linux – 由于未知原因的高iowait

Linux 前端之家
前端之家收集整理的这篇文章主要介绍了linux – 由于未知原因的高iowait，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
我很难弄清楚导致我的服务器上的高iowait的原因.

这是iostat -xm 5 5的日志

  1. Linux 2.6.32-358.6.1.el6.x86_64 (prod-1.localdomain)    09/28/2013  _x86_64_    (16 cpu)
  2.  
  3. avg-cpu:  %user   %nice %system %iowait  %steal   %idle
  4.            6.98    0.05    3.72    3.54    0.00   85.71
  5.  
  6. Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await  svctm  %util
  7. sdb               0.08   120.88   30.27    1.72     0.96     0.48    92.20     0.34   10.67   3.79  12.13
  8. sda               7.63    37.19    8.96    4.89     0.35     0.16    76.40     0.16   11.63   2.19   3.04
  9.  
  10. avg-cpu:  %user   %nice %system %iowait  %steal   %idle
  11.            5.41    0.00    6.20   37.65    0.00   50.74
  12.  
  13. Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await  svctm  %util
  14. sdb               0.00   109.80  186.20    1.40     3.75     0.43    45.66    98.21  519.80   5.33 100.00
  15. sda              33.20     3.40   18.00    2.00     0.37     0.02    40.32     0.07    3.41   3.17   6.34
  16.  
  17. avg-cpu:  %user   %nice %system %iowait  %steal   %idle
  18.            5.55    0.00    7.42   30.06    0.00   56.97
  19.  
  20. Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await  svctm  %util
  21. sdb               0.00     0.00  196.00    0.00     3.91     0.00    40.85   100.41  506.01   5.10 100.00
  22. sda               0.00     2.40    1.80    2.60     0.05     0.02    30.91     0.01    2.95   2.73   1.20
  23.  
  24. avg-cpu:  %user   %nice %system %iowait  %steal   %idle
  25.            5.71    0.00    7.04   31.76    0.00   55.49
  26.  
  27. Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await  svctm  %util
  28. sdb               0.00   100.00  189.00    1.20     3.72     0.40    44.33    95.32  514.88   5.26 100.00
  29. sda              33.20     4.20   19.20    5.20     0.39     0.04    35.80     0.02    1.01   0.79   1.92
  30.  
  31. avg-cpu:  %user   %nice %system %iowait  %steal   %idle
  32.           61.93    0.00   10.08   14.99    0.00   12.99
  33.  
  34. Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await  svctm  %util
  35. sdb               0.00     0.40  185.40    1.40     3.76     0.01    41.31    83.22  431.16   5.28  98.62
  36. sda              33.20     5.40    9.60    4.00     0.21     0.04    37.65     0.02    1.24   1.04   1.42

如您所见,除了等待和％util非常高之外,所有指标都是正常的.
所以我认为/ dev / sdb可能有问题.

但是smartctl报告没有有用的信息.

