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
障害にすてるところなし
Search
tomoya yokota
March 11, 2017
Technology
4.3k
8
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
障害にすてるところなし
tomoya yokota
March 11, 2017
More Decks by tomoya yokota
See All by tomoya yokota
レガシーソフトウェアを再現性高く置き換える手法 〜「射撃しつつ前進」を支える技術〜
yokotaso
0
140
レガシーSolrの Elasticseach移行 Cybozu Tech Meetup #14
yokotaso
0
490
introduction-to-modern-gc
yokotaso
10
3.3k
product-sutainability
yokotaso
0
370
the-art-of-develop-culture-at-cybozu
yokotaso
0
3.5k
Go-To-Java9
yokotaso
0
250
Other Decks in Technology
See All in Technology
[2026 Oracle Technical Deep Dive] VMwareワークロードのOCI移行実践ガイド - OCVSでの継続利用からOCIコンピュートへの移行まで (2026年9月17日開催)
oracle4engineer
PRO
0
130
Snowflake Horizon Catalog と Apache Iceberg で作る オープンなデータ基盤
kitagawaz
0
440
スキルを作る、その前に!複数人で使われるスキルを 作るためのプロセス
junkifurukawa
2
340
Futexes the good, the bad, the ugly
ennael
PRO
0
130
2026-10-01_MagicPod_QAハーネスエンジニアリングとQA組織の未来像
ynisqa1988
1
540
[2026-09-30]ロックンロールは鳴り止まないっ - 信頼性かまってちゃん - 「データ駆動を投げ捨ててまで。」追いかける信頼性改善に向けた取り組みの話
tosite
0
210
FactoryBotアンチパターン / factory_bot anti-patterns
toshimaru
0
140
メルペイ 会計システム概要と歴史
mewuto
0
170
Incremental HTTP
kazuho
5
2.1k
使いこなすために知っておきたい Azure SRE Agent アンチパターン
torumakabe
2
380
生成AIで高い生産性を求められて、 悩み、乗り越えた話
mot_techtalk
2
130
FinTech 1-2 : Overview of FinTech
ks91
PRO
0
150
Featured
See All Featured
Optimizing for Happiness
mojombo
378
71k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
666
130k
AI in Enterprises - Java and Open Source to the Rescue
ivargrimstad
0
1.5k
What does AI have to do with Human Rights?
axbom
PRO
1
2.4k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
11
1.1k
AI Search: Implications for SEO and How to Move Forward - #ShenzhenSEOConference
aleyda
1
1.4k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
250
1.3M
Getting science done with accelerated Python computing platforms
jacobtomlinson
2
520
Beyond borders and beyond the search box: How to win the global "messy middle" with AI-driven SEO
