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
ActiveRecord::PostgreSQLAnalyzer gem を作った話 #m3dev
Search
Takayuki Matsubara
December 22, 2015
Programming
1
200
ActiveRecord::PostgreSQLAnalyzer gem を作った話 #m3dev
M3 Tech Talk で「ActiveRecord::PostgreSQLAnalyzer gem を作った話」というタイトルで LT したときの資料です。
#m3dev
Takayuki Matsubara
December 22, 2015
Tweet
Share
More Decks by Takayuki Matsubara
See All by Takayuki Matsubara
Rails Web Development with AWS Lambda
ma2gedev
0
290
Coding Challenge Advent of Code 2019
ma2gedev
0
140
Developer Experience in GraphQL Schema-first Development
ma2gedev
0
2.3k
Dependency Inversion Principle in Keyboard Firmware
ma2gedev
0
490
OSSの歩き方 / Walking with OSS
ma2gedev
10
2.6k
GraphQL 開発で必要になったこと / What we needed for GraphQL development
ma2gedev
0
1.2k
キーボードをカスタムしてプログラミング環境を良くした話 / Improved programming environment with customizing keybords
ma2gedev
0
1.3k
Translating "Erlang in Anger" with Erlang & Elixir community members
ma2gedev
0
2.8k
Dive into Elixir v1.6 Code Formatter
ma2gedev
1
180
Other Decks in Programming
See All in Programming
11年かかって やっとVibe Codingに 時代が追いつきましたね
yimajo
1
240
なぜ今、Terraformの本を書いたのか? - 著者陣に聞く!『Terraformではじめる実践IaC』登壇資料
fufuhu
4
400
新しいモバイルアプリ勉強会(仮)について
uetyo
1
250
React は次の10年を生き残れるか:3つのトレンドから考える
oukayuka
41
16k
Jakarta EE Meets AI
ivargrimstad
0
580
バイブスあるコーディングで ~PHP~ 便利ツールをつくるプラクティス
uzulla
1
320
構文解析器入門
ydah
7
2k
Comparing decimals in Swift Testing
417_72ki
0
160
Google I/O Extended Incheon 2025 ~ What's new in Android development tools
pluu
1
220
[DevinMeetupTokyo2025] コード書かせないDevinの使い方
takumiyoshikawa
2
260
実践 Dev Containers × Claude Code
touyu
1
130
中級グラフィックス入門~効率的なメッシュレット描画~
projectasura
4
2.4k
Featured
See All Featured
How STYLIGHT went responsive
nonsquared
100
5.7k
Gamification - CAS2011
davidbonilla
81
5.4k
StorybookのUI Testing Handbookを読んだ
zakiyama
30
6k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
30
2.2k
The Pragmatic Product Professional
lauravandoore
36
6.8k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
46
7.5k
Visualization
eitanlees
146
16k
Automating Front-end Workflow
addyosmani
1370
200k
Being A Developer After 40
akosma
90
590k
Unsuck your backbone
ammeep
671
58k
Optimising Largest Contentful Paint
csswizardry
37
3.4k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
47
9.6k
Transcript
ActiveRecord::Postgr eSQLAnalyzer gem Λ࡞ͬͨ !
ࣗݾհ
TODO: !
⭐ github.com/ma2gedev/ power_assert_ex
ActiveRecord::PostgreSQLAnalyzer https://github.com/m3dev/ active_record- postgresql_analyzer
͖͔͚ͬ
m3 advent calendar
SAStruts + S2JDBC ͷࢥ͍ग़ʹ͍ͭͯ ଘʹޠΔ #m3dev — @seratch http://qiita.com/ seratch@github/items/
826f1b4a89993d3b0804
Sequential Scan ݕ
ศརͦ͏ ͪͳΈʹ͜ͷΞΠσΞࣗମ S2JDBC ʹݶఆ͞Ε·ͤΜɻࠓͬͨϓϩδ ΣΫτͰ Scala ͷΞϓϦέʔγϣϯ Ͱಉ͡Α͏ͳίʔυΛॻ͍ͨͷͰ͢ ͕ɺඇৗʹ༗༻Ͱͨ͠ɻ —
@seratch
Ruby(RoR)ʁ
ͳ͚Ε࡞Ζ ͏ OSS
ActiveRecord::PostgreSQLAnalyzer https://github.com/m3dev/ active_record- postgresql_analyzer
Rails ͰγʔέϯγϟϧεΩ ϟϯ͍ͯ͠ΔΫΤϦΛݟ ͚ͭͯḿΓ͍ͨ - PostgreSQL ݶ ఆ http://qiita.com/ma2ge/ items/0df91b0fbd90808f40d5
όζͬ ͨʂʁ
όζͬͯͳ ͍
ͩ͞·͞͠ऑऀ͗ͯ͢ࠔͬͨͷͰ Scala ͰίϯύΠϧ͢Δ͜ͱʹͨ͠ — @seratch http://qiita.com/ seratch@github/items/ 3be26b584f3d74aa1150
͍ํ
Gemfile gem 'active_record-postgresql_analyzer', group: :development
Output logfile if sequential scan is detected ------------ find Seq
Scan query ------------ SELECT "todo".* FROM "todo" WHERE "todo"."user_id" = $1 LIMIT 1 QUERY PLAN --------------------------------------------------------------------------------------------- Limit (cost=10000000000.00..10000000001.67 rows=1 width=81) -> Seq Scan on todo (cost=10000000000.00..10000000001.67 rows=1 width=81) Filter: (user_id = 13) (3 rows)
Έ
ActiveSupport::Notifications ActiveRecord::PostgreSQLAnalyzer::LogSubscriber.attach_to :active_record https://github.com/m3dev/ active_record-postgresql_analyzer/ blob/master/lib/active_record/ postgresql_analyzer.rb#L42
Explain ActiveRecord::Base.connection.explain(payload[:sql], payload[:binds]) https://github.com/m3dev/ active_record-postgresql_analyzer/ blob/master/lib/active_record/ postgresql_analyzer.rb#L22
Detect Sequential Scan SELECT "todo".* FROM "todo" WHERE "todo"."user_id" =
$1 LIMIT 1 QUERY PLAN --------------------------------------------------------------------------------------------- Limit (cost=10000000000.00..10000000001.67 rows=1 width=81) -> Seq Scan on todo (cost=10000000000.00..10000000001.67 rows=1 width=81) Filter: (user_id = 13) (3 rows) https://github.com/m3dev/ active_record-postgresql_analyzer/ blob/master/lib/active_record/ postgresql_analyzer.rb#L23
index షΓΕ ࢭ
ActiveRecord::PostgreSQLAnalyzer https://github.com/m3dev/ active_record- postgresql_analyzer
⭐ github.com/ma2gedev/ power_assert_ex
end