  1. smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-358.6.1.el6.x86_64] (local build)
  2. Copyright (C) 2002-12 by Bruce Allen,http://smartmontools.sourceforge.net
  3.  
  4. === START OF INFORMATION SECTION ===
  5. Model Family:     Western Digital RE4 Serial ATA
  6. Device Model:     WDC WD2003FYYS-02W0B1
  7. Serial Number:    WD-WMAY04093732
  8. LU WWN Device Id: 5 0014ee 05877b196
  9. Firmware Version: 01.01D02
  10. User Capacity:    2,000,398,934,016 bytes [2.00 TB]
  11. Sector Size:      512 bytes logical/physical
  12. Device is:        In smartctl database [for details use: -P show]
  13. ATA Version is:   8
  14. ATA Standard is:  Exact ATA specification draft version not indicated
  15. Local Time is:    Sat Sep 28 09:05:30 2013 ICT
  16. SMART support is: Available - device has SMART capability.
  17. SMART support is: Enabled
  18.  
  19. === START OF READ SMART DATA SECTION ===
  20. SMART overall-health self-assessment test result: PASSED
  21.  
  22. General SMART Values:
  23. Offline data collection status:  (0x84) Offline data collection activity
  24.                     was suspended by an interrupting command from host.
  25.                     Auto Offline Data Collection: Enabled.
  26. Self-test execution status:      (   0) The prevIoUs self-test routine completed
  27.                     without error or no self-test has ever 
  28.                     been run.
  29. Total time to complete Offline 
  30. data collection:        (29160) seconds.
  31. Offline data collection
  32. capabilities:            (0x7b) SMART execute Offline immediate.
  33.                     Auto Offline data collection on/off support.
  34.                     Suspend Offline collection upon new
  35.                     command.
  36.                     Offline surface scan supported.
  37.                     Self-test supported.
  38.                     Conveyance Self-test supported.
  39.                     Selective Self-test supported.
  40. SMART capabilities:            (0x0003) Saves SMART data before entering
  41.                     power-saving mode.
  42.                     Supports SMART auto save timer.
  43. Error logging capability:        (0x01) Error logging supported.
  44.                     General Purpose Logging supported.
  45. Short self-test routine 
  46. recommended polling time:    (   2) minutes.
  47. Extended self-test routine
  48. recommended polling time:    ( 283) minutes.
  49. Conveyance self-test routine
  50. recommended polling time:    (   5) minutes.
  51. SCT capabilities:          (0x303f) SCT Status supported.
  52.                     SCT Error Recovery Control supported.
  53.                     SCT Feature Control supported.
  54.                     SCT Data Table supported.
  55.  
  56. SMART Attributes Data Structure revision number: 16
  57. Vendor Specific SMART Attributes with Thresholds:
  58. ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_Failed RAW_VALUE
  59.   1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
  60.   3 Spin_Up_Time            0x0027   253   253   021    Pre-fail  Always       -       9100
  61.   4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       42
  62.   5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  63.   7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  64.   9 Power_On_Hours          0x0032   090   090   000    Old_age   Always       -       7373
  65.  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
  66.  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
  67.  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       40
  68. 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       31
  69. 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       10
  70. 194 Temperature_Celsius     0x0022   123   107   000    Old_age   Always       -       29
  71. 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
  72. 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
  73. 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
  74. 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
  75. 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
  76.  
  77. SMART Error Log Version: 1
  78. No Errors Logged
  79.  
  80. SMART Self-test log structure revision number 1
  81. No self-tests have been logged.  [To run self-tests,use: smartctl -t]
  82.  
  83.  
  84. SMART Selective self-test log data structure revision number 1
  85.  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
  86.     1        0        0  Not_testing
  87.     2        0        0  Not_testing
  88.     3        0        0  Not_testing
  89.     4        0        0  Not_testing
  90.     5        0        0  Not_testing
  91. Selective self-test flags (0x0):
  92.   After scanning selected spans,do NOT read-scan remainder of disk.
  93. If Selective self-test is pending on power-up,resume after 0 minute delay.

我被困在这里,不知道解决问题的下一步行动.

任何帮助将不胜感激！

更新：

@MichaelHampton

我的自测日志,没有兴趣信息. smartctl -l selftest / dev / sdb

  1. smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-358.6.1.el6.x86_64] (local build)
  2. Copyright (C) 2002-12 by Bruce Allen,http://smartmontools.sourceforge.net
  3.  
  4. === START OF READ SMART DATA SECTION ===
  5. SMART Self-test log structure revision number 1
  6. Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
  7. # 1  Extended offline    Completed without error       00%      7380

@Mife

我的pidstat -d 1 30结果.

