Gipson Pulla MySQL Community Server 5.5.57 has been released
Jul 17, 2017; 16:45
MySQL Community Server 5.5.57 has been released
Dear MySQL users,
MySQL Server 5.5.57 is a new version of the 5.5 production release of the world's most popular open source database. MySQL 5.5.57 is recommended for use on production systems.
MySQL 5.5 includes several high-impact enhancements to improve the performance and scalability of the MySQL Database, taking advantage of the latest multi-CPU and multi-core hardware and operating systems. In addition, with release 5.5, InnoDB is now the default storage engine for the MySQL Database, delivering ACID transactions, referential integrity and crash recovery by default.
MySQL 5.5 also provides a number of additional enhancements including:
- Significantly improved performance on Windows, with various Windows specific features and improvements - Higher availability, with new semi-synchronous replication and Replication Heartbeat - Improved usability, with Improved index and table partitioning, SIGNAL/RESIGNAL support and enhanced diagnostics, including a new Performance Schema monitoring capability.
For a more complete look at what's new in MySQL 5.5, please see the following resources:
If you are running a MySQL production level system, we would like to direct your attention to MySQL Enterprise Edition, which includes the most comprehensive set of MySQL production, backup, monitoring, modeling, development, and administration tools so businesses can achieve the highest levels of MySQL performance, security and uptime.
For information on installing MySQL 5.5.57 on new servers, please see the MySQL installation documentation at
* mysqladmin was added to Docker/Minimal packages because it is needed by InnoDB Cluster. (Bug #25998285)
Functionality Added or Changed
* The mysql client now supports a --binary-as-hex option that causes display of binary data using hexadecimal notation (0xvalue). Thanks to Dani=C3=ABl van Eeden for the patch. (Bug #25340722, Bug #84391)
* Replication: If a relay log index file named relay log files that did not exist, RESET SLAVE ALL sometimes did not fully clean up properly. (Bug #24901077)
* The Perl path in #! lines at the beginning of Perl scripts has been adjusted to /usr/local/bin/perl for FreeBSD 11. (Bug #25719975)
* A race condition could occur for CREATE TABLE statements with DATA DIRECTORY or INDEX DIRECTORY clauses. (Bug #25451091)
* Full-text code now uses the standard isalnum() function rather than the my_isalnum() macro, for improved handling of default character set structure. (Bug #25447551)
* MySQL compilation in different directories produced different builds to leakage of absolute paths into debug information and __FILE__. (Bug #25436469, Bug #84608)
* mysqld_failed to start the server if the --datadir option was specified with a relative path name. (Bug #25364806)
* With read_only enabled, creation of non-TEMPORARY tables by non-SUPER users was permitted under certain conditions. (Bug #25250768)
* mysqlaccess was subject to code injection. (Bug #25043674)
* On x86 machines, the uint3korr() macro read 4 bytes of data instead of the intended 3 bytes. (Bug #24807826, Bug #83264)
* LOAD XML INFILE performance became noticeably slower when the XML file being read contained a great many spaces, such as those introduced by indenting or pretty-printing. Now all leading whitespace is trimmed from each such value before reading it into memory. (Bug #16212207)
On Behalf of MySQL/ORACLE RE Team Gipson Pulla
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