Date: Mon, 18 Jun 2018 13:01:40 +0100 From: tech-lists <tech-lists@zyxst.net> To: freebsd-stable@freebsd.org Subject: Re: lightly loaded system eats swap space Message-ID: <7817cd74-ba4e-100d-72a2-050d387f90b4@zyxst.net> In-Reply-To: <CA%2BtpaK3iy%2BD3OLa019jxQ-QMqA3MqStUVU0zcOodjP1oyfNAsg@mail.gmail.com> References: <c8277497-ffcf-0503-490b-96d1b4605af7@zyxst.net> <CA%2BtpaK3iy%2BD3OLa019jxQ-QMqA3MqStUVU0zcOodjP1oyfNAsg@mail.gmail.com>
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On 18/06/2018 00:04, Adam wrote:
> Based upon the output neither ram nor swap seems like similar spec so I
> wonder if you could say what you mean by that.
server with the problem:
last pid: 62387; load averages: 0.07, 0.10, 0.08
up 30+01:30:01 12:46:40
48 processes: 1 running, 47 sleeping
CPU: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle
Mem: 5404K Active, 1218M Inact, 4927M Laundry, 117G Wired, 1392M Buf,
2116M Free
ARC: 109G Total, 2982M MFU, 105G MRU, 288K Anon, 385M Header, 638M Other
104G Compressed, 105G Uncompressed, 1.01:1 Ratio
Swap: 4096M Total, 3383M Used, 713M Free, 82% Inuse
This server runs 1 bhyve instance using 16GB. It has 128GB RAM.
server without a problem:
last pid: 84491; load averages: 0.03, 0.02, 0.02
up 17+14:39:31 12:47:33
27 processes: 1 running, 26 sleeping
CPU: % user, % nice, % system, % interrupt, % idle
Mem: 2915M Active, 25G Inact, 9947M Laundry, 28G Wired, 1572M Buf, 59G Free
ARC: 22G Total, 3379M MFU, 19G MRU, 781K Anon, 64M Header, 974K Other
22G Compressed, 29G Uncompressed, 1.33:1 Ratio, 121M Overhead
Swap: 35G Total, 3747M Used, 32G Free, 10% Inuse
This server runs 10 bhyve instances of various RAM sizes, from 4GB to
32GB. It also has 128GB RAM installed. This is what I mean by "similar
spec", I mean in terms of RAM.
This server doesn't usually show swap as being in use, but I can
actually account for this, as there is memory overcommitment here.
My point is that 'server with problem' should not show a resources issue
with just one bhyve instance using 16GB RAM but apparently it is, and I
don't know why. I am starting the VMs by hand, without any third-party
application, and I'm not wiring memory on the command line.
thanks,
--
J.
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