  1. Linux 2.6.32-358.6.1.el6.x86_64 (cass-23_120.localdomain)   09/28/2013  _x86_64_    (16 cpu)
  2.  
  3. 05:57:43 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  4.  
  5. 05:57:44 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  6.  
  7. 05:57:45 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  8. 05:57:46 PM      1555    736.00      0.00      0.00  java
  9. 05:57:46 PM     16698      0.00      4.00      0.00  java
  10.  
  11. 05:57:46 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  12. 05:57:47 PM       552      0.00     68.00      0.00  jbd2/sda3-8
  13. 05:57:47 PM      1555    352.00      0.00      0.00  java
  14. 05:57:47 PM     16698      0.00     12.00      0.00  java
  15. 05:57:47 PM     18074      0.00      4.00      0.00  java
  16. 05:57:47 PM     19295   1564.00      0.00      0.00  java
  17.  
  18. 05:57:47 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  19. 05:57:48 PM      1554   3128.00      8.00      4.00  xinetd
  20. 05:57:48 PM      1570    840.00      0.00      0.00  gmond
  21. 05:57:48 PM      2183      0.00      4.00      0.00  java
  22. 05:57:48 PM      2394     64.00      0.00      0.00  rsync
  23. 05:57:48 PM      2395    324.00      0.00      0.00  ssh
  24. 05:57:48 PM     13280     28.00      0.00      0.00  downloadm_new.s
  25. 05:57:48 PM     19295   1724.00      0.00      0.00  java
  26.  
  27. 05:57:48 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  28. 05:57:49 PM     19295   1744.00      0.00      0.00  java
  29.  
  30. 05:57:49 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  31. 05:57:50 PM      1083      0.00      8.00      0.00  flush-8:0
  32. 05:57:50 PM      1086      0.00      8.00      0.00  java
  33. 05:57:50 PM      2183      0.00     12.00      0.00  java
  34. 05:57:50 PM     13280    388.00      0.00      0.00  downloadm_new.s
  35. 05:57:50 PM     18074      0.00      4.00      0.00  java
  36. 05:57:50 PM     19295   1728.00      0.00      0.00  java
  37.  
  38. 05:57:50 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  39. 05:57:51 PM      2183      0.00      4.00      0.00  java
  40. 05:57:51 PM      2400      8.00      0.00      0.00  sleep
  41. 05:57:51 PM     18074      0.00      4.00      0.00  java
  42. 05:57:51 PM     19295   1680.00      0.00      0.00  java
  43.  
  44. 05:57:51 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  45. 05:57:52 PM       552      0.00     28.00      0.00  jbd2/sda3-8
  46. 05:57:52 PM      1112      0.00      4.00      0.00  jbd2/sda4-8
  47. 05:57:52 PM      2183      0.00      8.00      0.00  java
  48. 05:57:52 PM     16698      0.00      4.00      0.00  java
  49. 05:57:52 PM     18074      0.00      4.00      0.00  java
  50. 05:57:52 PM     19295   1672.00      0.00      0.00  java
  51.  
  52. 05:57:52 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  53. 05:57:53 PM      1555    376.00     20.00      0.00  java
  54. 05:57:53 PM      1570    792.00      0.00      0.00  gmond
  55. 05:57:53 PM     19295   1568.00      8.00      0.00  java
  56.  
  57. 05:57:53 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  58. 05:57:54 PM      3734    844.00    188.00      0.00  java
  59. 05:57:54 PM     19295   1672.00      0.00      0.00  java
  60.  
  61. 05:57:54 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  62. 05:57:55 PM      1083      0.00     20.00      0.00  flush-8:0
  63. 05:57:55 PM      3734   2620.00   1156.00      0.00  java
  64. 05:57:55 PM      4327      0.00      8.00      0.00  java
  65. 05:57:55 PM      9677      0.00      8.00      0.00  java
  66. 05:57:55 PM     16613      0.00      8.00      0.00  java
  67. 05:57:55 PM     19295   1272.00      8.00      0.00  java
  68. 05:57:55 PM     19426      0.00      8.00      0.00  java
  69.  
  70. 05:57:55 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  71. 05:57:56 PM      3734   3592.00   1200.00      0.00  java
  72. 05:57:56 PM     19295    332.00      0.00      0.00  java
  73. 05:57:56 PM     19426      0.00      4.00      0.00  java
  74.  
  75. 05:57:56 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  76. 05:57:57 PM       552      0.00     36.00      0.00  jbd2/sda3-8
  77. 05:57:57 PM      2405   1068.00     32.00      0.00  java
  78. 05:57:57 PM      3734   2972.00    828.00      0.00  java
  79. 05:57:57 PM      5457      0.00      8.00      0.00  java
  80. 05:57:57 PM      9677  28424.00    144.00     20.00  java
  81. 05:57:57 PM     16698      0.00      8.00      0.00  java
