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From:Murthy Narkedimilli Date:July 24 2015 4:31pm
Subject:MySQL Community Server 5.5.45 has been released
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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:


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 5.5.45 on new servers, please see
the MySQL installation documentation at

For upgrading from previous MySQL releases, please see the important
upgrade considerations at:

MySQL Database 5.5.45 is available in source and binary form for a
number of platforms from our download pages at:

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:


Changes in MySQL 5.5.45 (2015-07-24)

     * Security Notes

     * Bugs Fixed

   Security Notes

     * Security Fix: Due to the LogJam issue
       (, OpenSSL has changed the
       Diffie-Hellman key length parameters for openssl-1.0.1n
       and up. OpenSSL has provided a detailed explanation at 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

   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

MySQL Community Server 5.5.45 has been releasedMurthy Narkedimilli24 Jul