Re: Growing shared memory leak?

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On Tue, Oct 26, 2021 at 2:21 PM Todd Zullinger <tmz@xxxxxxxxx> wrote:
>
> Hi,
>
> I trimmed a lot of useful context only because I don't have
> anything terribly useful to say about it.
>
> Jordan Metzmeier wrote:
> > jmetzmeier@localhost:/tmp $ df -hT /tmp
> > Filesystem     Type   Size  Used Avail Use% Mounted on
> > tmpfs          tmpfs   16G  3.5G   13G  22% /tmp
> >
> > However, `du` does not show 3.5GB of files inside:
> >
> > jmetzmeier@localhost:/tmp $ sudo du -sh ./
> > 32K     ./
> >
> > Does anyone know what could be happening here? Does writing a file to
> > tmpfs and then deleting it cause the tmpfs to retain that allocated
> > memory until reboot?
> >
> > My system is running Fedora 34. I have ensured nothing is mounted over
> > top of /tmp and hiding files.
>
> I don't know if there are subtle issues because this is a
> memory-based tmpfs filesystem.  But in general, you can see
> something like this if a process opens a file and keeps it
> open after it's deleted.  The space used by that file isn't
> freed until the process which has it open exits (or closes
> the file).
>
> You can look for that sort of thing with the lsof command:
>
>     sudo lsof -a +L1 /tmp
>
> Maybe that will point to what's taking up the space.
>
> --
> Todd

Deleted files were the culprit, thanks!
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