ISUCON夏期講習2017 実践編 / isucon summer school 2

Transcript

1. ISUCON Նظߨश 2017
   ࣮ફฤ
   2017.08.25
   @fujiwara
   

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2. @fujiwara
   @mackee_w (ISUCON2,3ຊબग़৔)
   ٕज़෦
   

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3. ͜Ε͔Βͷ࣮श
   ISUCON 6 ༧બ໰୊(Ұ෦վม൛) Λମݧ͍͖ͯͨͩ͠·͢
   ࡢ೥ͷ༧બͱͷ૬ҧ఺
   Ϛγϯ͕ 2ίΞ → 3ίΞ
   ϕϯν͕ϦϞʔτͰ͸ͳ͘ϩʔΧϧ
   Go ൛ΛҰ෦վม
   (είΞ͸༧બͱൺֱͰ͖ͳ͍ͷͰ஫ҙ)
   

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4. ISUCON 7 ༧બʹ͍ͭͯ
   ͘͞ΒͷΫϥ΢υͰ։࠵
   ӡӦ͕αʔόʔΛ༻ҙ͢Δ(ࣗ෼Ͱىಈ͠ͳ͍)
   աڈͷ༧બ͸શͯࣗ෼ͰΠϯελϯεΛىಈ͍ͯͨ͠
   ͭ·Γࠓ೔ͱಉ͡งғؾͷ͸ͣ1
   1 ͨͩ͠ϕϯνϚʔΫ͸͓ͦΒ͘ϦϞʔτͩͱࢥΘΕ·͢
   

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5. ϨΪϡϨʔγϣϯΛख़ಡ͢Δ
   ϨΪϡϨʔγϣϯ͸ຖճҟͳΔ
   ࣄલࠂ஌͞ΕΔ಺༰ʴ౰೔ެ։͞ΕΔৄࡉ
   είΞͷܭࢉํ๏ɾSuccess/Fail ͷ൑ఆ৚݅
   ڐՄ͞ΕΔ͜ͱɾ͞Εͳ͍͜ͱ
   աڈʹ͸
   ʮϒϥ΢βͰදࣔͨ͠ࡍͷݟͨ໨Λมߋ͠ͳ͍ʯ
   ͱ͍͏߲໨΋
   

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6. ·ͣαʔόʹ ssh ϩάΠϯ
   ssh -l ubuntu [֤ࣗͷαʔόͷIPΞυϨε]
   ύεϫʔυͱެ։伴͸ࣗ༝ʹมߋ͍ͯͩ͘͠͞
   ͦͷޙͷૢ࡞͸جຊతʹ isucon ϢʔβʔͰߦ͍·͢
   $ sudo su - isucon
   

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7. γεςϜΛ೺Ѳ͢Δ
   ϒϥ΢βͰ http://[֤ࣗͷαʔόͷIPΞυϨε]/ ʹΞΫηε
   ΞϓϦέʔγϣϯΛ೺Ѳ
   αʔόͰ pstree ΍ ps auxwf ౳Λ࣮ߦͯ͠
   ಈ͍͍ͯΔϓϩηεΛ֬ೝ͢Δ
   Կͷ daemon ΍ϛυϧ΢ΣΞͰߏ੒͞ΕͯΔ͔Λ೺Ѳ
   

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8. αʔόΛ͍͡Δલʹ
   ࣮֬ʹ໭ΕΔΑ͏ʹ͓ͯ͘͠
   աڈͷ༧બͰ͸αʔόΛॳظঢ়ଶͰىಈ͠௚͕ͤͨ…
   ࠓճͷ༧બͱաڈͷຊબͰ͸αʔόΛյͨ͠Βͦ͜Ͱऴྃ
   ϨΪϡϨʔγϣϯΛख़ಡ͢Δ͜ͱ(େࣄͳ͜ͱͳͷͰೋճ)
   ISUCON 3 ຊબͰ͸αʔό্ͷը૾ϑΝΠϧΛࣦ͏ͱͦ͜Ͱશ
   ͕ͯऴΘΓ·ͨ͠
   

