Dear MySQL users,
MySQL Server 5.5.45 is a new version of the 5.5 production release
of the world's most popular open source database. MySQL 5.5.45 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:
MySQL 5.5 is GA, Interview with Tomas Ulin:
http://dev.mysql.com/tech-resources/interviews/thomas-ulin-mysql-55.html
Documentation:
http://dev.mysql.com/doc/refman/5.5/en/mysql-nutshell.html
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.
http://mysql.com/products/enterprise/
For information on installing MySQL 5.5.45 on new servers, please see
the MySQL installation documentation at
http://dev.mysql.com/doc/refman/5.5/en/installing.html
For upgrading from previous MySQL releases, please see the important
upgrade considerations at:
http://dev.mysql.com/doc/refman/5.5/en/upgrading.html
MySQL Database 5.5.45 is available in source and binary form for a
number of platforms from our download pages at:
http://dev.mysql.com/downloads/mysql/
The following section lists the changes in the MySQL source code since
the previous released version of MySQL 5.5. It may also be viewed
online at:
http://dev.mysql.com/doc/relnotes/mysql/5.5/en/news-5-5-45.html
Enjoy!
==============================================================================
Changes in MySQL 5.5.45 (2015-07-24)
* Security Notes
* Bugs Fixed
Security Notes
* Security Fix: Due to the LogJam issue
(https://weakdh.org/), OpenSSL has changed the
Diffie-Hellman key length parameters for openssl-1.0.1n
and up. OpenSSL has provided a detailed explanation at
http://openssl.org/news/secadv_20150611.txt. To adopt
this change in MySQL, the key length used in
vio/viosslfactories.c for creating Diffie-Hellman keys
has been increased from 512 to 2,048 bits. (Bug #77275,
Bug #21221862, Bug #18367167, Bug #21307471, Bug
#21449838)
Bugs Fixed
* InnoDB: On Unix-like platforms,
os_file_create_simple_no_error_handling_func and
os_file_create_func opened files in different modes when
innodb_flush_method was set to O_DIRECT. (Bug #21113036,
Bug #76627)
* InnoDB: An assertion was raised when InnoDB attempted to
dereference a NULL foreign key object. (Bug #20762798)
* InnoDB: An index record was not found on rollback due to
inconsistencies in the purge_node_t structure. (Bug
#19138298, Bug #70214, Bug #21126772, Bug #21065746)
* The Spencer regex library used for the REGEXP operator
could be subject to heap overflow in some circumstances.
(Bug #20642505)
* A buffer-overflow error could occur for mysqlslap during
option parsing. (Bug #20605441)
* GROUP BY or ORDER BY on a CHAR(0) NOT NULL column could
lead to a server exit. (Bug #19660891)
* mysql-systemd-start failed if datadir was set in
/etc/my.cnf. (Bug #77357, Bug #21262883)
On behalf of Oracle MySQL Release Engineering Team,
Murthy Narkedimilli