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sar コマンドにおける kbmemused の算出方法

Solution In Progress - Updated -

Issue

  • RHEL9 では、man sarkbmemused の説明が変更されました。
  • 値はどのように算出されますか? 以前のバージョンと比べて何が違いますか?
RHEL8 and older version
# man sar
...
              kbmemused
                     Amount of used memory in kilobytes. This does not take into account memory used by  the  kernel
                     itself.
RHEL9 and RHEL10
# man sar
...
              kbmemused
                     Amount of used memory in kilobytes (calculated as total installed  memory  -  kbmemfree  -  kb‐
                     buffers - kbcached - kbslab).

Environment

  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7
  • sysstat-12.5.4-5.el9

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