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システムで高負荷が発生する理由は? 負荷平均が高い

Solution In Progress - Updated -

Issue

  • システムで高負荷が発生する理由は?
  • システムの負荷平均が高くなります。
$ sar -q 
00:00:01      runq-sz  plist-sz   ldavg-1   ldavg-5  ldavg-15
<snip>
14:50:01            0       322      0.07      0.05      0.04
15:20:01            0       331      2.46     53.30     68.72
15:42:19           95       343    109.15    107.25     91.37
16:00:01            0       311     38.94     87.63     98.53
16:10:01            0       297      0.00     11.75     51.62
16:20:01            0       295      0.00      1.56     27.03

8 CPU サーバーの場合、負荷平均が 8 を超え、高くなります。

$ uptime
 15:11:10 up 29 days, 20:57,  1 user,  load average: 43.41, 27.10, 21.40

Environment

  • Red Hat Enterprise Linux 4、5、6、7、8、9

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