Public bug reported:
I observed that installing and removing snaps seemed to make snapd grow
in size, so to see if this assertion was true I repeatedly installed
and removed a small package over the course of a few hours and measured
the memory footprint with smemstat.
Attached is the smemstat log, with samples taken every 60 seconds. As
one can see the USS, PSS and RSS sizes grow steadily to over 90MB over
time. This suggests either data is being cached too aggressively or
there is a memory leak somewhere, or perhaps garbage collection is not
occurring as expected.
Although my test case is rather artificial, it does show there is an
issue with memory size on snapd on a long running system when snaps are
installed and removed. This is concerning for small IoT embedded
devices.
Notes:
USS = Unique Set Size
PSS = Proportional Set Size
RSS = Resident Set Size
AttachedL smemstat log + data in a LibreOffice spreadsheet with graph
showing memory size growth.
** Affects: snapd (Ubuntu)
Importance: High
Status: New
** Attachment added: "smemstat stats on snapd"
https://bugs.launchpad.net/bugs/1642068/+attachment/4777858/+files/smemstat-snapd.log
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https://bugs.launchpad.net/bugs/1642068
Title:
snapd memory sizes grows huge over time
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