Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Postgres What they really use
Search
Craig Kerstiens
November 01, 2013
Technology
6
880
Postgres What they really use
Some insight into what features and functionality people actually use within their database.
Craig Kerstiens
November 01, 2013
Tweet
Share
More Decks by Craig Kerstiens
See All by Craig Kerstiens
Product planning w/ gridding - Effort vs. Impact rule of thirds
craigkerstiens
0
320
Five sharding data models and which is right? PGDay Nordic
craigkerstiens
0
200
Postgres at any scale
craigkerstiens
1
860
Five data models for sharding and which is right
craigkerstiens
0
150
Postgres Performance for Humans - All things Open
craigkerstiens
1
320
Postgres Performance for Humans - PyCaribbean
craigkerstiens
1
160
Postgres present and future
craigkerstiens
1
350
Marketing for Developers
craigkerstiens
0
260
Postgres – A Data Platform
craigkerstiens
2
480
Other Decks in Technology
See All in Technology
カンファレンスに託児サポートがあるということ / Having Childcare Support at Conferences
nobu09
1
440
E2Eテスト設計_自動化のリアル___Playwrightでの実践とMCPの試み__AIによるテスト観点作成_.pdf
findy_eventslides
1
530
JAZUG 15周年記念 × JAT「AI Agent開発者必見:"今"のOracle技術で拡張するAzure × OCIの共存アーキテクチャ」
shisyu_gaku
0
130
Access-what? why and how, A11Y for All - Nordic.js 2025
gdomiciano
1
120
社内報はAIにやらせよう / Let AI handle the company newsletter
saka2jp
8
1.2k
extension 現場で使えるXcodeショートカット一覧
ktombow
0
220
Where will it converge?
ibknadedeji
0
200
Escaping_the_Kraken_-_October_2025.pdf
mdalmijn
0
150
自動テストのコストと向き合ってみた
qa
0
200
【Kaigi on Rails 事後勉強会LT】MeはどうしてGirlsに? 私とRubyを繋いだRail(s)
joyfrommasara
0
170
10年の共創が示す、これからの開発者と企業の関係 ~ Crossroad
soracom
PRO
1
640
そのWAFのブロック、どう活かす? サービスを守るための実践的多層防御と思考法 / WAF blocks defense decision
kaminashi
0
110
Featured
See All Featured
A better future with KSS
kneath
239
18k
Designing for Performance
lara
610
69k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
31
9.7k
A designer walks into a library…
pauljervisheath
209
24k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Product Roadmaps are Hard
iamctodd
PRO
54
11k
Why You Should Never Use an ORM
jnunemaker
PRO
59
9.6k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
900
Facilitating Awesome Meetings
lara
56
6.6k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
37
2.6k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
45
2.5k
jQuery: Nuts, Bolts and Bling
dougneiner
64
7.9k
Transcript
@craigkerstiens Postgres What they really use
Interrupt me Ask questions
[email protected]
None
@craigkerstiens Postgres What they really use
Shameless plugs http://www.postgresweekly.com http://www.craigkerstiens.com http://www.postgresguide.com http://www.postgresapp.com http://postgres.heroku.com
Postgres - TLDR
Postgres - TLDR Datatypes Conditional Indexes Transactional DDL Foreign Data
Wrappers Concurrent Index Creation Extensions Common Table Expressions Fast Column Addition Listen/Notify Table Inheritance Per Transaction sync replication Window functions NoSQL inside SQL Momentum
What they really use ?
Why listen to what I say?
Largest fleet of Postgres in the world
Over 1 billion write transactions a day
What they really use ?
Production
43% on 9.1 2% on 9.0 54% on 9.2 Versions
Extensions
hstore pg_stat_statements postgis uuid-ossp pg_trgm unaccent fuzzystrmatch dblink cube pgcrypto
earthdistance tablefunc citext
extension adoption hstore 11.5% pg_stat_statements 3.5% postgis 3% uuid-ossp 3%
pg_trgm 3% unaccent 1.5% fuzzystrmatch 1.5% dblink 1.5% cube 1% pg_crypto 1% earthdistance 1% tablefunc 0.75% citext 0.5%
17% at least 1 of those 22% have 2 8%
have 3 2.5% have 4 .7% have 5 .2% have 11
PLV8 CREATE FUNCTION js_filter(js_function text, json_arguments text, data json) RETURNS
numeric as $$ var func = eval(js_function); var args = eval(json_arguments); var final_args = [data].concat(args); var result = func.apply(null, final_args); return 0 < result ? 1 : 0; $$ LANGUAGE plv8 IMMUTABLE STRICT;
PLV8 SELECT json_obj FROM some_table_with_json_obj_column WHERE js_filter( 'function (json, age)
{return json.age < age; }', '21', data.json_obj ) = 1; https://github.com/webnuts/full-throttle-postgres
Indexes
99.9% have an index 28% have gin 13% have gist
92% have unique 8% have conditional
Waste?
Unused Indexes
23% over 1000 rows 13% over 10000 rows 5% over
100000 rows 1.5% over 1 million rows 2% over 100 million rows
Bloat
0.1% over 100 GB 1.5% over 10 GB 8.7% over
1 GB 22.9% over 100 MB
2.3% over 100 MB and 5x bloat factor
Pg Extras https://github.com/heroku/heroku-pg-extras/
command usage index_usage 25.5% locks 19.0% cache_hit 18.0% blocking 7.5%
index_size 7.5% outliers 5.5% vacuum_stats 4.0% bloat 4.0% total_index_size 3.0% unused_indexes 2.0%
Problems new users face?
1. What do I need to pay attention to? 2.
How do I setup replication? 3. What editors are available? 4. How do I understand performance? 5. How can I use the cool stuff in my app? Top 5
Questions