Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
ISUCON7 まとめ
Search
changkita
January 08, 2018
Programming
40
0
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
ISUCON7 まとめ
ISUCON7の予選のまとめ
changkita
January 08, 2018
More Decks by changkita
See All by changkita
仮想通貨こわい
kitah
0
46
強化学習
kitah
0
97
ISUCON5 まとめ
kitah
0
76
Other Decks in Programming
See All in Programming
golang-bob.pdf
iwatsukayura
0
130
Atomic Design, Enforced: Scaling Mobile Design Systems (next.app devCon / droidCon Berlin 2026)
steliosf
PRO
0
170
Starting & Sustaining Code-Based E2E Testing for Non-Coding QA Teams( #jasstniigata )
teyamagu
PRO
1
1k
IBM Bob Dojo #1 仕様駆動開発入門
oniak3ibm
PRO
0
390
自サークルのIdPからログアウトできるようになるまで
taiseiue
1
140
Herb in Rails 8.2: Your ERB views, now HTML-aware @ Kaigi on Rails 2026, Tokyo, Japan
marcoroth
2
220
C#の現在地 進化の歴史と、AI時代の.NET Everywhere
neuecc
5
5.2k
AmebaブログはKMPから卒業します
kmars0605
0
190
[ハンズオン]AIへの指示だけで「五目並べ」を作ってみよう
satoshi256kbyte
1
380
UnityでSystem.Net.WebSocketsなWebSocketサーバが動かないのでUnity Monoのコードを覗いてみた / about implementing websocket server with unity mono
drumath2237
1
610
HTML-in-Canvasで作る未来のWeb UI表現
clockmaker
5
5.1k
Apple Intelligence を用いた個人情報誤送信防止、及びユーザーリクエスト体験の改善について
yukiny
0
350
Featured
See All Featured
Java REST API Framework Comparison - PWX 2021
mraible
34
9.8k
Navigating Team Friction
lara
192
16k
SEOcharity - Dark patterns in SEO and UX: How to avoid them and build a more ethical web
sarafernandez
0
300
The Cost Of JavaScript in 2023
addyosmani
55
10k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
508
140k