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9. Git ౳Ͱ؅ཧ͠Α͏
   ΞϓϦέʔγϣϯ͕഑ஔ͞Ε͍ͯΔ /home/isucon/webapp
   → ڞಉ࡞ۀͷ৔߹ɺGitHub ΍ BitBucket ͷϓϥΠϕʔτ
   repoʹpush͢Δͷ͕͓קΊ2
   OSɺϛυϧ΢ΣΞͷઃఆϑΝΠϧ͕͋Δ /etc ΋(rootͰ)
   $ git init
   $ git add .
   $ git commit -m "first commit"
   2 ࣮ࡍͷ༧બɺຊબͰ͸ڝٕதʹrepoΛެ։ͯ͠͠·͏ͱࣦ֨ʹͳΔͷͰ஫ҙ
   

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10. ϕϯνΛֻ͚ͯΈΑ͏
    ॳظ࣮૷͸ Perl
    $ cd /home/isucon/isucon6q
    $ sudo ./isucon6q-bench
    2017/08/24 17:58:01 start pre-checking
    2017/08/24 17:58:19 pre-check finished and start main benchmarking
    2017/08/24 17:59:01 benchmarking finished
    {"pass":true,"score":0,"success":386,"fail":39,"messages":[
    "ϦΫΤετ͕λΠϜΞ΢τ͠·ͨ͠ (GET /)",
    "ϦΫΤετ͕λΠϜΞ΢τ͠·ͨ͠ (POST /keyword)",
    "ϦΫΤετ͕λΠϜΞ΢τ͠·ͨ͠ (POST /login)",
    "ϦΫΤετ͕λΠϜΞ΢τ͠·ͨ͠ (POST /stars)"]}
    

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11. ࣗ෼ͷ࢖͏ݴޠͷ࣮૷ʹ੾Γସ͑ͯϕϯνͯ͠ΈΑ͏
    $ sudo -s
    # systemctl stop isuda.perl
    # systemctl stop isutar.perl
    # systemctl start isuda.XXX
    # systemctl start isutar.XXX
    # journalctl -f
    XXX ͸ go js perl php python ruby scala ͷ͍ͣΕ͔
    

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12. ϕϯνΛֻ͚ͳ͕Βαʔόͷ༷ࢠΛݟΑ͏
    top
    htop
    dstat -t -a
    glances
    

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13. netdata - https://my-netdata.io
    # bash <(curl -Ss https://my-netdata.io/kickstart-static64.sh)
    ϒϥ΢βͰ http://αʔόͷΞυϨε:19999/ ʹΞΫηε
    

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14. ϘτϧωοΫΛݟ͚ͭΔ
    

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15. ʮਪଌ͢ΔͳܭଌͤΑʯ
    Ͳ͕͜ϘτϧωοΫͳͷ͔Λ͸͖ͬΓͤ͞Δ·Ͱ͸ɺਪଌΛߦ
    ͬͨΓɺεϐʔυϋοΫΛͯ͠͸ͳΒͳ͍ɻ
    ܭଌ͢΂͠ɻܭଌ͢Δ·Ͱ͸଎౓ͷͨΊͷௐ੔Λͯ͠͸ͳΒͳ
    ͍ɻ3
    Robert C. Pike
    3 https://ja.wikipedia.org/wiki/UNIX%E5%93%B2%E5%AD%A6
    

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16. alpͰΞΫηεϩάΛղੳͯ͠ΈΑ͏
    github.com/tkuchiki/alp Access Log Profiler
    releases ͔Β alp_linux_amd64.zip Λμ΢ϯϩʔυͯ͠ల։
    wget https://github.com/tkuchiki/alp/releases/download/v0.3.1/alp_linux_amd64.zip
    unzip alp_linux_amd64.zip
    sudo install ./alp /usr/local/bin
    

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17. nginx.conf ʹ alp ༻ͷग़ྗΛઃఆ
    http { ͷͱ͜Ζʹ௥هͯ͠
    log_format ltsv "time:$time_local"
    "\thost:$remote_addr"
    "\tforwardedfor:$http_x_forwarded_for"
    "\treq:$request"
    "\tstatus:$status"
    "\tmethod:$request_method"
    "\turi:$request_uri"
    "\tsize:$body_bytes_sent"
    "\treferer:$http_referer"
    "\tua:$http_user_agent"
    "\treqtime:$request_time"
    "\tcache:$upstream_http_x_cache"
    "\truntime:$upstream_http_x_runtime"
    "\tapptime:$upstream_response_time"
    "\tvhost:$host";
    access_log /var/log/nginx/access.log ltsv;
    # rm /var/log/nginx/access.log && systemctl reload nginx
    

