Put me in my place if you feel like I am hijacking but:
I found this topic trying to explore the reasons for my suddenly incredibly slow Volumio (RPi2). I have loads of other things installed on top of Volumio (shame on me, I know), because I test that particular RPi as 433 sniffer as well. Everything worked fine (for days when all this was installed) up to a point today when I found out that mpd failed. I got same error like mentioned here: mpd broken in Volumio 2.5.26 so I went on with building libbcm_host.so as suggested. While tinkering with that, I realised that RPi is getting really sluggish. Wanted to check RAM but could not get to RPimonitor anymore. Several reboots later I found out that I have no swap enabled. First I tried to edit dynswap.sh, replace /data/ with /imgpart/. Reboot, no change. Then I updated to the latest volumio version (2.852), nada. I Checked github and manually edited dynswap.sh (which looked exactly the same as before update) to mirror the last version (/data/ replaced with /swap/ and so on). Another reboot, no luck.
I tried manually run sudo dynswap.sh but it seems not to do anything at all.
Any thoughts?