The Straight Up "How To Draw Better" Workshop
denniskardys
239
140k
技術選定の審美眼(2025年版) / Understanding the Spiral of Technologies 2025 edition
twada
PRO
120
120k
Agile Actions for Facilitating Distributed Teams - ADO2019
mkilby
0
310
Digital Ethics as a Driver of Design Innovation
axbom
PRO
1
460
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
133
20k
Information Architects: The Missing Link in Design Systems
soysaucechin
1
1.2k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
Transcript
ISUCON7ͷ·ͱΊ νʔϜ ʮத͕গ͍͠ఔԦࠃʯ
ISUCON • Iikanjini Speed Up Contestͷུ • ͓ͱͳΔWebαʔϏεΛܾΊΒΕͨϨΪϡ ϨʔγϣϯͷதͰݶք·ͰߴԽΛਤΔνϡʔ χϯάότϧ
• ࠓճISUCON7ʹࢀՃ͠·ͨ͠
ࠓճͷΞϓϦέʔγϣϯ • νϟοτΞϓϦέʔγϣϯ(ͱ͍͏إΛͯ͠ը ૾৴͕ϘτϧωοΫ) • N+1ը૾ͷΞοϓϩʔυɺ؆୯ͳϦΞ ϧλΠϜཁૉͳͲ • ༧બ͔Βαʔόʔ͕3͋ͬͨ
੩తϑΝΠϧͱը૾ϑΝΠϧͷΩϟογϡ • ݩʑ੩తϑΝΠϧը૾CDNܦ༝ͷΞΫη εͳͷͰ”Cache-Control: public, max- age=3600”Λ͚ΕࣗྗͰ৴͢Δඞཁ ͳ͍ɺͱ͍͏ʹ͢Δ༧ఆͩͬͨΒ͍͠
੩తϑΝΠϧͱը૾ϑΝΠϧͷΩϟογϡ • ϕϯνϚʔΧʔҰఆͷϖʔεͰϢʔβΛ૿ ͢ͷͰɺΩϟογϡ͕ͳ͍ɺ͋Δ͍Ϣʔβʔ ୯ҐͷΩϟογϡͰϢʔβʔʹൺྫͨ͠ μϯϩʔυଳҬ͕ඞཁʹͳΓɺޙ͙͢ʹ ଳҬΛανͬͯ͠·͏ • ανΔ :
saturation()
੩తϑΝΠϧͱը૾ϑΝΠϧͷΩϟογϡ • Ϣʔβʔ͕૿͑ͯμϯϩʔυଳҬΛα νΒͤͳ͍ͨΊʹɺCDNʹΑΔΩϟογϡ ͕ޮ͍͍ͯΔͱ͍͏લఏʹͯ͠Ϣʔβʔ͕ ૿͑ͯը૾1ͭ͋ͨΓͷμϯϩʔυ͕૿ ͑ͳ͍ઃܭ͕ඞཁͩͬͨ
CDN(ίϯςϯπσϦόϦʔωοτϫʔΫ) • ΣϒίϯςϯπΛΠϯλʔωοτͰ৴͢ ΔͨΊʹ࠷దԽ͞ΕͨωοτϫʔΫͷ͜ͱ • αʔόʔΛҰՕॴʹஔ͘ͷͰͳ͘ɺཧతɾ όοΫϘʔϯతʹࢄͤ͞Δ͜ͱͰɺෛՙΛ ݮΒ͢
DBͷը૾σʔλΛϑΝΠϧʹग़ྗ • ը૾DBͷimageςʔϒϧʹೖ͍ͬͯͨͷͰɺ ͦΕΛ੩తϑΝΠϧͱͯ͠ग़ྗ͠ɺnginxͰ৴ ͢Δํ๏͕είΞ্ҐνʔϜͰͱΒΕ͍ͯͨ • ಉ͡༰ͷը૾͕ಉ͡ϑΝΠϧ໊Ͱॏෳొ͞ Ε͓ͯΓɺແବʹDB͔Βͷऔಘ͕ൃੜ͍ͯͨ͠ ͜ΕɺLIMIT 1Λ͚Εେৎ
DBͷը૾σʔλΛϑΝΠϧʹग़ྗ
cache-control • Ϩεϙϯε/ϦΫΤετʹରͯ͠Ωϟογϡͷ ৼΔ͍Λ੍ޚ͢ΔͨΊͷࢦࣔΛࢦఆ͢Δͨ Ίʹར༻͞ΕΔ • ͍͔ʹը૾ΛΩϟογϡͤͯ͞αʔόʔ͔Β σʔλΛฦ͞ͳ͍Α͏ʹ͢Δ͔
εςʔλείʔυ304 (Not Modified) • 3xxϦμΠϨΫτ • 304ະߋ৽Λද͢ • Ωϟογϡͷ༗ޮແޮͷ֬ೝ͖ϦΫΤετ ʹରͯ͠ɺ༗ޮͰ͋Δ߹ʹฦ͢εςʔλε
ίʔυ
cache-control • public • max-age