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18. ϕϯνΛ·Θͨ͋͠ͱʹ alp Ͱղੳ
    $ alp --sum -r -f /var/log/nginx/access.log --aggregates='/keyword/.*'
    +-------+-------+--------+---------+--------+-------+--------+--------+--------+------------+------------+-------------+------------+--------+-----------------------------------+
    | COUNT | MIN | MAX | SUM | AVG | P1 | P50 | P99 | STDDEV | MIN(BODY) | MAX(BODY) | SUM(BODY) | AVG(BODY) | METHOD | URI |
    +-------+-------+--------+---------+--------+-------+--------+--------+--------+------------+------------+-------------+------------+--------+-----------------------------------+
    | 31 | 1.113 | 15.001 | 323.588 | 10.438 | 1.113 | 11.023 | 15.001 | 3.934 | 0.000 | 87485.000 | 972130.000 | 31359.032 | GET | / |
    | 84 | 0.001 | 10.408 | 182.531 | 2.173 | 0.001 | 1.241 | 10.406 | 2.825 | 106015.000 | 106015.000 | 8905260.000 | 106015.000 | GET | /css/bootstrap.min.css |
    | 53 | 0.012 | 3.009 | 109.075 | 2.058 | 0.012 | 2.999 | 3.009 | 1.270 | 0.000 | 335.000 | 775.000 | 14.623 | POST | /login |
    | 26 | 1.036 | 10.929 | 98.640 | 3.794 | 1.036 | 3.674 | 9.501 | 2.392 | 2247.000 | 49197.000 | 172511.000 | 6635.038 | GET | /keyword/.* |
    | 42 | 0.001 | 10.399 | 91.376 | 2.176 | 0.001 | 1.250 | 10.188 | 2.823 | 86351.000 | 86351.000 | 3626742.000 | 86351.000 | GET | /js/jquery.min.js |
    | 42 | 0.000 | 10.400 | 91.264 | 2.173 | 0.000 | 1.248 | 10.189 | 2.823 | 16849.000 | 16849.000 | 707658.000 | 16849.000 | GET | /css/bootstrap-responsive.min.css |
    | 42 | 0.001 | 10.409 | 91.132 | 2.170 | 0.001 | 1.223 | 10.210 | 2.828 | 1092.000 | 1092.000 | 45864.000 | 1092.000 | GET | /favicon.ico |
    | 42 | 0.001 | 10.399 | 90.840 | 2.163 | 0.001 | 1.137 | 10.184 | 2.825 | 28631.000 | 28631.000 | 1202502.000 | 28631.000 | GET | /js/bootstrap.min.js |
    | 42 | 0.001 | 10.398 | 90.706 | 2.160 | 0.001 | 1.132 | 10.180 | 2.826 | 93.000 | 93.000 | 3906.000 | 93.000 | GET | /img/star.gif |
    | 14 | 0.176 | 3.001 | 24.694 | 1.764 | 0.176 | 1.545 | 3.001 | 1.061 | 0.000 | 331.000 | 1023.000 | 73.071 | POST | /keyword |
    | 13 | 0.004 | 3.001 | 12.114 | 0.932 | 0.004 | 0.461 | 3.001 | 1.017 | 0.000 | 335.000 | 585.000 | 45.000 | POST | /stars |
    | 2 | 0.004 | 6.611 | 6.615 | 3.307 | 0.004 | 0.004 | 0.004 | 3.304 | 5.000 | 5.000 | 10.000 | 5.000 | GET | /logout |
    | 2 | 0.027 | 0.044 | 0.071 | 0.035 | 0.027 | 0.027 | 0.027 | 0.008 | 25.000 | 25.000 | 50.000 | 25.000 | GET | /initialize |
    +-------+-------+--------+---------+--------+-------+--------+--------+--------+------------+------------+-------------+------------+--------+-----------------------------------+
    

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19. ੩తϑΝΠϧ͕ॏͦ͏ͳͷͰ nginx Ͱ഑ͬͯΈΔ?
    location / { ͷલʹԼهΛ͍Εͯ
    location ~ ^/(img|css|js|favicon.ico) {
    root /home/isucon/webapp/public;
    }
    # rm /var/log/nginx/access.log && systemctl reload nginx
    4
    ΋͏Ұճϕϯνͯ͠ alp Ͱղੳ
    4 ϩάΛফͨ͘͠ͳ͚Ε͹ mv Ͱอଘ
    

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20. Ͳ͏ͳΓ·͔ͨ͠?
    

