Memory overcommit seems to occur even though 'ram_allocation_ratio' of nova.conf is set to '1.0'

Solution In Progress - Updated -

Issue

  • ram_allocation_ratio of nova.conf is set to 1.0.

    ram_allocation_ratio=1.0
    
  • Looking at /proc/meminfo, memory overcommit seems to occur.

    MemTotal:       790978344 kB
    MemFree:        160761756 kB
    MemAvailable:   243947436 kB
    ~~ snip ~~
    CommitLimit:    399683472 kB
    Committed_AS:   837184380 kB <=== Committed_AS is larger than MemTotal.
    

Environment

  • Red Hat OpenStack Platform 13

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