cache-control • public • ڞ༗Ωϟογϡʹอ࣋ͯ͠ ྑ͍͜ͱΛࢦࣔ͢Δ
ڞ༗Ωϟογϡ • ෳͷϢʔβ͕࠶༻͢ΔͨΊʹϨεϙϯε Λอଘ͢ΔΩϟογϡ
cache-control • max-age • max-age͕1Ҏ্ͷ߹ɺ ͦͷඵΫϥΠΞϯτ ϦΫΤετΛߦΘͳ͍
cache-control • add_header Cache-Control “public, max- age=31536000”; • /js//css/ʹ͍ͭͯಉ༷ʹ
cache-control • immutable : ࢦఆ͢ΔͱΩϟογϡΛ immutable(ෆม)ʹͰ͖ɺϒϥβΩϟογϡ ͕freshͰ͋ΕϦϩʔυ࣌Ͱώοτͤ͞ΔΑ ͏ʹͳΔ • Ϧϩʔυ࿈ൃ͞ΕͯແବͳϦΫΤετΛ͛Δ
• ࠓճ͋·Γؔͳ͔༷ͬͨ
cache-control • etag : Ωϟογϡ͞Ε͍ͯΔίϯϙʔωϯτͷ ༗ޮੑΛݕূ͢ΔΈ • ෳαʔόʔͰetag͕ҰகͤͣʹΩϟογϡ ͕ΘΕΔՄೳੑ͕ۃʹ͘ͳͬͯ͠·͏ •
؆୯ʹճආ͢Δʹetag = off;ͱͯ͠ແޮʹ͠ ͯ͠·͏ͷ͕ྑ͍
Ωϟογϡศར͚ͩͲා͍ • ϑϦϚΞϓϦ͕CDNͷ༻ѲΛؒҧ͑ͨ ͨΊɺձһใΛCDNʹΩϟογϡͯ͠͠· ͍ɺݸਓใ͕࿙Ӯͨ͠ • “private”Ͱͳ͘ɺ“no-cache”Λͬͨͨ Ίɺϖʔδ͕Ωϟογϡ͞Εͯ͠·͍ͬͯͨ
cache-control
GET /fetchͱGET /message • ΤϥʔλΠϜΞτ͕ͳ͍߹ɺຖඵ৽ن Ϣʔβʔ͕ొͯ͘͠Δ • ϝοηʔδͷߘϢʔβʔʹൺྫ͢Δ ͕ɺड৴2ʹൺྫ͢Δ •
ϘτϧωοΫΛ௵ͯ͠ϝοηʔδͷྲྀྔΛ্ ͍͚͛ͯείΞ͕͕͋ΔઃܭΒ͍͠
GET /fetchͱGET /message • “GET /fetch”ʹείΞ͕ͳ͘ɺ ”GET /message”ʹड৴ϝοηʔδʹՃ ࢉ͞ΕΔͱ͜Ζ͕ϙΠϯτ
GET /fetchͱGET /message • ΫϥΠΞϯτ”GET /fetch”ΛϙʔϦϯά͍ͯ͠ ͯɺӾཡதͷνϟϯωϧʹ৽ணϝοηʔδ͕͋ Δͱ”GET /message”ΛݺΜͰ৽ணϝοηʔδΛ ड৴͢Δ
• “GET /fetch”ͷϨεϙϯεΛ͍͘Βվળͯ͠ɺ ৽ணϝοηʔδ͕ͳ͍ͱείΞ্͕Βͳ͍
GET /fetchͱGET /message • Ӿཡதͷνϟϯωϧʹ৽ணϝοηʔδ͕1݅͋ Δঢ়ଶͰ͙͢ʹฦͯ͠ɺ”GET /message”Ͱ 1ͱͦ͜ʹؚ·ΕΔ1ϝοηʔδͷ1Ͱ̼ 2ϦΫΤετͰ2͔͠Ք͛ͳ͍
GET /fetchͱGET /message • “GET /fetch”ΛλΠϜΞτʹͳΒͳ͍ൣғͰ Θ͟ͱͯͭ͘͜͠ͱͰɺ”GET /message” 1ϦΫΤετͰे݅ͷϝοηʔδΛऔಘͰ ͖ΔΑ͏ʹͳΓɺ2ϦΫΤετͰेՔ͛Δ
Α͏ʹͳΔ
GET /fetchͱGET /message • “GET /fetch”ͱ”GET /message”N+1ΫΤϦ COUNTΫΤϦͳͲॏ͍ͨॲཧ • ୯ʹॲཧΛܰ͘͢Δ͚ͩͰͳ͘ɺແବʹݟ
͑Δ”sleep”ͷҙຯʹؾ͍͍ͮͯΕείΞ Ξοϓʹͭͳ͕͍ͬͯͨ
ল • ͬͱϨΪϡϨʔγϣϯΛख़ಡ͢Δඞཁ͕͋ͬ ͨ • ϓϩϑΝΠϦϯάπʔϧΛงғؾͰ͍ͬͯͨײ ͕͋ͬͨ • ͦͦͷࣝෆ •
͕Կͯ͠ͳ͍(ϩάͱ͔͔͠ݟͯͳ͍)
དྷʹ͚ͯ • աڈͷISUCONͰͷେࣄͳϙΠϯτΛ͔ͬ͠ Γͱԡ͑͞ɺʮ͋ͬʂ͜ΕνϟϨϯ̋Ͱͬ ͨͭͩʯతͳࢥ͍ग़͕͠Ͱ͖ΔΑ͏ʹͨ͠ ͍ • ࣌ؒ͋Γͦ͏ͳͷͰΏͬ͘ΓࣝΛ͑ͨ ͍