From: Charles Cazabon <charlesc-lists-btrfs@pyropus.ca>
To: btrfs list <linux-btrfs@vger.kernel.org>
Subject: Re: Oddly slow read performance with near-full largish FS
Date: Wed, 24 Dec 2014 21:14:13 -0600 [thread overview]
Message-ID: <20141225031413.GA5864@pyropus.ca> (raw)
In-Reply-To: <54976811.2060507@pobox.com>
Robert White <rwhite@pobox.com> wrote:
>
> You have very little free memory.
I think you're mistaken. Every diagnostic I've looked at says the opposite.
>From 30 seconds ago on the same machine, after unmounting the big btrfs
filesystem (and with a larger xfs one mounted), /proc/meminfo says almost the
entirety of the machine's 16GB is free:
MemTotal: 16469880 kB
MemFree: 16005392 kB
MemAvailable: 15974244 kB
Buffers: 84 kB
[...]
> This is called "demand paging",
Yes, I'm aware of how this works.
Charles
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Charles Cazabon
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next prev parent reply other threads:[~2014-12-25 3:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-17 2:42 Oddly slow read performance with near-full largish FS Charles Cazabon
2014-12-19 8:58 ` Satoru Takeuchi
2014-12-19 16:58 ` Charles Cazabon
2014-12-19 17:33 ` Duncan
2014-12-20 8:53 ` Chris Murphy
2014-12-20 10:03 ` Robert White
2014-12-20 10:57 ` Robert White
2014-12-21 16:32 ` Charles Cazabon
2014-12-21 21:32 ` Robert White
2014-12-21 22:53 ` Charles Cazabon
2014-12-22 0:38 ` Robert White
2014-12-25 3:14 ` Charles Cazabon [this message]
2014-12-22 14:16 ` Austin S Hemmelgarn
2014-12-25 3:15 ` Charles Cazabon
2014-12-22 2:13 ` Satoru Takeuchi
2014-12-25 3:18 ` Charles Cazabon
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