What's new in MySQL 5.5? FOSDEM 2011

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Slides of my MySQL & Friends DevRoom talk at FOSDEM 2011 in Brussels on 2011-02-05 http://fosdem.org/2011/schedule/event/mysql_new_in_5_5

Tecnologia

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What's new in MySQL 5.5?
Lenz Grimmer
MySQL Community Relations Specialist

MySQL 5.5 Highlights

• InnoDB becomes the default
• Improved Performance & Scalability
• Improved Availability
• Improved Manageability & Usability
• Improved Instrumentation & Diagnostics

InnoDB 1.1 as Default Storage Engine

• ACID Transactions, Foreign Keys, Crash
Recovery
• Plugin replaces built-in version
• Newly created tables use InnoDB by default
• MyISAM and other Storage Engines still
available
• Many performance/scalability improvements
• Better instrumentation & diagnostics

InnoDB Performance improvements

• Multiple/Split Buffer Pool Instances
• Multiple Rollback Segments
• Improved recovery performance
• Native async I/O on Linux
• Extended Change Buffering (with delete
buffering, purge buffering)
• Control of overall I/O capacity
• Restored group commit

InnoDB Scalability Improvements

• Improved Log Sys mutex
• Separate Flush List mutex
• Improved Purge Scheduling
• Improved default thread concurrency
• Control of background I/O threads
• Control of using the OS memory allocator
• Faster locking algorithms

InnoDB Instrumentation/Diagnostics

• InnoDB stats in PERFORMANCE_SCHEMA
• More extensive SHOW ENGINE INNODB
STATUS
• New INFORMATION_SCHEMA tables

Improved Availability

• Semi-synchronous Replication
• Replication Heartbeat
• Replication Slave fsync() options
• Automatic Relay Log Recovery
• Per-master event filtering
• Replication Slave Side Type Conversions
• Individual Log Flushing
• SHOW RELAYLOG EVENTS

Improved Manageability & Usability

• PERFORMANCE_SCHEMA
• SIGNAL/RESIGNAL
• Pluggable authentication framework
• More Partitioning Options

Give it a spin!

• Download MySQL 5.5 from the usual place:
http://dev.mysql.com/downloads/mysql/
• Send us feedback and bug reports:
http://bugs.mysql.com/
• Questions? Use the Forums or Mailing Lists:
http://forums.mysql.com http://lists.mysql.com
• Blog about your experiences:
http://planet.mysql.com

Thank you!
Lenz Grimmer <lenz.grimmer@oracle.com>
http://www.lenzg.net/
@lenzgr

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