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21. ੩తϑΝΠϧ͸଎͘ͳ͚ͬͨͲ…
    +-------+-------+--------+---------+--------+-------+--------+--------+--------+------------+------------+-------------+------------+--------+-----------------------------------+
    | COUNT | MIN | MAX | SUM | AVG | P1 | P50 | P99 | STDDEV | MIN(BODY) | MAX(BODY) | SUM(BODY) | AVG(BODY) | METHOD | URI |
    +-------+-------+--------+---------+--------+-------+--------+--------+--------+------------+------------+-------------+------------+--------+-----------------------------------+
    | 29 | 1.632 | 15.001 | 310.129 | 10.694 | 1.632 | 11.513 | 15.000 | 4.038 | 0.000 | 54728.000 | 939499.000 | 32396.517 | GET | / |
    | 36 | 0.586 | 12.471 | 197.041 | 5.473 | 0.586 | 3.888 | 12.417 | 4.025 | 2130.000 | 83098.000 | 315071.000 | 8751.972 | GET | /keyword/.* |
    | 63 | 0.002 | 3.000 | 132.119 | 2.097 | 0.002 | 2.418 | 3.000 | 1.157 | 5.000 | 335.000 | 1160.000 | 18.413 | POST | /login |
    | 22 | 0.216 | 3.001 | 48.918 | 2.224 | 0.216 | 2.629 | 3.001 | 0.951 | 0.000 | 331.000 | 1038.000 | 47.182 | POST | /keyword |
    | 21 | 0.004 | 3.001 | 24.217 | 1.153 | 0.004 | 0.582 | 3.001 | 1.020 | 0.000 | 335.000 | 735.000 | 35.000 | POST | /stars |
    | 3 | 0.001 | 1.962 | 1.970 | 0.657 | 0.001 | 0.001 | 0.007 | 0.923 | 5.000 | 5.000 | 15.000 | 5.000 | GET | /logout |
    | 1 | 0.130 | 0.130 | 0.130 | 0.130 | 0.130 | 0.130 | 0.130 | 0.000 | 25.000 | 25.000 | 25.000 | 25.000 | GET | /initialize |
    | 43 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 28631.000 | 28631.000 | 1231133.000 | 28631.000 | GET | /js/bootstrap.min.js |
    | 43 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 16849.000 | 16849.000 | 724507.000 | 16849.000 | GET | /css/bootstrap-responsive.min.css |
    | 43 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 86351.000 | 86351.000 | 3713093.000 | 86351.000 | GET | /js/jquery.min.js |
    | 43 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 1092.000 | 1092.000 | 46956.000 | 1092.000 | GET | /favicon.ico |
    | 43 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 93.000 | 93.000 | 3999.000 | 93.000 | GET | /img/star.gif |
    | 86 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 106015.000 | 106015.000 | 9117290.000 | 106015.000 | GET | /css/bootstrap.min.css |
    +-------+-------+--------+---------+--------+-------+--------+--------+--------+------------+------------+-------------+------------+--------+-----------------------------------+
    είΞ͸େࠩͳ͍͸ͣ
    ͭ·Γ੩తϑΝΠϧ͸ϘτϧωοΫͰ͸ͳ͔ͬͨ(ݱ࣌఺Ͱ͸)
    

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22. MySQLͷΫΤϦΛղੳ͠Α͏
    /etc/mysql/my.cnf
    [mysqld]
    slow_query_log = 1
    slow_query_log_file = /var/log/mysql/slow.log
    long_query_time = 0 # શͯͷΫΤϦΛग़ྗ
    # systemctl restart mysql
    # systemctl restart isuda.XXX
    # systemctl restart isutar.XXX
    ΞϓϦ΋࠶ىಈ͠ͳ͍ͱDB઀ଓ͕੾ΕͯΤϥʔͷݪҼʹ
    

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23. ͦΖͦΖ࠶ىಈ͕໘౗ʹͳ͖ͬͯ·ͨ͠Ͷ
    ҰൃͰͰ͖Δ shell script ΍ Makefile Λ༻ҙ͠·͠ΐ͏
    #!/bin/sh
    set -e
    now=`date +%Y%m%d-%H%M%S`
    mv /var/log/nginx/access.log /var/log/nginx/access.log.$now # nginxͷϩάΛϩʔςʔτ
    systemctl reload nginx
    mv /var/log/mysql/slow.log /var/log/mysql/slow.log.$now # mysqlͷslowlogΛϩʔςʔτ
    mysqladmin -uisucon -pisucon flush-logs
    # ΞϓϦέʔγϣϯͷ࠶ىಈ
    systemctl restart isuda.XXX
    systemctl restart isutar.XXX
    # Τϥʔ͕ग़ͯͳ͍͔ϩάΛݟΔ
    journalctl -f
    

