation includes these items:
FLUSH QUERY CACHEand
RESET QUERY CACHEstatements.
- These system variables:
- These status variables:
- The mysql client by default strips comments in statements sent to the server, and this behavior is controlled using
--skip-comments(strip comments), and
--comments(preserve comments).Comment stripping is now deprecated. This feature and the options to control it will be removed in a future MySQL release.
- These syntax constructs for table and column references are now deprecated and will be removed in a future version of MySQL. Instances of these constructs should be changed to remove the leading period.
- For platforms that use systemd (see Managing MySQL Server with systemd), the data directory is initialized if empty at server startup. This might be a problem if the data directory is a remote mount that has temporarily disappeared: The mount point would appear to be an empty data directory, which then would be initialized as a new data directory. It is now possible to suppress this automatic initialization behavior. specify the following line in the
/etc/sysconfig/mysqlfile (create the file if it does not exist):
(Bug #26595288, Bug #87287)
- mysqlcheck was missing in the MySQL Server Docker image, which prevented mysql_upgrade from running. (Bug #26400146, Bug #86968)
- Certificates automatically generated by mysqld and mysql_ssl_rsa_setup now use X509 v3 rather than v1. (Bug #26521654)
keyring_okvplugin now supports password-protecting the key file used for secure connections. See Using the keyring_okv KMIP Plugin.
X Plugin Notes
Mysqlx.Connection.CapabilitiesGetrequest using MySQL X Protocol did not return the complete list of available authentication mechanisms. (Bug #26044113)
- For mixed case or uppercase schema names, the statement
list_objectscould incorrectly report a collection as a table. (Bug #25769683)
- The X Plugin was omitted from the list of plugins to include for testing data directory permissions. (Bug #24823999)
Functionality Added or Changed
- Replication: In previous versions issuing
STOP GROUP_REPLICATIONstopped the plugin but the server still accepted transactions. This meant the transactions were not transmitted to the group. To make
STOP GROUP_REPLICATIONsafer, now
super_read_onlyis set to
ONimmediately upon issuing
STOP GROUP_REPLICATION, which ensures no transactions are accepted. (Bug #25495067, Bug #84795)
group_replication_member_weightvariable has been added which enables you to control the election of new primaries in single-primary mode. In previous versions primary election was based on the member’s UUID, with the lowest UUID elected as the new primary in the event of fail over. Use this variable to assign numeric weights to members to ensure that specific members are elected, for example during scheduled maintenance of the primary or to ensure certain hardware is prioritised.
ASPHostPortal.com as The Best and Cheap European MySQL 5.7.21 Hosting
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