Gentoo Archives: gentoo-user

From: Michael Mol <mikemol@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Running out of space on /var partition
Date: Wed, 27 Jul 2011 15:05:41
Message-Id: CA+czFiD6PZak4WoxkAZHPrbHPoAyLqbGH4D+K54Y7XLoKybWNA@mail.gmail.com
In Reply to: Re: [gentoo-user] Running out of space on /var partition by Alan McKinnon
1 On Wed, Jul 27, 2011 at 10:52 AM, Alan McKinnon <alan.mckinnon@×××××.com> wrote:
2 > On Wednesday 27 July 2011 15:40:03 Neil Bothwick did opine thusly:
3 >> On Wed, 27 Jul 2011 14:41:33 +0100, Peter Humphrey wrote:
4 >> > Doesn't do that here. When tmpfs is full it starts being swapped
5 >> > out to the swap partition. Perhaps you didn't have any swap at
6 >> > the time.
7 >>
8 >> The default size for a tmpfs filesystem is half the physical RAM,
9 >> unless you specify more as a mount option, it will never use
10 >> significant amounts of swap.
11 >>
12 >> I wonder how effective tmpfs is for PORTAGE_TMPDIR as the builds
13 >> that need a lot of disk space can often require a fair bit of
14 >> memory too, and tmpfs is using it all.
15 >
16 > In this last week someone reported doing actually measurements and
17 > found that using a tmpfs was actually slower.
18
19 Hm. I wonder why that is; it seems counterintuitive to my
20 understanding of how tmpfs is implemented wrt the kernel's caching.
21 But I haven't red up on that in years.
22
23 --
24 :wq