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24. MySQL ͷ slow log
    # Time: 2017-08-24T10:18:22.683713Z
    # User@Host: isucon[isucon] @ localhost [] Id: 4
    # Query_time: 0.160908 Lock_time: 0.000241 Rows_sent: 7110 Rows_examined: 14220
    SET timestamp=1503569902;
    /* /home/isucon/webapp/perl/lib/Isuda/Web.pm line 235 */
    SELECT * FROM entry ORDER BY CHARACTER_LENGTH(keyword) DESC;
    Query_time: ΫΤϦ࣮ߦʹֻ͔ͬͨ࣌ؒ
    Rows_sent: ΫϥΠΞϯτ(ΞϓϦ)ʹૹ৴ͨ͠ߦ਺
    Rows_examined: ࣮ߦ͢ΔͨΊʹ಺෦ͰಡΈऔͬͨߦ਺
    

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25. MySQL ͷ slow log Λղੳ
    # mysqldumpslow /var/log/mysql/slow.log
    Reading mysql slow query log from /var/log/mysql/slow.log
    Count: 11 Time=0.12s (1s) Lock=0.00s (0s) Rows=7110.0 (78210), isucon[isucon]@localhost
    /* /home/isucon/webapp/perl/lib/Isuda/Web.pm line N */ SELECT * FROM entry ORDER BY CHARACTER_LENGTH(keyword) DESC
    Count: 2 Time=0.02s (0s) Lock=0.00s (0s) Rows=10.0 (20), isucon[isucon]@localhost
    /* /home/isucon/webapp/perl/lib/Isuda/Web.pm line N */ SELECT * FROM entry
    ORDER BY updated_at DESC
    LIMIT N
    OFFSET N
    Count: 1 Time=0.00s (0s) Lock=0.00s (0s) Rows=1.0 (1), isucon[isucon]@localhost
    /* /home/isucon/webapp/perl/lib/Isuda/Web.pm line N */ SELECT COUNT(*) FROM entry
    

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26. pt-query-digest Ͱղੳ
    Percona Toolkit
    www.percona.com/software/database-tools/percona-toolkit
    # wget https://www.percona.com/downloads/percona-toolkit/3.0.4/binary/debian/xenial/x86_64/percona-toolkit_3.0.4-1.xenial_amd64.deb
    # apt install libdbd-mysql-perl libdbi-perl libio-socket-ssl-perl libnet-ssleay-perl
    # dpkg -i percona-toolkit_3.0.4-1.xenial_amd64.deb
    pt-query-digest --limit 10 /var/log/mysql/slow.log
    

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27. ѹ౗తʹ࣌ؒΛ৯͍ͬͯΔΫΤϦ
    # Profile
    # Rank Query ID Response time Calls R/Call V/M Item
    # ==== ================== ============= ===== ====== ===== ===============
    # 1 0x6C987DBB94BEC091 36.1491 96.3% 202 0.1790 0.04 SELECT entry
    # 2 0x28FC5B5D583E2DA6 0.3160 0.8% 186 0.0017 0.00 SHOW GLOBAL STATUS
    # 3 0x0C85264D3C24C18B 0.3030 0.8% 19 0.0159 0.00 SELECT entry
    # 4 0x6FF06CCB4B4E1FAC 0.2020 0.5% 10 0.0202 0.01 INSERT UPDATE entry
    # 5 0x813031B8BBC3B329 0.1380 0.4% 372 0.0004 0.00 COMMIT
    (ུ)
    # Query 1: 2.27 QPS, 0.41x concurrency, ID 0x6C987DBB94BEC091 at byte 54680
    SELECT * FROM entry ORDER BY
    CHARACTER_LENGTH(keyword) DESC
    

