** Description changed: We might have a memleak in snapd 2.38+ on install - this could be related to the move from go-1.6 to go-1.10. This was reported by a customer. The data points we have so far: - happens on refresh for the customer - on systems with low amounts of memory (256M) this can lead to install/revert failures because e.g. unsquashfs will fail to extract the snap.yaml - the customer is using a plugin that talks to the socket regularly, maybe we leak there - I did some initial testing that refreshes/installs a bunch of times (20 - in this test) to see how that affects the memory. Once for 2.37.4 once - for 2.38-git. + I did some initial testing that refreshes/installs a bunch of times (20 in this test) to see how that affects the memory. Once for 2.37.4 once for 2.38-git. One thing to keep in mind is that the changes data will requires a small + amount of memory. So a small growth per install is normal (that the data that + snap changes will display). We prune those after pruneMaxChanges is hit or + after 24h. The data: $ snap version snap 2.37.4+18.04.1 snapd 2.37.4+18.04.1 series 16 ubuntu 18.04 kernel 4.15.0-46-generic $ sudo systemctl restart snapd ; sudo snap install --dangerous /tmp/hello_20.snap; ps -C snapd -ocmd,rsz,vsz; for i in $(seq 20); do sudo snap install --dangerous /tmp/hello_20.snap ; done ; ps -C snapd -ocmd,rsz,vsz hello 2.10 installed CMD RSZ VSZ /usr/lib/snapd/snapd 31580 1221524 hello 2.10 installed ... hello 2.10 installed CMD RSZ VSZ /usr/lib/snapd/snapd 33952 1297088 and then with: $ snap version snap 2.38+git1216.13ed1b8~ubuntu16.04.1 snapd 2.38+git1216.13ed1b8~ubuntu16.04.1 series 16 ubuntu 18.04 kernel 4.15.0-46-generic $ sudo systemctl restart snapd ; sudo snap install --dangerous /tmp/hello_20.snap; ps -C snapd -ocmd,rsz,vsz; for i in $(seq 20); do sudo snap install --dangerous /tmp/hello_20.snap ; done ; ps -C snapd -ocmd,rsz,vsz hello 2.10 installed CMD RSZ VSZ /usr/lib/snapd/snapd 35832 1226080 hello 2.10 installed ... hello 2.10 installed CMD RSZ VSZ /usr/lib/snapd/snapd 36760 1300068 So this looks like the RSZ size of snapd itself is bigger but it seems like we indeed grow.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822738 Title: memleak in 2.38+ ? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1822738/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
