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ソーシャルゲームの 高負荷とかじゃない 地味な方の話
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takahiro ogasawara
April 21, 2016
Programming
2.1k
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ソーシャルゲームの 高負荷とかじゃない 地味な方の話
phpblt#4
takahiro ogasawara
April 21, 2016
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Transcript
ιʔγϟϧήʔϜͷ ߴෛՙͱ͔͡Όͳ͍ ຯͳํͷ @ogasora50
ࣗݾհ • খּݪ ۭ(@ogasora50) • cygames αʔόʔαΠυΤϯδχΞ • ࠷ۙɺṖʹ؍༿২ʹ·Δ
ࣗݾհ • খּݪ ۭ(@ogasora50) • cygames αʔόʔαΠυΤϯδχΞ • ࠷ۙɺṖʹ؍༿২ʹ·Δ
• ͋ͬ͞Γӽౙࣦഊ • ੜ໋ʹ A/BςετͳΜͯͳ͍
ιʔγϟϧήʔϜͷ ߴෛՙͱ͔͡Όͳ͍ ຯͳํͷ
όονॲཧͱ͔ σʔλཧͷΛͯ͠Έ·͢
όονॲཧ͕ଟΊ • όονͰͰ͖Δ͜ͱόονͰ • Ͱ͖Δ͚ͩϨεϙϯεΛૣ͍ͨ͘͠ • ϢʔβΞΫηε͕ͳͯ͘ॲཧ͍ͨ͠
όονॲཧͰؾΛ͚͍ͭͯΔࣄ • σʔλ͕૿͑ͯmemory_over͠ͳ͍͔ • ઃఆϛεͳͲͷରࡦ • ෆ۩߹/ো࣌ରԠ • ଐਓԽ͠ͳ͍Α͏࠷ݶͷϧʔϧ/υΩϡϝϯτԽ
memory_overରࡦ • ͍ΘΏΔ • ΄ͲΜͲྻ͕Ͱ͔͗͢Δ/ແବͳྻ࡞Γ͗͢ Fatal error: Allowed memory size
of xxx bytes exhausted
memory_overରࡦ • ඞཁͳͷΛඞཁͳ͚ͩɺখ͚ʹ·ͱΊͯॲཧ͢ΔΑ͏ʹ • ֎෦ϑΝΠϧʹग़ྗɺ͔ͦ͜ΒҰఆͣͭॲཧ • BULK INSERT • INSERT
… ON DIPLICATE KEY UPDATE • ඞͣຊ൪/μϛʔσʔλΛͬͯςετ
ઃఆϛεͳͲͷରࡦ • Ϛελʔσʔλʹϛε͕͋ͬͨΒͲ͏͠Α͏ͳ͍ɾɾɾ • σʔλͷෆ߹͕ͳ͍͔νΣοΫπʔϧΛఆظ࣮ߦ • dry_run࣮ͯ͠ࣄલʹ݁Ռ֬ೝ
ෆ۩߹/ো࣌ରԠ • ෆ۩߹/োʹૉૣ͘ؾ͚Δ͔ɺૉૣ͘ରԠͰ͖Δ͔ • ॲཧͷ൱Λࣾsnsʹ௨ • ແବͳ͙Β͍ͷϩάग़ྗ͕ͪΐ͏Ͳ͍͍ • ్தͰམͪͨͱͯ͠ɺΓ͠/࠶࣮ߦͰ͖ΔΑ͏ʹ
ϧʔϧ/υΩϡϝϯτԽ • ඞͣreadme࡞Δ ࠷ݶͷॲཧ/Ҿͷ֓ཁ͙Β͍ • ಓʹෳਓͰ୲ɺ࡞ۀΛճ͢ • όον͓͡͞Μ࡞Βͳ͍Α͏ʹ
ϧʔϧ/υΩϡϝϯτԽ • ӡ༻͕͘ͳΔʹͭΕɺόον࣮ߦαʔόʔ͕૿͑Δɾɾɾ • phpdocͷcron൛ɺcrondoc࡞ͬͨ • markdownܗࣜͷυΩϡϝϯτੜɺgithub͔Βࢀর 4)&--CJOCBTI 1"5)TCJOCJOVTSTCJOVTSCJO ."*-50SPPU
)0.& !UJUMFNPOEBZTI !BVUIPSIPHF !QBSBNFOW<EFWcTUHcQSPE> TUBSUFWFSZNPOEBZ TIIPNFIPHFIBQQZ@NPOEBZTIQSPE
σʔλཧ
σʔλཧ • ͱʹ͔͘σʔλ͕ͲΜͲΜΓΓ૿͑Δ • ඞཁͳͷΈอ࣋͢ΔΑ͏ʹ
σʔλཧ • ඞཁͳ͘ͳͬͨͷͲΜͲΜύʔδ • ύʔςΟγϣϯΛຖdrop & add • Πϕϯτ୯ҐͰςʔϒϧ࡞ɺΠϕϯτऴྃޙdrop
dropͰ͖ͳ͍ • σʔλྔେ͖͗ͯ͢ɺdrop࣌ʹio_waitͰϨεϙϯε͕ྼԽ • σʔλϑΝΠϧΛΏΔ͔ʹআ͢ΔΑ͏ʹͨ͠Βղܾ 1. ςʔϒϧͷσʔλϑΝΠϧʹϋʔυϦϯΫΛషΔ 2. drop table
3. linuxͷํͷ truncateͰঃʑʹαΠζΛΓ٧Ίremove • drop tableࣗಈԽ
·ͱΊ • όονඞཁͳͷΛඞཁͳ͚ͩɺখ͚ʹ·ͱΊͯॲཧ • ෆ۩߹/ো͕ى͖Δ͜ͱΛఆͨ͠ॲཧΛ • σʔλඞཁ࠷খݶอ࣋͢ΔΑ͏ɺ ύʔςΟγϣϯɺςʔϒϧ୯ҐͰύʔδͰ͖ΔΑ͏ʹ • ڊେͳςʔϒϧΛdrop͢Δࡍɺ
io_wait͕ى͖ͳ͍Α͏ʹΏΔ͔ʹσʔλϑΝΠϧΛআ͢Δ
enjoy engineering!