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Memory usage apparently higher than expected

shadowone
Hello, I know that this is a very old thread, but i have the same issue of understanding the "Memory Used" System Information in cpanel nowadays. On centos 6 the above explains a lot to me, but now on centos 7 servers i am confused again:
# cpanel Memory Used 56.55% (9,191,032 of 16,252,132) # free total used free shared buff/cache available Mem: 16252132 3535108 722616 1400968 11994408 10804056 Swap: 10485756 157680 10328076 # top KiB Mem : 16252132 total, 215900 free, 4097960 used, 11938272 buff/cache KiB Swap: 10485756 total, 10327244 free, 158512 used. 10241320 avail Mem # htop 5.45G/15.5G
Can anyone explain where this number (9,191,032) came from?

Comments

5 comments

Date Votes
  • cPanelMichael
    Hello, As of cPanel version 11.50, the memory usage information you see in Web Host Manager now comes from the "/proc/meminfo" file instead of the "free" command: Fixed case 189013: Correct memory usage % on all Linux versions. Thank you.
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  • hicom
    Hello, I had to open this post as it pointed to where cPanel is grabbing the memory information. On our 32GB cPanel server, free -m shows 24GB of available RAM, while cPanel reports only 10% is available. Running cat /proc/meminfo yields: MemAvailable: 26GB, MemFree: 1GB, yet our SWAP is 4GB in size even though there appears to be plenty of memory. MemTotal: 32667880 kB MemFree: 1372040 kB MemAvailable: 26649868 kB Buffers: 0 kB Cached: 1685240 kB SwapCached: 365548 kB Active: 4001156 kB Inactive: 1652532 kB Active(anon): 2984124 kB Inactive(anon): 1088784 kB Active(file): 1017032 kB Inactive(file): 563748 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 7812092 kB SwapFree: 3575112 kB Dirty: 2080 kB Writeback: 0 kB AnonPages: 3609480 kB Mapped: 140136 kB Shmem: 104412 kB Slab: 25229836 kB SReclaimable: 24034920 kB SUnreclaim: 1194916 kB KernelStack: 8096 kB PageTables: 53232 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 24146032 kB Committed_AS: 6612956 kB VmallocTotal: 34359738367 kB VmallocUsed: 362612 kB VmallocChunk: 34342256804 kB HardwareCorrupted: 0 kB AnonHugePages: 1169408 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 146916 kB DirectMap2M: 9181184 kB DirectMap1G: 26214400 kB
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  • cPanelMichael
    On our 32GB cPanel server, free -m shows 24GB of available RAM, while cPanel reports only 10% is available.

    Could you post a screenshot of what you see in the WHM interface? The "Available" memory should not display as a percentage, but instead should match closely to the "MemAvailable" value in the /proc/meminfo file. Thank you.
    0
  • hicom
    The SWAP is being used up after few days, reaching 3-5GB of SWAP usage and rising up, so there must be a memory consumption or the Kernel is not releasing the cached memory. Our setup is CentOS 7.2 64bit, CloudLinux 7, Apache with MemCache Module memory caching (which I'm suspecting the culprit here) This is WHM: ]http://picpaste.com/pics/Capture-iLHL6vap.1474386437.JPG
    This is cat /proc/meminfo:
    cat /proc/meminfo MemTotal: 32667880 kB MemFree: 1064456 kB MemAvailable: 25222012 kB Buffers: 0 kB Cached: 3673240 kB SwapCached: 884440 kB Active: 5921456 kB Inactive: 2832144 kB Active(anon): 4067692 kB Inactive(anon): 1478636 kB Active(file): 1853764 kB Inactive(file): 1353508 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 7812092 kB SwapFree: 4857204 kB Dirty: 244 kB Writeback: 0 kB AnonPages: 4529416 kB Mapped: 158512 kB Shmem: 465952 kB Slab: 22377568 kB SReclaimable: 21288156 kB SUnreclaim: 1089412 kB KernelStack: 9328 kB PageTables: 37664 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 24146032 kB Committed_AS: 6939664 kB VmallocTotal: 34359738367 kB VmallocUsed: 378860 kB VmallocChunk: 34342245588 kB HardwareCorrupted: 0 kB AnonHugePages: 2568192 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 146916 kB DirectMap2M: 9181184 kB DirectMap1G: 26214400 kB
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  • cPanelMichael
    Hello, I'm not seeing an issue with the output you provided. The following document explains the differences between "free" and "/proc/meminfo": Interpreting /proc/meminfo and free output for Red Hat Enterprise Linux 5, 6 and 7 - Red Hat Customer Portal Could you let us know if this helps to explain the output you see? Thank you.
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