I am trying to determine if a problem I am experiencing is a bug or if there is something I am missing. Last week I found that 15GB of my 32GB RAM was used by shared memory, causing my system to fill swap. After about 1hr of trying to discover the reason for this, the only thing I could find was that `df` was indicating that space was being used by tmpfs mounted on /tmp, but I could not find files that came anywhere close to this size. Now I am inspecting my system after a few days of uptime and have found that shared memory is slowly growing again. It's currently up to almost 4GB: jmetzmeier@localhost:/tmp $ free -m total used free shared buff/cache available Mem: 32065 9493 2185 3920 20386 18204 Swap: 8191 2114 6077 When I check df, what's reported as used on /tmp is pretty close to my shared memory usage: 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. Thanks, Jordan Metzmeier _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure