[vserver] hashify and memory saving

From: Tor Rune Skoglund <trs_at_swi.no>
Date: Fri 01 Jan 2016 - 20:37:52 GMT
Message-ID: <5686E3A0.9010808@swi.no>

Hello List,

Having been a happy linux-vserver user for more than 10 years now, it
was about time to test the hashify feature. The disk savings are
obvious, and easily measured, but I have been trying a lot harder to
measure any possible run-time memory savings. For the testing, I created
a simple template LAMP guest, and a lot of hashified guests cloned from
that one. I am unable to measure noticeably less memory usage when
running multiple hashified guests compared to non-hashified ones using
free and /proc/meminfo/'s MemAvailable entry.

However, this could very well be to shortcomings in my own understanding
how this should work or what to look for.

What should I look for regarding possible memory savings? Anyone with
any pointers?

This is Gentoo, util-vserver 0.30.216_pre3120, kernel Linux amd64

BR, Tor Rune Skoglund
Received on Fri Jan 1 20:36:08 2016

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