Host Monitoring System Reports Incorrect Memory Usage

Solution In Progress - Updated -

Issue

  • Our system monitoring tool has started to report incorrect memory statistics for recently updated RHEL 7 clients.
  • The reported memory usage is far different than what one can observe on the client via top or vmstat.
  • Sometimes the reported memory usage is just unreasonably small.  Sometimes it is actually negative!

Environment

  • Red Hat Enterprise Linux 7.7 (RHEL 7.7)
    • net-snmp-5.7.2-43
  • 3rd-party Solarwinds host monitoring software.  (Could also affect other host monitoring software.)

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