Massive growth in kmalloc-512 cache causes a system memory shortage

Solution Unverified - Updated -

Issue

  • Massive growth in kmalloc-512 cache causes a system memory shortage
crash> kmem -i
                 PAGES        TOTAL      PERCENTAGE
    TOTAL MEM  2002199       7.6 GB         ----
         FREE    66566       260 MB    3% of TOTAL MEM
         USED  1935633       7.4 GB   96% of TOTAL MEM
       SHARED    21992      85.9 MB    1% of TOTAL MEM
      BUFFERS        0            0    0% of TOTAL MEM
       CACHED    31186     121.8 MB    1% of TOTAL MEM
         SLAB  1731023       6.6 GB   86% of TOTAL MEM <<-----

   TOTAL HUGE        0            0         ----
    HUGE FREE        0            0    0% of TOTAL HUGE

   TOTAL SWAP  1310719         5 GB         ----
    SWAP USED   276935       1.1 GB   21% of TOTAL SWAP
    SWAP FREE  1033784       3.9 GB   78% of TOTAL SWAP

 COMMIT LIMIT  2311818       8.8 GB         ----
    COMMITTED  3708190      14.1 GB  160% of TOTAL LIMIT

Environment

  • Red Hat Enterprise Linux 7.7 (kernel-3.10.0-1062.12.1.el7)
  • Lustre Filesystem

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