Redis-Sampler：深入了解你的Redis存储

三里屯摇滚

Redis-Sampler：深入了解你的Redis存储

redis-sampler 是Redis作者@antirez 同学开发的一个ruby 小工具，用于对Redis存储概况进行抽样检测并给出分析结果。

项目地址：https://github.com/antirez/redis-sampler

使用方式：

下载源码，执行下面命令：

./redis-sampler.rb
  host，port和db三个参数都不用解释（db默认为0），samplesize 就是这个抽样检测的样本数量。脚本输出如下例：

Sampling localhost:6379 DB:4 with 1000000 RANDOMKEYS

TYPES
=====

1. zset: 873268 (87.33%)    string: 124995 (12.50%)  set: 1022 (0.10%)
   
2. hash: 576 (0.06%)        list: 139 (0.01%)      
   
3. 
   
4. STRINGS, SIZE OF VALUES
   
5. =======================
   
6. 6: 61222 (48.98%)        7: 17056 (13.65%)        13: 8274 (6.62%)
   
7. 15: 7991 (6.39%)         5: 4629 (3.70%)          31: 3263 (2.61%)
   
8. 20: 2670 (2.14%)         2: 2518 (2.01%)          27: 1675 (1.34%)
   
9. 42: 1270 (1.02%)         159: 893 (0.71%)         1: 705 (0.56%)
   
10. 47: 641 (0.51%)          34: 594 (0.48%)          41: 521 (0.42%)
    
11. 38: 493 (0.39%)          28: 413 (0.33%)          22: 406 (0.32%)
    
12. 139: 351 (0.28%)         29: 343 (0.27%)          83: 337 (0.27%)
    
13. (suppressed 172 items with perc < 0.5% for a total of 6.98%)
    
14. Average: 15.97 Standard Deviation: 26.52
    
15. Min: 0 Max: 1123
    
16. 
    
17. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
    
18. <= 8: 82913 (66.33%)     <= 16: 16789 (13.43%)    <= 32: 9571 (7.66%)
    
19. <= 64: 6232 (4.99%)      <= 128: 3333 (2.67%)     <= 256: 2682 (2.15%)
    
20. <= 2: 2518 (2.01%)       <= 1: 740 (0.59%)        <= 4: 199 (0.16%)
    
21. <= 512: 14 (0.01%)       <= 1024: 3 (0.00%)       <= 2048: 1 (0.00%)      
    
22. 
    
23. LISTS, NUMBER OF ELEMENTS
    
24. =========================
    
25. 2: 28 (20.14%)           5: 18 (12.95%)           9: 10 (7.19%)
    
26. 8: 9 (6.47%)             11: 9 (6.47%)            13: 7 (5.04%)
    
27. 12: 7 (5.04%)            14: 6 (4.32%)            15: 6 (4.32%)
    
28. 4: 4 (2.88%)             16: 4 (2.88%)            21: 4 (2.88%)
    
29. 27: 3 (2.16%)            7: 3 (2.16%)             10: 3 (2.16%)
    
30. 19: 2 (1.44%)            1: 2 (1.44%)             25: 2 (1.44%)
    
31. 41: 1 (0.72%)            3: 1 (0.72%)             17: 1 (0.72%)
    
32. (suppressed 9 items with perc < 0.5% for a total of 6.47%)
    
33. Average: 10.58 Standard Deviation: 8.58
    
34. Min: 1 Max: 42
    
35. 
    
36. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
    
37. <= 16: 52 (37.41%)       <= 8: 30 (21.58%)        <= 2: 28 (20.14%)
    
38. <= 32: 17 (12.23%)       <= 64: 5 (3.60%)         <= 4: 5 (3.60%)
    
39. <= 1: 2 (1.44%)         
    
40. 
    
41. LISTS, SIZE OF ELEMENTS
    
42. =======================
    
43. 7: 106 (76.26%)          6: 33 (23.74%)
    
44. Average: 6.76 Standard Deviation: 0.43
    
45. Min: 6 Max: 7
    
46. 
    
47. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
    
48. <= 8: 139 (100.00%)     
    
49. 
    
50. SETS, NUMBER OF ELEMENTS
    
51. ========================
    
52. 1: 216361 (24.78%)       2: 106871 (12.24%)       3: 67648 (7.75%)
    
53. 4: 48207 (5.52%)         5: 36085 (4.13%)         6: 29597 (3.39%)
    
54. 7: 23765 (2.72%)         8: 22549 (2.58%)         9: 20143 (2.31%)
    
55. 10: 18069 (2.07%)        11: 16387 (1.88%)        12: 15009 (1.72%)
    
56. 13: 13869 (1.59%)        14: 12683 (1.45%)        15: 12319 (1.41%)
    
57. 16: 10794 (1.24%)        17: 10068 (1.15%)        18: 8925 (1.02%)
    
58. 19: 8007 (0.92%)         20: 7618 (0.87%)         22: 7240 (0.83%)
    
59. 21: 7055 (0.81%)         23: 5973 (0.68%)         24: 5771 (0.66%)
    
60. 25: 4934 (0.57%)
    
61. (suppressed 2061 items with perc < 0.5% for a total of 15.72%)
    
62. Average: 1.24 Standard Deviation: 2.34
    
63. Min: 1 Max: 62
    
64. 
    
65. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
    
66. <= 1: 975 (95.40%)       <= 2: 21 (2.05%)         <= 8: 10 (0.98%)
    
67. <= 4: 9 (0.88%)          <= 16: 5 (0.49%)         <= 32: 1 (0.10%)
    
68. <= 64: 1 (0.10%)        
    
69. 
    
70. SETS, SIZE OF ELEMENTS
    
71. ======================
    
72. 19: 871 (85.23%)         3: 66 (6.46%)            4: 65 (6.36%)
    
73. 5: 11 (1.08%)            2: 9 (0.88%)
    
74. Average: 16.71 Standard Deviation: 5.50
    
75. Min: 2 Max: 19
    
76. 
    
77. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
    
78. <= 32: 871 (85.23%)      <= 4: 131 (12.82%)       <= 8: 11 (1.08%)
    
79. <= 2: 9 (0.88%)         
    
80. 
    
81. SORTED SETS, NUMBER OF ELEMENTS
    
82. ===============================
    
83. 1: 216361 (24.78%)       2: 106871 (12.24%)       3: 67648 (7.75%)
    
84. 4: 48207 (5.52%)         5: 36085 (4.13%)         6: 29597 (3.39%)
    
85. 7: 23765 (2.72%)         8: 22549 (2.58%)         9: 20143 (2.31%)
    
86. 10: 18069 (2.07%)        11: 16387 (1.88%)        12: 15009 (1.72%)
    
87. 13: 13869 (1.59%)        14: 12683 (1.45%)        15: 12319 (1.41%)
    
88. 16: 10794 (1.24%)        17: 10068 (1.15%)        18: 8925 (1.02%)
    
89. 19: 8007 (0.92%)         20: 7618 (0.87%)         22: 7240 (0.83%)
    
90. 21: 7055 (0.81%)         23: 5973 (0.68%)         24: 5771 (0.66%)
    
91. 25: 4934 (0.57%)
    
92. (suppressed 2061 items with perc < 0.5% for a total of 15.72%)
    
93. Average: 25.47 Standard Deviation: 110.64
    
94. Min: 1 Max: 7018
    
95. 
    
96. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
    
97. <= 1: 216361 (24.78%)    <= 16: 119273 (13.66%)   <= 4: 115855 (13.27%)
    
98. <= 8: 111996 (12.82%)    <= 2: 106871 (12.24%)    <= 32: 92814 (10.63%)
    
99. <= 64: 52715 (6.04%)     <= 128: 29286 (3.35%)    <= 256: 13988 (1.60%)
    
100. <= 512: 7098 (0.81%)     <= 1024: 4762 (0.55%)    <= 2048: 1840 (0.21%)
     
101. <= 4096: 393 (0.05%)     <= 8192: 16 (0.00%)     
     
102. 
     