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28. ໰୊ͷΫΤϦ͕Ͳ͔͜Βൃߦ͞ΕͯΔ͔
    ιʔείʔυͰ֬ೝ͠·͠ΐ͏
    ͪͳΈʹ Perl ͩͱΫΤϦίϝϯτ͕ຒ·͍ͬͯΔͷͰҰܸ
    /* /home/isucon/webapp/perl/lib/Isuda/Web.pm line 235 */
    SELECT * FROM entry ORDER BY CHARACTER_LENGTH(keyword) DESC;
    DBIx::Sunny by kazeburo
    

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29. htmlify()
    ΤϯτϦ಺༰Λը໘ʹදࣔ͢ΔͨΊͷHTMLΛੜ੒͢Δؔ਺
    ͜ͷதͰྫͷΫΤϦ͕ݺ͹Ε͍ͯΔ
    ͞ΒʹτοϓϖʔδͰ͸ϧʔϓ಺Ͱݺ͹Ε͍ͯΔʂ
    ॲཧΛಡΉͱɺ࣮͸͜ͷΫΤϦ͸ SELECT * Ͱ͸ͳ͘
    SELECT keyword Ͱे෼
    

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30. ແବͳΧϥϜΛSELECT͢Δͱ஗͍
    ໿20ഒ
    # Query_time: 0.018891 Lock_time: 0.000156 Rows_sent: 7108 Rows_examined: 14216
    SELECT keyword FROM entry ORDER BY CHARACTER_LENGTH(keyword) DESC;
    # Query_time: 0.373342 Lock_time: 0.000047 Rows_sent: 7108 Rows_examined: 14216
    SELECT * FROM entry ORDER BY CHARACTER_LENGTH(keyword) DESC;
    

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31. EXPLAIN ͯ͠ΈΔ
    mysql> EXPLAIN SELECT keyword FROM entry ORDER BY CHARACTER_LENGTH(keyword) DESC;
    +----+-------------+-------+------------+-------+---------------+---------+---------+------+------+----------+-----------------------------+
    | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
    +----+-------------+-------+------------+-------+---------------+---------+---------+------+------+----------+-----------------------------+
    | 1 | SIMPLE | entry | NULL | index | NULL | keyword | 767 | NULL | 5022 | 100.00 | Using index; Using filesort |
    +----+-------------+-------+------------+-------+---------------+---------+---------+------+------+----------+-----------------------------+
    1 row in set, 1 warning (0.00 sec)
    mysql> EXPLAIN SELECT * FROM entry ORDER BY CHARACTER_LENGTH(keyword) DESC;
    +----+-------------+-------+------------+------+---------------+------+---------+------+------+----------+----------------+
    | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
    +----+-------------+-------+------------+------+---------------+------+---------+------+------+----------+----------------+
    | 1 | SIMPLE | entry | NULL | ALL | NULL | NULL | NULL | NULL | 5022 | 100.00 | Using filesort |
    +----+-------------+-------+------------+------+---------------+------+---------+------+------+----------+----------------+
    1 row in set, 1 warning (0.00 sec)
    SELECT keyword ͸ Using Index
    ͭ·Γ Index Λݕࡧ͢Δ͚ͩͰΫΤϦ͕׬ྃ͢ΔͷͰ଎͍
    

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32. ΫΤϦΛม͑ͯϕϯνͯ͠ΈΑ͏
    SELECT * Λ SELECT keyword ʹมߋ͢Δ͚ͩ 5
    ΞϓϦͷ࠶ىಈΛ๨Εͣʹ
    5 Go, Scala ͷਓ͸ίʔυ΋গ͠ௐ੔͕ඞཁͰ͢
    

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33. Ͳ͏ͳΓ·͔ͨ͠ʁ
    ...score 0 ͷਓ͸ score Ͱ͸ͳ͘ success ͷ஋Λൺֱͯ͘͠
    ͍ͩ͞
    

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34. ΍͍͖ͬͯ·͠ΐ͏ !
    

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35. (͓·͚) ISUCON ͷ܏޲ͱରࡦ
    ISUCON ͸աڈͱಉ͡ύλʔϯͷ໰୊͸ग़ͮ͠Β͍
    (ग़୊ऀͷ৺ཧ)
    ݱࡏͷٕज़τϨϯυΛऔΓࠐΉ܏޲͕͋Δ
    ISUCON 5 ༧બ: systemd
    ISUCON 5 ຊબ: Microservices, https
    ISUCON 6 ༧બ: Microservices
    ISUCON 6 ຊબ: React SSR, Docker, https
    ISUCON 7 ???
    

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