Re: Memory Leaks or Mem. being misreported
nito@dismail.de wrote:
> after upgrading my hardware I started to notice what seemed like memory leaks.
Did this cause a problem, or are you chasing a number you don't
like?
> 650MiB(with MATE) of RAM are being used and after extended use, when closing all
> gui-programs except a terminal, based on prior experience I would expect the
> RAM usage to not be more than +120MiB compared to after booting. I am *not*
> counting file cache/buffers in this (or I severely misunderstand how to read
> free's and top's output).
Why would you think this?
Is this causing a problem for you?
> Or maybe I'm just stupid and misreading top's and free's output.
You are probably reading them correctly but misinterpreting what
the system is doing.
> Also this seems to be hardware specific.
What different hardware have you tried?
> $ free -h
> total used free shared buff/cache available
> Mem: 31Gi 397Mi 30Gi 11Mi 314Mi 30Gi
> Swap: 6,0Gi 0B 6,0Gi
>
> --After using and closing Firefox
> --(no processes using that much RAM are listed in htop):
> $ free -h
> total used free shared buff/cache available
> Mem: 31Gi 1,1Gi 2,4Gi 13Mi 27Gi 29Gi
> Swap: 6,0Gi 0B 6,0Gi
>
>
> --After Backing up which "filled" RAM with file caches:
> $ free -h
> total used free shared buff/cache available
> Mem: 31Gi 471Mi 328Mi 13Mi 30Gi 30Gi
> Swap: 6,0Gi 0B 6,0Gi
This all looks fine. You are barely using your memory. See the
available number at the end? That's what would be available for
programs that want to use it.
> After that (h)top and free are disagreeing on how much memory is being used
> (see SWAP).
> --After Firefox (htop,top and free report more or less the same):
> $ free -h
> total used free shared buff/cache available
> Mem: 31Gi 1,5Gi 27Gi 92Mi 2,7Gi 29Gi
> Swap: 6,0Gi 0B 6,0Gi
>
> -- After allocating 30GiB and then exiting:
> $ top -b -n 1 | grep "^MiB"
> MiB Mem : 32092,0 total, 27747,1 free, 744,3 used, 3600,6 buff/cache
> MiB Swap: 6144,0 total, 6143,5 free, 0,5 used. 30458,0 avail Mem
> $ free -h
> total used free shared buff/cache available
> Mem: 31Gi 743Mi 27Gi 93Mi 3,5Gi 29Gi
> Swap: 6,0Gi 0,0Ki 6,0Gi
That's an insignificant difference caused by rounding methods.
-dsr-
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