After some very thorough analysis, I've concluded that zeitgeist is not
at blame here.
If my understanding of the kernel slab allocator is correct, free()
doesn't actually free the memory from a program's space until the kernel
decides it needs reclaimed. As such, zeitgeist-daemon is not at fault
and probably not actually using all that memory.
** Attachment added: "zeitgeist research.ods"
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Extensions, which is the registrant for Zeitgeist Extensions.
Large requests increase memory usage considerably
Status in Zeitgeist Framework:
Status in Zeitgeist Extensions:
Status in “zeitgeist” package in Ubuntu:
I'm seeing with standalone Sezen that after running it, mem usage of
the zeitgeist-daemon process goes up from ~13MB to ~40MB, this is
understandable as when Sezen is starting, it does one big query where
it asks for everything grouped by most recent subjects and in my case
this returns ~11 thousand events, so the extra 30MB can be explained
by allocating memory for the DBus reply.
Still, my question is whether Zeitgeist should be at mercy of the
applications, where nothing prevents them from spiking the memory
usage of the core process. (I already saw a couple of times zeitgeist
using 80-100MB of memory on my system). Perhaps there's a way to tell
python dbus to free its buffers?
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