> > Is it expected behavior (so I can have a look at something server
> returned
> > somehow and it's kept there for me), or a plain leak?
> This is totally normal behaviour for any C program.

Thanks Konstantin and Craig for the help.

To mitigate the issue I've changed the allocator on my laptop to jemalloc.
For single psql run on my Ubuntu system:

sudo apt install libjemalloc1
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1 psql

A global replacement by putting /usr/lib/x86_64-linux-gnu/libjemalloc.so.1
to /etc/ld.so.preload also had a positive effect fixing this behavior in
all the applications, reducing after-boot memory footprint from 7 GB to 3.

Darafei Praliaskouski,
GIS Engineer / Juno Minsk

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