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Let's Scale Ruby Applications with Love

Avatar for Bernie Chiu Bernie Chiu
July 26, 2019
Technology
4
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Let's Scale Ruby Applications with Love

Avatar for Bernie Chiu

Bernie Chiu

July 26, 2019
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Transcript

  1. LET’S SCALE RUBY APPLICATIONS WITH ❤

  2. WHO AM I ?

  3. None

  4. GitHub: berniechiu Twitter: berniechiu_tw Software Engineer @

  5. OVERVIEW • Ruby and API • Ruby and Database •

    Ruby and Network • Ruby and… just Ruby

  6. WHAT MATTERS?

  7. AVERAGES?

  8. –DHH 「1000 requests that return in 5ms, and 200 requests

    taking 2,000 ms, still get a respectable 170ms average」

  9. Only Very Happy & Very Unhappy Credit from : https://www.youtube.com/watch?v=VPYP7oJJPdo

  10. TUNE YOUR DESIRED METRICS

  11. SO WHAT MATTERS? • Popular endpoints • Slow response times

  12. None

  13. RUBY WEB + API

  14. RESTFUL ENTHUSIASM

  15. None
  16. None
  17. None

  18. EVEN MORE DATA?

  19. • github.com/zdennis/activerecord-import • github.com/jamis/bulk_insert

  20. ALWAYS KNOW WHAT RUNS UNDER RUBY

  21. RUBY DATABASE + PAGINATIONS

  22. None

  23. Performance Impact

  24. For example - Kaminari

  25. None
  26. None
  27. None

  28. KEEPING USER NAVIGATIONS INTACT?

  29. Prefetched Count

  30. None
  31. None
  32. None

  33. ITERATIONS FROM ACTIVERECORD

  34. FIND EACH FIND IN BATCHES • Memory saving • Fetch

    limited rows on each batch/iteration • Won’t lock the whole table

  35. BUT!

  36. WORKING WITH UUID?

  37. None

  38. UUID V4 IS SORTABLE?

  39. Credit from: https://www.postgresql.org/docs/9.6/uuid-ossp.html

  40. Credit From: GitLab CE Custom Implementations

  41. SPEED REGAIN

  42. RUBY LIBRARIES + NETWORK

  43. TYPES OF CACHING

  44. SKIPPING TO…

  45. LOCALLY FETCHED

  46. None
  47. None
  48. None

  49. WAIT…FIXED FOREVER FOR FIXED FOR A PERIOD

  50. None

  51. NO CODE CONNECTION IS FAST CODE

  52. Connection Takes Time

  53. COPE WITH USE CASES

  54. RUBY X THREE

  55. BENCHMARKING

  56. TOOLS FOR PARTIAL CODE https://github.com/evanphx/benchmark-ips https://github.com/jondot/benchmark-ipsa

  57. WHY NOT NATIVE • Only few iterations runs with Benchmark.bm

    or Benchmark.bmbm • Display time factors instead and need to guess a random iteration counts
  58. None
  59. None
  60. None

  61. TEST YOUR THEORY

  62. TEST YOUR THEORY Constantized One Time Calculation

  63. TEST YOUR THEORY

  64. TEST YOUR THEORY

  65. SEQUEL GEM https://github.com/jeremyevans/sequel

  66. EVERYONE CAN CONTRIBUTE

  67. FLAME GRAPHS FROM API

  68. TOOLS?

  69. RACK MINI PROFILER

  70. AN ISSUE?

  71. None
  72. None

  73. HTML

  74. None
  75. None
  76. None
  77. None
  78. None
  79. None

  80. VERIFY!

  81. None

  82. LOAD TEST!

  83. BEWARE! • APIs might have different result in different params

    body • Test with the most common set from online metrics or your own tracking

  84. 調效能就跟洗浴缸⼀一樣，拔掉 那個塞⼦子，⽔水很快就流光了了

  85. HAPPY HACKING

  86. QA