mysql8 fordevelopers - percona · mysql 8 may be slower than mysql 5.7 on low powered systems and...

© 2018 Percona. 1

Peter Zaitsev, CEO, Percona

MySQL 8 for DevelopersLots of things to be looking forward to

December 12, 2018

Percona Technical Webinars

© 2018 Percona. 2

MySQL 8 – Adoption

Where do we stand ?

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MySQL 8 News

Good News and Bad News

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MySQL 8 Adoption by Wordpress Users

https://wordpress.org/about/stats/

https://wordpress.org/about/stats/

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MySQL 8 may be slower than MySQL 5.7 on low powered systems and at low concurrency

MySQL 8 Performance Regressions

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200

400

600

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1000

1200

1400

5.7.22 8.0.11

Transactions/sec TPCC 4 CPU Cores 128 Clients

© 2018 Percona. 6

Having Said that

Most Serious MySQL users are actively planning MySQL 8 migration

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MySQL 8 Development Model

Excited to see new features are being released in Maintenance releases

More “Cloud Friendly” Development Model

Much higher requirements for Quality Assurance

© 2018 Percona. 8

Source Notes

Examples liberally borrowed from Oracle team presentations and Blog Posts

© 2018 Percona. 9

MySQL 8 for Devs

© 2018 Percona. 10

Much Better and Faster UTF8• utf8mb4 as Default Charset

© 2018 Percona. 11

Fast Information Schema

Scaling from 5.000 to 1.000.000 tables

© 2018 Percona. 12

Instant Add Column (8.0.13)

•ALTER TABLE t1 ADD COLUMN d INT DEFAULT 1000, ALGORITHM=INSTANT;

Add Column without

rebuilding table

© 2018 Percona. 13

Functions in DEFAULT (8.0.13)

CREATE TABLE t2 (a BINARY(16) DEFAULT uuid_to_bin(uuid()));

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Functional Indexes (8.0.13)

CREATE INDEX idx1 ON t1 ((col1+col2));

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Innodb NO WAIT and SKIP LOCKED

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Descending Indexes

Descending flag in index definition is no more ignored

Allows efficient handling of ORDER BY A ASC, B DESC queries

© 2018 Percona. 17

Persistent Auto Increment

Another feature 10 years overdue

Do not reset AUTO INCREMENT to the max value in the table on restart

© 2018 Percona. 18

Partial In-Place Update for JSON

Can update field in JSON object without full re-write

Great for counters, statuses, timestamps etc

Only update and removal of element is supported

Full Support Added in Maintenance Releases

© 2018 Percona. 19

Better Optimizer

Many Optimizer improvements in MySQL 8

Your queries will run faster (or not)

© 2018 Percona. 20

Optimizer Histograms• Detailed Statistics on Columns, not just Indexes

© 2018 Percona. 21

Improved Optimizer Cost Model

Keep in account how much of data is cached vs

on disk

© 2018 Percona. 22

Optimizer HintsSet optimizer_switch settings for given query/tables

© 2018 Percona. 23

Invisible Indexes• Test impact of dropping indexes before actually dropping them• Can use use_invisible_indexes to use invisible indexes in a

session

© 2018 Percona. 24

Multibyte Safe Regular Expressions

Using Regexp with utf8 ?

© 2018 Percona. 25

Remote Management Features

RESTART (Command)

SET PERSIST innodb_buffer_pool_size = 1024 * 1024 * 1024;

© 2018 Percona. 26

Aggregation of Relational into JSON• JSON_ARRAYAGG() and JSON_OBJECTAGG()

© 2018 Percona. 27

JSON to Table Conversion

© 2018 Percona. 32

A lot of new SQL Features

https://modern-sql.com/blog/2018-04/mysql-8.0

https://modern-sql.com/blog/2018-04/mysql-8.0

© 2018 Percona. 34

New Authentication

Improved Security

Can cause problems with legacy drivers

mysql_native_password - workaround

© 2018 Percona. 37

Percona Server for MySQL 8

Fully compatible with MySQL 8 Community

Alternatives for most of “MySQL Enterprise” features

100% Free and Open Source

MyRocks storage engine for modern workloads

Advanced Encryption Options

Shipping in next 30 days, Release Candidate Available

mysql8 fordevelopers - percona · mysql 8 may be slower than mysql 5.7 on low powered systems and...

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