Why does the process `rss` in OOM show much less?

Solution Verified - Updated -

Issue

  • System triggered OOM even though the process list in oom message shows very little amount in rss.
Raw
...
Apr 12 09:13:15 example.com kernel: [ pid ]   uid  tgid total_vm      rss nr_ptes swapents oom_score_adj name
Apr 12 09:13:15 example.com kernel: [23463]  1004 23463 43777931 31059068   62040   363067             0 java
                                                                 --------
                                                                    ^
                                                                    +-- Biggest amount in 120GB system
...

Environment

  • Red Hat Enterprise Linux

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