Access databases, monitor and adjust MySQL settings. Keep track of the status of MySQL replication, tweak the application code parameters, work with dynamic queries and database schemas that generate statistics about server execution and query performance.
MySQL is a relational database management system. The program runs as a server providing access to the databases. MySQL 's source code is available under terms of the GPL License, that means you can download it and use for free. If you want support and training by the company, you can contact them. You can have it up to date with tools for upgrading and configuring MySQL. Monitoring and adjusting MySQL settings that will tune, scale and maintain performance. In production, you can setting-up and monitor the status of MySQL replication with a simple and easy to use interface. Application code, database schemas and dynamic queries can be tunned up if you experience performance issues.
As a counterpart, MySQL 5.1 has some known bugs in addition to the present in version 5.0. Critical bugs sometimes do not get fixed for long periods of time. Also it shows poor performance when used for Data Warehousing; this is partly due to inability to take advantage of a cluster of CPU cores for processing a single query. Despite all this, this is the preferred database for web developers.
v5.6 [Jul 29, 2011]
Security Notes
- Security Fix: The linked OpenSSL library for the MySQL 5.6 Commercial Server has been updated from version 1.0.1g to version 1.0.1h. Versions of OpenSSL prior to and including 1.0.1g are reported to be vulnerable to CVE-2014-0224. This change does not affect the Oracle-produced MySQL Community build of MySQL Server 5.6, which uses the yaSSL library instead.
DTrace Support
- MySQL now includes DTrace support on Oracle Linux 6 or higher with UEK kernel. If DTrace is present, server builds will detect it with no special CMake options required.
InnoDB Notes
- Important Change: Redo log writes for large, externally stored BLOB fields could overwrite the most recent checkpoint. The 5.6.20 patch limits the size of redo log BLOB writes to 10% of the redo log file size. The 5.7.5 patch addresses the bug without imposing a limitation. As a result of the redo log BLOB write limit introduced for MySQL 5.6, innodb_log_file_size should be set to a value greater than 10 times the largest BLOB data size found in the rows of your tables plus the length of other variable length fields (VARCHAR, VARBINARY, and TEXT type fields). Failing to do so could result in “Row size too large” errors. No action is required if your innodb_log_file_size setting is already sufficiently large or your tables contain no BLOB data.
Functionality Added or Changed
- Replication: The system variable binlog_impossible_mode controls what happens if the server cannot write to the binary log, for example, due to a file error. For backward compatibility, the default for binlog_impossible_mode is IGNORE_ERROR, meaning the server logs the error, halts logging, and continues updates to the database. Setting this variable to ABORT_SERVER makes the server halt logging and shut down if it cannot write to the binary log.
- The mysqlhotcopy utility is now deprecated and will be removed in a future version of MySQL. Among the reasons for this: It works only for the MyISAM and ARCHIVE storage engines; it works on Unix but not Windows. Alternatives include mysqldump and MySQL Enterprise Backup.
- CMake support was updated to handle CMake version 3.
Feature-rich relational database known for its high performance and excellent concurrency
