mysql 5.7 -- scale feb 2014

➔ Dave Stokes➔ MySQL Community Manager

➔ David.Stokes@oracle.com @Stoker

MySQL 5.7 Preview for LA MySQL Users Group

The following 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

decision. The development, release, and timing of any features or

functionality described for Oracle’s products remains at the sole

discretion of Oracle.

Safe Harbor Statement

MySQL Manual 5.7

• Performance Improvements• MDL, Transactions & Memory

Instrumentation with Performance Schema

• Cleans up and improves architecture

But 5.7 will BREAK some things

• Yes, we KNOW it is painful!• We are trying to be

• As carefule as possible• Provide as much notice as possible• Let you know why we made the change

Things to do to help the change

• Change the default to use desired behavior• Issue warnings about feature deprecations• Remove features

We are doing all three

Proposal: enable sql mode to ONLY_FULL_GROUP

• Default behavior for other databases• In 5.6 and lower, MySQL was guessing what to use for non-grouped

fields.– New ANY_VALUE() SQL Function to allow 'non-deterministic'

statements so things can work 'old way'

Replication

• 5.6 provided more durable replication with group commit • 5.7 proposal – make durable the default

– sync_binlog =1

– Master-info-repository = TABLE

– Relay-log-infor-repository = TABLE

Proposal

• Deprecate SHOW ENGINE INNODB MUTEX• Overlaps with Performance Schema

• Deprecate InnoDB Monitor tables

– Developed long before Performance Schema

Proposal – make STRICT the default SQL Mode

• Lot of criticism that MySQL is too permissive, truncating out-of-range, zero dates, etc.

• Roll ERROR_FOR_DIVISION_BY_ZERO, NO_ZERO_DATE, and NO_ZERO_IN_DATE into STRICT Mode

Proposal

• Deprecate EXPLAIN PARTITIONS• Deprecate EXPLAIN EXTENDED

Alter Ignore Table

• Useful for adding PRIMAY/UNIQUE keys on tables with duplicate keys

• Will silently drop rows for you

• Deprecated 5.7.17

• Removed in DMR4

• Was a MySQL-only extension

Query Cache

● Defaults to DISABLED in 5.6

● Plans for other options in later releases

Deprecate NULL synonym \N

• Anyone using? We DO want feedback!!• For removal in 5.7 or 5.8

FEDERATE & MERGE Storage Engines

• We recommend multi-source replication over Federated

• We want your feedback if you are still using Federated!!

• Similar to Partitioning but MyISAM ONLY• Major limitations with Partition Exchange• Anyone using?

Slide to check if audience is still awake

• 191 Worklogs for 5.6• 191 Bugs fixed in 5.6• 3763 Bugs in total since 5.5 GA• 911 New MTR tests in MySQL 5.6• Tripled QA team – 400 man/years experience

Driving Innovation AND Quality

New Yum Repositories--Now with 5.7 DRMs

● Simple and convenient way to install and update MySQL to the latest software packages using Yum

– Server

– Workbench

– Connectors

Benchmarks

● Sysbench Point Select

– 500,000 Queries Per Second, ~ 64 concurrent user sessions

– 95% faster than 5.6, ~32 concurrent user sessions

– 172% faster than 5.5

● InnoDB Memached

– 1,150,000 QPS, ~128 concurrent user sessions

– 550% faster than 5.6

• Optimized for Web, Cloud-based, Embedded use cases• Simplified, Pluggable architecture

• Maintainability, more extensible• More NoSQL options (HTTP, JSON, JavaScript, etc.)

• Refactoring• Data Dictionary in InnoDB• Optimizer/Parser/Protocol

• InnoDB • Optimized for SSD • GIS

• Easy HA, Replication and Sharding → Fabric

MySQL Database Development Priorities

Connections Per Second

● 5.5.23 ~ 19k without P_S and ~18k with

● 5.6.15 ~ 24K and 19.5k

● 5.7.2 ~44k and ~18k

● 5.7.3 ~45k and ~44k

● Thanks to help from Facebook!!

Optimizer

● Improved JSON based explain

– VISUAL EXPLAIN

– Better traces

● Improved “IN” performance

● Non sorted fields in sort buffer compacted, reduces disk sorts

Performance_schema

● New summary tables

– Easier place to start

– Metadata Lock Instrumentation

InnoDB

● Online rename index, online change to varchars

● Innochecksums (in 5.6) for calculated/reported → report

● 5.7

– Selectable algorithm (innodb/crc32/none)

– Force rewrite of checksum (even if invalid)

– Table spaces > 3GB supported

– Specify max page count mismatch before terminating

– Supports multiple table spaced, files per tablespace

InnoDB temp tables

● New separate table space for temp tables

● Better create/drop – 11x faster

● 2-4x faster INSERT/DELETE/UPDATE

● Optimized DML operations

● Undo logs in temp table spces

Replication

● Higher slave throughput, parallel threads on same schema

● Enhanced semi-sync, wait for N slaves

● Performance_Schema

● Added SSL for mysqlbinlog

● Dynamically change replication filers

– CHANGE REPLICATION FILTER

– No need to start/sop server to make changes

Triggers

● Multiple Triggers per table

● Set execution order

● Check column constraints at end of trigger execution

Error logging

● Three levels

– Errors Only

– Errors + Warnings

– Errors + Warnings + Notes (default)

● --log-error-verbosity = 1

● SET GLOBAL log_error_verbosity=1;

● --log_timestamps = SYSTEM UTC (default)

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Learn More

New MySQL 5.6 TrainingLearn about the world’s most popular open-source database

oracle.com/education/mysql

Learn MySQL From Oracle• Expert-led training to help you

install, configure, and administer MySQL 5.6.

• Extensive hands-on practices guide you through each concept

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• Content developed in collaboration with product engineering.

• Available in traditional or virtual classroom as well as self-study formats.

• Custom training solutions to match your organization’s specific business needs

• Backed by Oracle University’s 100% Satisfaction Program

MySQL Connect

➔ September, 4-days at same time as OOW

➔ San Francisco Union Square Hotel?➔ Learn from the best

➔ MySQL Engineers➔ Customers

➔ Tutorials on Advanced Subjects➔ Passes for User Groups?

➔ How do we discount for UG???

MySQL 5.7

David.Stokes@Oracle.com@stokerslideshare.net/davestokes

mysql 5.7 -- scale feb 2014

oracle andor

sole discretion of oracle

update mysql

mysql manual

group default behavior

durable replication

performance schema8copyright

innodb memached

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