What does ShmemHugePages mean?

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1















I'm using grep Huge /proc/meminfo and getting:



AnonHugePages: 16384 kB
ShmemHugePages: 0 kB
HugePages_Total: 33
HugePages_Free: 18
HugePages_Rsvd: 18
HugePages_Surp: 1
Hugepagesize: 2048 kB


What does ShmemHugePages means/refers to?










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    1















    I'm using grep Huge /proc/meminfo and getting:



    AnonHugePages: 16384 kB
    ShmemHugePages: 0 kB
    HugePages_Total: 33
    HugePages_Free: 18
    HugePages_Rsvd: 18
    HugePages_Surp: 1
    Hugepagesize: 2048 kB


    What does ShmemHugePages means/refers to?










    share|improve this question


























      1












      1








      1


      0






      I'm using grep Huge /proc/meminfo and getting:



      AnonHugePages: 16384 kB
      ShmemHugePages: 0 kB
      HugePages_Total: 33
      HugePages_Free: 18
      HugePages_Rsvd: 18
      HugePages_Surp: 1
      Hugepagesize: 2048 kB


      What does ShmemHugePages means/refers to?










      share|improve this question
















      I'm using grep Huge /proc/meminfo and getting:



      AnonHugePages: 16384 kB
      ShmemHugePages: 0 kB
      HugePages_Total: 33
      HugePages_Free: 18
      HugePages_Rsvd: 18
      HugePages_Surp: 1
      Hugepagesize: 2048 kB


      What does ShmemHugePages means/refers to?







      meminfo






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      edited Jan 14 at 8:51









      Rui F Ribeiro

      39.6k1479132




      39.6k1479132










      asked Jan 9 at 17:15









      adrhcadrhc

      247111




      247111




















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          The proc(5) manpage says




          (CONFIG_TRANSPARENT_HUGEPAGE is required.) Memory used
          by shared memory (shmem) and tmpfs(5) allocated with
          huge pages




          ShmemHugePages counts the number of huge pages which are used for share memory allocations, or tmpfs. Huge pages are pages which are larger than the “standard” page size on your platform (typically, 4KiB); they have certain benefits and disadvantages, and it’s therefore interesting to keep track of them separately. Shared memory is memory which is allocated with the intention of sharing it between multiple processes, typically allocated using shmget (which allows the caller to explicitly request huge pages). tmpfs is the RAM-based temporary file system commonly used nowadays for /tmp and a number of other mount points.






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            The proc(5) manpage says




            (CONFIG_TRANSPARENT_HUGEPAGE is required.) Memory used
            by shared memory (shmem) and tmpfs(5) allocated with
            huge pages




            ShmemHugePages counts the number of huge pages which are used for share memory allocations, or tmpfs. Huge pages are pages which are larger than the “standard” page size on your platform (typically, 4KiB); they have certain benefits and disadvantages, and it’s therefore interesting to keep track of them separately. Shared memory is memory which is allocated with the intention of sharing it between multiple processes, typically allocated using shmget (which allows the caller to explicitly request huge pages). tmpfs is the RAM-based temporary file system commonly used nowadays for /tmp and a number of other mount points.






            share|improve this answer



























              2














              The proc(5) manpage says




              (CONFIG_TRANSPARENT_HUGEPAGE is required.) Memory used
              by shared memory (shmem) and tmpfs(5) allocated with
              huge pages




              ShmemHugePages counts the number of huge pages which are used for share memory allocations, or tmpfs. Huge pages are pages which are larger than the “standard” page size on your platform (typically, 4KiB); they have certain benefits and disadvantages, and it’s therefore interesting to keep track of them separately. Shared memory is memory which is allocated with the intention of sharing it between multiple processes, typically allocated using shmget (which allows the caller to explicitly request huge pages). tmpfs is the RAM-based temporary file system commonly used nowadays for /tmp and a number of other mount points.






              share|improve this answer

























                2












                2








                2







                The proc(5) manpage says




                (CONFIG_TRANSPARENT_HUGEPAGE is required.) Memory used
                by shared memory (shmem) and tmpfs(5) allocated with
                huge pages




                ShmemHugePages counts the number of huge pages which are used for share memory allocations, or tmpfs. Huge pages are pages which are larger than the “standard” page size on your platform (typically, 4KiB); they have certain benefits and disadvantages, and it’s therefore interesting to keep track of them separately. Shared memory is memory which is allocated with the intention of sharing it between multiple processes, typically allocated using shmget (which allows the caller to explicitly request huge pages). tmpfs is the RAM-based temporary file system commonly used nowadays for /tmp and a number of other mount points.






                share|improve this answer













                The proc(5) manpage says




                (CONFIG_TRANSPARENT_HUGEPAGE is required.) Memory used
                by shared memory (shmem) and tmpfs(5) allocated with
                huge pages




                ShmemHugePages counts the number of huge pages which are used for share memory allocations, or tmpfs. Huge pages are pages which are larger than the “standard” page size on your platform (typically, 4KiB); they have certain benefits and disadvantages, and it’s therefore interesting to keep track of them separately. Shared memory is memory which is allocated with the intention of sharing it between multiple processes, typically allocated using shmget (which allows the caller to explicitly request huge pages). tmpfs is the RAM-based temporary file system commonly used nowadays for /tmp and a number of other mount points.







                share|improve this answer












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                answered Jan 9 at 17:43









                Stephen KittStephen Kitt

                168k24379457




                168k24379457



























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