  82. 05:57:57 PM     18074      0.00      4.00      0.00  java
  83. 05:57:57 PM     19295      0.00      4.00      0.00  java
  84.  
  85. 05:57:57 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  86. 05:57:58 PM      2183      0.00      4.00      0.00  java
  87. 05:57:58 PM      2222      0.00      4.00      0.00  pidstat
  88. 05:57:58 PM      2405    500.00      0.00      0.00  java
  89. 05:57:58 PM      3734   4016.00    720.00      0.00  java
  90. 05:57:58 PM      5457      0.00      8.00      0.00  java
  91. 05:57:58 PM     16698      0.00      4.00      0.00  java
  92.  
  93. 05:57:58 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  94. 05:57:59 PM      1112      0.00      8.00      0.00  jbd2/sda4-8
  95. 05:57:59 PM      3734   4572.00    372.00      0.00  java
  96.  
  97. 05:57:59 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  98. 05:58:00 PM      1083      0.00     32.00      0.00  flush-8:0
  99. 05:58:00 PM      2405    496.00      0.00      0.00  java
  100. 05:58:00 PM      3734   5412.00      4.00      0.00  java
  101. 05:58:00 PM      5457      0.00     16.00      0.00  java
  102. 05:58:00 PM     11681      0.00      8.00      0.00  java
  103. 05:58:00 PM     14824      0.00      8.00      0.00  java
  104. 05:58:00 PM     16698      0.00     12.00      0.00  java
  105. 05:58:00 PM     17694      0.00      8.00      0.00  java
  106. 05:58:00 PM     18074      0.00     12.00      0.00  java
  107. 05:58:00 PM     18129      0.00      8.00      0.00  java
  108. 05:58:00 PM     19542      0.00      8.00      0.00  java
  109.  
  110. 05:58:00 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  111. 05:58:01 PM      3734   3888.00      0.00      0.00  java
  112. 05:58:01 PM      3813      8.00     12.00      0.00  java
  113. 05:58:01 PM     13280     28.00      0.00      0.00  downloadm_new.s
  114. 05:58:01 PM     18074      0.00      8.00      0.00  java
  115.  
  116. 05:58:01 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  117. 05:58:02 PM       552      0.00     44.00      0.00  jbd2/sda3-8
  118. 05:58:02 PM      1129      0.00     16.00      0.00  jbd2/sdb1-8
  119. 05:58:02 PM      2405    256.00      0.00      0.00  java
  120. 05:58:02 PM      3734   1200.00   1128.00      0.00  java
  121. 05:58:02 PM     16698      0.00      4.00      0.00  java
  122. 05:58:02 PM     18074      0.00      8.00      0.00  java
  123.  
  124. 05:58:02 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  125. 05:58:03 PM      1570   1172.00      0.00      0.00  gmond
  126. 05:58:03 PM      2183      0.00      4.00      0.00  java
  127. 05:58:03 PM      2405    256.00      0.00      0.00  java
  128. 05:58:03 PM      2442     92.00      0.00      0.00  rsync
  129. 05:58:03 PM      2443    916.00      0.00      0.00  ssh
  130. 05:58:03 PM      3734    576.00      0.00      0.00  java
  131. 05:58:03 PM      9677      0.00      4.00      0.00  java
  132. 05:58:03 PM     13280     56.00   8996.00      0.00  downloadm_new.s
  133.  
  134. 05:58:03 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  135. 05:58:04 PM      2183      0.00      4.00      0.00  java
  136. 05:58:04 PM      2405    256.00      0.00      0.00  java
  137. 05:58:04 PM      2443      8.00      0.00      0.00  ssh
  138. 05:58:04 PM      3734   2032.00     16.00      0.00  java
  139.  
  140. 05:58:04 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  141. 05:58:05 PM      1083      0.00      4.00      0.00  flush-8:0
  142. 05:58:05 PM      2405    224.00      0.00      0.00  java
  143. 05:58:05 PM      2446    160.00      0.00      0.00  sleep
  144. 05:58:05 PM      3734   5344.00    648.00      0.00  java
  145. 05:58:05 PM      3813      0.00      8.00      0.00  java
  146. 05:58:05 PM     13280   1016.00      0.00      0.00  downloadm_new.s
  147.  
  148. 05:58:05 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  149. 05:58:06 PM      2405     16.00      0.00      0.00  java
  150. 05:58:06 PM      3734   6196.00    344.00      0.00  java
  151.  
  152. 05:58:06 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  153. 05:58:07 PM       552      0.00      8.00      0.00  jbd2/sda3-8
  154. 05:58:07 PM      2405    112.00      0.00      0.00  java
  155. 05:58:07 PM      3734   3532.00      0.00      0.00  java
  156. 05:58:07 PM     16698      0.00      4.00      0.00  java
  157. 05:58:07 PM     18074      0.00      4.00      0.00  java
  158.  
  159. 05:58:07 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  160. 05:58:08 PM      1570   1172.00      0.00      0.00  gmond
