On 06/21/2018 09:05 AM, Susi Lehtola wrote:
> Dear all,
>
>
> I just noticed a very weird problem on my workstation. Although the
> machine has 64 GB of RAM installed,
>
> $ head -n 1 /proc/meminfo
> MemTotal: 2400748 kB
>
> that is, only a few gigabytes are actually available.
>
> Unfortunately I don't have physical access to the machine, which is a HP
> desktop bought last fall. According to dmesg, the model is something like
>
> [ 0.000000] DMI: HP HP EliteDesk 800 G3 TWR/8298, BIOS P01 Ver. 02.06
> 06/09/2017
>
> Also according to dmesg, it appears that the kernel *does* see all 64
> gigs, BUT OVER 60 GB IS RESERVED MEMORY!!
>
> [ 0.000000] Memory: 2326720K/66985176K available (12300K kernel code,
> 1568K rwdata, 3836K rodata, 2124K init, 1368K bss, 64658456K reserved,
> 0K cma-reserved)
>
> Does anyone have any idea of what could be going on?
Try installing htop ("$ sudo dnf install htop"), run it, press F6 and
select which memory item you want to sort by. That'll tell you what
process is sucking up memory.
Not knowing what your system is doing, it's hard to predict what it'd
be. Stuff like Java and memcached are candidates, as would a big tempfs
RAMdisk (e.g. /tmp). By default, Fedora uses 50% of your RAM for /tmp
(an absolutely idiotic idea, IMHO, which is why I turn that off and use
a normal filesystem directory for /tmp).
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital ri...@alldigital.com -
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- Give me ambiguity or give me something else! -
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