103. SORTED SETS, SIZE OF ELEMENTS
     
104. =============================
     
105. 6: 710230 (81.33%)       5: 75292 (8.62%)         4: 68661 (7.86%)
     
106. 3: 17136 (1.96%)         2: 1412 (0.16%)          9: 253 (0.03%)
     
107. 1: 76 (0.01%)            8: 74 (0.01%)            7: 39 (0.00%)
     
108. 21: 6 (0.00%)            30: 6 (0.00%)            20: 6 (0.00%)
     
109. 23: 6 (0.00%)            26: 5 (0.00%)            34: 5 (0.00%)
     
110. 24: 4 (0.00%)            27: 4 (0.00%)            18: 4 (0.00%)
     
111. 15: 4 (0.00%)            38: 3 (0.00%)            43: 3 (0.00%)
     
112. (suppressed 24 items with perc < 0.5% for a total of 0.00%)
     
113. Average: 5.69 Standard Deviation: 0.77
     
114. Min: 1 Max: 63
     
115. 
     
116. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
     
117. <= 8: 785635 (89.96%)    <= 4: 85797 (9.82%)      <= 2: 1412 (0.16%)
     
118. <= 16: 262 (0.03%)       <= 1: 76 (0.01%)         <= 32: 58 (0.01%)
     
119. <= 64: 28 (0.00%)      
     
120. 
     
121. HASHES, NUMBER OF FIELDS
     
122. ========================
     
123. 1: 301 (52.26%)          12: 177 (30.73%)         11: 95 (16.49%)
     
124. 13: 2 (0.35%)            14: 1 (0.17%)
     
125. Average: 6.09 Standard Deviation: 5.34
     
126. Min: 1 Max: 14
     
127. 
     
128. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
     
129. <= 1: 301 (52.26%)       <= 16: 275 (47.74%)     
     
130. 
     
131. HASHES, SIZE OF FIELDS
     
132. ======================
     
133. 17: 301 (52.26%)         22: 179 (31.08%)         13: 95 (16.49%)
     
134. 12: 1 (0.17%)
     
135. Average: 17.89 Standard Deviation: 3.11
     
136. Min: 12 Max: 22
     
137. 
     
138. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
     
139. <= 32: 480 (83.33%)      <= 16: 96 (16.67%)      
     
140. 
     
141. HASHES, SIZE OF VALUES
     
142. ======================
     
143. 13: 116 (20.14%)         3: 103 (17.88%)          410: 44 (7.64%)
     
144. 409: 38 (6.60%)          408: 27 (4.69%)          14: 22 (3.82%)
     
145. 407: 17 (2.95%)          395: 12 (2.08%)          406: 12 (2.08%)
     
146. 392: 11 (1.91%)          396: 11 (1.91%)          393: 11 (1.91%)
     
147. 4: 10 (1.74%)            12: 10 (1.74%)           411: 9 (1.56%)
     
148. 5: 7 (1.22%)             376: 7 (1.22%)           405: 6 (1.04%)
     
149. 349: 5 (0.87%)           347: 5 (0.87%)           359: 5 (0.87%)
     
150. (suppressed 43 items with perc < 0.5% for a total of 15.28%)
     
151. Average: 207.90 Standard Deviation: 193.12
     
152. Min: 1 Max: 416
     
153. 
     
154. Powers of two distribution: (NOTE <= p means: p/2 < x <= p)
     
155. <= 512: 298 (51.74%)     <= 16: 151 (26.22%)      <= 4: 113 (19.62%)
     
156. <= 8: 10 (1.74%)         <= 2: 3 (0.52%)          <= 1: 1 (0.17%)

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