  161. 05:58:08 PM      2183      0.00      4.00      0.00  java
  162. 05:58:08 PM      2405    352.00      0.00      0.00  java
  163. 05:58:08 PM      3734   4588.00      0.00      0.00  java
  164. 05:58:08 PM     16698      0.00      8.00      0.00  java
  165.  
  166. 05:58:08 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  167. 05:58:09 PM      2222      0.00      4.00      0.00  pidstat
  168. 05:58:09 PM      2405    368.00      0.00      0.00  java
  169. 05:58:09 PM      3734   1720.00      0.00      0.00  java
  170. 05:58:09 PM     16698      0.00      4.00      0.00  java
  171.  
  172. 05:58:09 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  173. 05:58:10 PM      1083      0.00      8.00      0.00  flush-8:0
  174. 05:58:10 PM      2405    480.00      0.00      0.00  java
  175. 05:58:10 PM      3734     40.00     16.00      0.00  java
  176. 05:58:10 PM     17768      0.00      8.00      0.00  java
  177.  
  178. 05:58:10 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  179. 05:58:11 PM      2405    608.00      0.00      0.00  java
  180. 05:58:11 PM      3734    264.00      0.00      0.00  java
  181. 05:58:11 PM     19426      0.00      4.00      0.00  java
  182.  
  183. 05:58:11 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  184. 05:58:12 PM      1129      0.00     24.00      0.00  jbd2/sdb1-8
  185. 05:58:12 PM      2405    240.00      0.00      0.00  java
  186. 05:58:12 PM     18074      0.00      8.00      0.00  java
  187.  
  188. 05:58:12 PM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  189. 05:58:13 PM      1570   1172.00      0.00      0.00  gmond
  190. 05:58:13 PM      2183      0.00      4.00      0.00  java
  191. 05:58:13 PM      2405    128.00      0.00      0.00  java
  192. 05:58:13 PM     18074      0.00      4.00      0.00  java
  193.  
  194. Average:          PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
  195. Average:          552      0.00      6.13      0.00  jbd2/sda3-8
  196. Average:         1083      0.00      2.40      0.00  flush-8:0
  197. Average:         1086      0.00      0.27      0.00  java
  198. Average:         1112      0.00      0.40      0.00  jbd2/sda4-8
  199. Average:         1129      0.00      1.33      0.00  jbd2/sdb1-8
  200. Average:         1554    104.16      0.27      0.13  xinetd
  201. Average:         1570    171.43      0.00      0.00  gmond
  202. Average:         2183      0.00      1.60      0.00  java
  203. Average:         2222      0.00      0.27      0.00  pidstat
  204. Average:         2405    178.49      1.07      0.00  java
  205. Average:         2446      5.33      0.00      0.00  sleep
  206. Average:         3734   1778.49    220.45      0.00  java
  207. Average:         3813      0.27      0.67      0.00  java
  208. Average:         4327      0.00      0.27      0.00  java
  209. Average:         5457      0.00      1.07      0.00  java
  210. Average:         9677    946.52      5.19      0.67  java
  211. Average:        11681      0.00      0.27      0.00  java
  212. Average:        13280     50.48    299.57      0.00  downloadm_new.s
  213. Average:        14824      0.00      0.27      0.00  java
  214. Average:        16613      0.00      0.27      0.00  java
  215. Average:        16698      0.00      2.13      0.00  java
  216. Average:        17694      0.00      0.27      0.00  java
  217. Average:        17768      0.00      0.27      0.00  java
  218. Average:        18074      0.00      2.13      0.00  java
  219. Average:        18129      0.00      0.27      0.00  java
  220. Average:        19295    498.04      0.67      0.00  java
  221. Average:        19426      0.00      0.53      0.00  java
  222. Average:        19542      0.00      0.27      0.00  java

@kworr

这是我的/ dev / sdb1的挂载选项.

  1. % mount | grep sdb
  2. /dev/sdb1 on /backup type ext4 (rw,noatime,commit=100)

UPDATE2
您的硬盘需要多少IOPS.

  1. 7,200 rpm SATA drives   HDD     ~75-100 IOPS[2]     SATA 3 Gb/s     
  2. 10,000 rpm SATA drives  HDD     ~125-150 IOPS[2]    SATA 3 Gbit/s   
  3. 10,000 rpm SAS drives   HDD     ~140 IOPS[2]            SAS     
  4. 15,000 rpm SAS drives   HDD     ~175-210 IOPS[2]    SAS

解决方法

这里发生了很多事情,但是pid 3734,一个java进程似乎是你的罪魁祸首.你应该知道它在做什么,传递给它的参数是什么,它的父pid是什么,以及它的意图.

在超过30秒的1秒样本期间,java使用1778.49读取kb / sec,还有其他java进程,pids 9677和19295分别使用946.52和498.04读取kb / sec.

我无法告诉你他们所做的事情是错还是​​正确,但是你的I / O很高,主要是因为那些java进程.

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