davidcarrasco
3
270
Designing Dashboards & Data Visualisations in Web Apps
destraynor
232
55k
Marketing to machines
jonoalderson
1
5.9k
HDC tutorial
michielstock
2
940
Transcript
োʹͯ͢Δͱ͜Ζͳ͠ αΠϘζגࣜձࣾ @yokotaso
We’re sorry for …
ӡ༻োͷ • ͝໎Λ͓͔͚ͨ͠Έͳ͞· ͝ΊΜͳ͍͞ • ࢹɾରࡦɾௐࠪɾվળΛʑੋվળ • վળ·ͩ·ͩಓ • αΠϘζΛӬ͘ΑΖ͓͘͠ئ͍͠·͢
ΫϥυͷنͱՔಇ • ͝ܖ͍͍͍ͨͩͯΔձ༷ࣾ 1ສ8ઍࣾ
ӡ༻ো
Boo!
ͦΜͳ͜ͱͳ͍
ŧŔŕŪGOOD
ࣦഊ͔ΒపఈతʹֶͿ োֶश 4
جૅࣝΛ͚ͭΔ
جૅతͳૉཆΛຏ͘ ίϯϐϡʔλͷجૅΛΖ͏
ੜ͖ͨσʔλ͕োʹ͋Δ • ϘτϧωοΫͲ͜ʁ • େنαʔϏεٕज़ೖΛ ࢀর͠ͳ͕Βௐࠪ͢ΔͱษڧʹͳΔ • ϝτϦΫεࢹπʔϧͰ؍͠Α͏ • جૅతͳࣝಎ͕
োௐࠪͷͨͼʹຏ͔ΕΔ
ࣝͱܦݧཌྷΛत͚ͯ͘ΕΔ • ະͷʹग़ձͬͨΒཱͪฦΔॴ • ͍͠΄Ͳղܾͷࢳޱʹ • ҰਓͰௐࠪΛਐΊΒΕΔΑ͏ʹͳͬͨ • ϝτϦΫε͔ΒݪҼΛ༧Ͱ͖ΔΑ͏ʹ
ίϯϐϡʔλʔͷେࣄͳࣄ ো͕ڭ͑ͯ͘Εͨ
ࣝΛਂ۷Γ͢Δ
ಈ࡞ݪཧΛਂ͘ཧղ͢Δ ো࠷ߴͷྑͰ͋Δ
MySQLͷΠϯσοΫε͕͑ͳ͍
খ͞ͳෆ۩߹վम͕ݪҼ • ॏෳআڈͷͨΊʹGROUP BY Λ҆қʹ͚ͭͨͷ͕ݪҼ • JOIN࣌ʹར༻ͨ͠ΠϯσοΫε͕GROUP BY ʹ࠶ར༻Ͱ͖ͳ͍ •
େྔͷϨίʔυʹରͯ͠filesort͕ͬͯྦ
ཧղͨͭ͠Γʹͳͬͯ·ͤΜ͔ • োͷͨͼʹجຊతͳಈ࡞ݪཧΛ֬ೝ • োௐࠪΛ௨ͯ͠ಈ࡞ݪཧͷཧղ͕ਂ·Δ • ಈ࡞ݪཧ͕ਂ͘ཧղͰ͖͍ͯͳ͍ؾ͖ͮ
ো࠷ߴͷྑͰ͋Δ
νʔϜͰڧ͘ͳΔ
ࣦഊΛΏΔ͢จԽ ࣦഊͷڞ༗ஏ͕ͩʹཱͭʂ
Seasar2 S2DAO Ҡߦࣦഊ
͝ΊΜͳ͍͞!͝ΊΜͳ͍͞! • SeasarͷEOLʹ͏Spring FrameworkҠߦ • Seasar S2DAO͔ΒHibernateͷҠߦࣦഊ • ύϑΥʔϚϯεྼԽɺOutOfMemoryError… •
શഊͰ͢ɻ͝໎Λ͓͔͚͠·ͨ͠
ࣦഊΛड͚ೖΕΔจԽ
PostmortemΛॻ͜͏ • Λ٬؍తʹཧ͢ΔͨΊʹ༗༻ • ࣦഊΛੳɾڞ༗ɾࢭ • AWS S3 େنো •
git lab ຊ൪σʔλআ
ࣦഊΛڞ༗Ͱ͖ΔจԽΛ࡞Δ • ࣦഊΛڞ༗ͯ͠܁Γฦ͞ͳ͍จԽΛ࡞Ζ͏ • ࣦഊʹ͍ͭͯޠΔਓͷଘࡏҙٛେ͖͍ • ࣦഊΛڞ༗ͯ͘͠ΕΔਓʹѹతײँ • ݠڏɾଚܟɾ৴པ(HRT) ΛԿ֬ೝ͠Α͏
• ݸਓͷࣦഊͰͳ͍ɺ৫ͷࣦഊͩ
None
ࣦഊޭͷதؒͰ͔͠ͳ͍
సΜͰͨͩͰى͖͕͋Βͳ͍ʂ • ࣦഊͷչ͕͠͞վળʹͭͳ͕Δ • S2Dao͔ΒHibernateͷҠߦࣦഊΛ׆͔ͯ͠ • JDBCTemplateΛར༻ͯ͠࠶ઃܭ • OSSͱͯ͠ެ։༧ఆ
ࣦഊͷڞ༗ஏ͕ͩʹཱͭʂ
Α͜͠·ͳੜ͖ํ
ͣͿͱ͘ੜ͖Δ ੜ͖͍ͯΔ͚ͩͰ·Δ͏͚
Java ṖͷύϑΥʔϚϯεྼԽ
ղܾ͠·ͨ͠ (๑•̀ŷ•́)و✧ • JIT Compiler͕ఀࢭ͢Δέʔε͕͋Δ • JVM͕JIT Compileͨ͠ίʔυΛࣺͯΔ • JIT
Compiler͕෮ؼͤͣɺ࠷దԽͷ͔͔Βͳ͍ Byte CodeΛJava͕࣮ߦ͠ଓ͚Δ • ύϑΥʔϚϯεྼԽΛى͜͢
ղܾͷࢳޱ • GCʹׂΓͯΔThread CPU͔Βܾ·Δ • GCʹׂΓͯΒΕͨThread CPUΛ100%ઐ༗͢Δ
ղܾͷࢳޱ • GCʹΑΔCPUར༻Λߟྀͯ͠༨༟͕͋Δ • Full GCൃੜ͍ͯ͠ͳ͍ • GCΛݪҼ͔Βഉআ • CPUෛՙ্͕͕ΔέʔεΛMLͰಡΈ͋͞Δ
ϒϩάʹެ։
None
͝Ѫಡ͋Γ͕ͱ͏͍͟͝·͢ʂ • ͜ͷهࣄ͚ͩͰ 1ສ5ઍPV • ࠷ऴతʹ 700ͯϒ͘Β͍ • OSS͓ੈʹͳΓͬͺͳ͠ •
ใެ։Ͱߩݙ͍ͨ͠ؾ࣋ͪ
ͣͿͱ͘ੜ͖ΔΑ͏ʹ • ໘ന͍ٕज़هࣄʹͳͬͨΒṶ͚ͷ • ໘ന͍ࣄ͋ͬͨΒ͍͍ͳ͕ϞνϕʔγϣϯʹมԽ • ࠶ىಈͰճආͭͭ͠ظؒɺো͕ൃੜ͍ͯͨ͠ • Θ͔Βͳ͍͍ͯ͘ɾಀ͍͍͛ͯ •
ੜ͖͍ͯΔ͚ͩͰ·Δ͏͚ͷਫ਼ਆ
ௐΔ͚ͩͰ·Δ͏͚ʂ
োֶशɺ͔ͲΓ·͔ͬ
োʹͯ͢Δͱ͜Ζͳ͠