InnoDB Enhancements and Roadmap - MySQL€¦ · InnoDB 1.1 Enhancements Multiple buffer pool instances Multiple rollback segments Performance schema for InnoDB Improved purge scheduling

InnoDB Enhancements and RoadmapMySQL Sunday Track at Oracle OpenWorldSeptember 19, 2010

Calvin Sun, Oracle/InnoDB

Saturday, 11 September 2010

© 2010 Oracle Corporation 2

Agenda

What is InnoDB? InnoDB Key Characteristics InnoDB 1.0 Enhancements InnoDB 1.1 Enhancements InnoDB Roadmap



What is InnoDB? The most popular transactional storage engine for

MySQL Architected and written by Dr. Heikki Tuuri Based on sound database computer science,

industry best practices, and innovationo Modeled on Gray & Reuter’s “Transactions Processing:

Concepts & Techniques”o Also emulated the Oracle architectureo Added unique subsystems/features

• Doublewrite• Change buffering• Adaptive hash index

Many key features for performance and data integrity InnoDB 1.0 in MySQL 5.1, InnoDB 1.1 in MySQL 5.5



InnoDB Key Characteristics

Row-level locking Multi-version concurrency control High performance CPU, memory and I/O

architecture Efficient indexing (covering indexes) Adaptive hash indexing Insert buffering




Row-level locking Multi-version concurrency control High performance CPU, memory and I/O

architecture Efficient indexing (covering indexes) Adaptive hash indexing Insert buffering

Fast




ACID-compliant transactions Two phase commit Automatic crash recovery Doublewrite buffer Referential integrity Online backup with MySQL Enterprise Backup Well written, well tested code




ACID-compliant transactions Two phase commit Automatic crash recovery Doublewrite buffer Referential integrity Online backup with MySQL Enterprise Backup Well written, well tested code

Reliable




Distributed by MySQL since 2001 Deployed by millions of users Wide use in large-scale enterprise customers




Distributed by MySQL since 2001 Deployed by millions of users Wide use in large-scale enterprise customers

Proven



InnoDB 1.0 Enhancements

Performance and Scalability Enhancements• Faster locking for improved scalability• Multiple background I/O threads• Improvements to crash recovery performance• Group commit• Controlling master thread I/O rate• Controlling flushing rate of dirty pages• Changes in read ahead algorithm• Using a portable PAUSE to InnoDB spin loop• Making buffer cache scan resistant• Using operating system memory allocators




Page compression Fast index creation Information schema tables Other changes for flexibility, easy of use




Multiple buffer pool instances Multiple rollback segments Performance schema for InnoDB Improved purge scheduling Improved log sys mutex Separate flush list mutex Extended change buffering with delete

buffering and purge buffering Native async I/O support on Linux Windows performance improvement




Multiple buffer pool instances Multiple rollback segments Performance schema for InnoDB Improved purge scheduling Improved log sys mutex Separate flush list mutex Extended change buffering with delete

buffering and purge buffering Native async I/O support on Linux Windows performance improvement

RC



MySQL 5.5 / InnoDB 1.1 Benchmarkssysbench

MySQL 5.1.40(InnoDB builtin)

MySQL 5.1.40 (InnoDB 1.0.4)

MySQL 5.5.4 (InnoDB 1.1)

Intel Xeon X7460 x86_64 4 CPU x 6 Cores/CPU 2.66 GHz, 32GB RAM Fedora 10



MySQL 5.5 / InnoDB 1.1 Benchmarks sysbench

Intel Xeon X7460 x86_64 4 CPU x 6 Cores/CPU 2.66 GHz, 32GB RAM Fedora 10

MySQL 5.1.40(InnoDB builtin)

MySQL 5.1.40 (InnoDB 1.0.4)

MySQL 5.5.4 (InnoDB 1.1)



OLTP Read/Write Scalability (4->16 cores)



OLTP Read-Only Scalability (4->16 cores)



For DBT2, InnoDB 1.1 (MySQL 5.5.6-rc) has about 30% performance increase over InnoDB 1.0 (MySQL 5.1.50) for 100 connections.

InnoDB 1.0 (MySQL 5.1.50) has 57% performance gain over InnoDB builtin in MySQL 5.1.50 in the same case.

It also significantly reduces the # of kernel objects used by the InnoDB. With a 4GB innodb_buffer_pool: # of events: 1199518 --- before the fix # of events: 642 --- after the fix

Windows Performance Improvement



InnoDB Roadmap

InnoDB Focus:• Performance and scalability• Online operations• Monitoring & diagnostics• Windows improvements



InnoDB Roadmap

Performance and Scalability• Multi-threaded purge• Kernel mutex split (cont)• Make InnoDB mutexes green• Improved deadlock checking• Async flushing in master thread• Async redo application during recovery• Add a LRU list to the data directory



InnoDB Roadmap

Performance and Scalability (cont)• page_hash patch with multiple buffer pools• Improvements on Windows • Optimized for SSD

Online DDLs• Online Add/Drop Index



InnoDB Roadmap

Monitoring and Diagnostics• Metrics tables

• Additional information schema tables and performance statistics

Others• Persistent optimizer statistics• MRR/ICP support for InnoDB• InnoDB fulltext search



The preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions.The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle.



AQ&Q U E S T I O N S

A N S W E R S



Performance and Scalability Enhancements in MySQL 5.5

Thomas Anderson

Thanks for attending!


Documents

InnoDB Enhancements and Roadmap - MySQL€¦ · InnoDB 1.1 Enhancements Multiple buffer pool instances Multiple rollback segments Performance schema for InnoDB Improved purge scheduling