From: Nicolas Sebrecht <nsebrecht@piing.fr>
To: gentoo-user@lists.gentoo.org
Cc: Nicolas Sebrecht <nsebrecht@piing.fr>
Subject: [gentoo-user] Re: aligning SSD partitions
Date: Thu, 6 Sep 2012 08:57:55 +0200 [thread overview]
Message-ID: <20120906065755.GA2442@nicolas-desktop> (raw)
In-Reply-To: <504791EB.2030103@gmail.com>
The 05/09/12, Dale wrote:
> Michael Mol wrote:
> > On Wed, Sep 5, 2012 at 11:17 AM, Neil Bothwick <neil@digimed.co.uk> wrote:
> >> On Wed, 05 Sep 2012 07:52:45 -0500, Dale wrote:
> >>
> >>>>> I might also add, I see no speed improvements in putting portages
> >>>>> work directory on tmpfs. I have tested this a few times and the
> >>>>> difference in compile times is just not there.
> >>>> Probably because with 16GB everything stays cached anyway.
> >>> I cleared the cache between the compiles. This is the command I use:
> >>>
> >>> echo 3 > /proc/sys/vm/drop_caches
> >> But you are still using the RAM as disk cache during the emerge, the data
> >> doesn't stay around long enough to need to get written to disk with so
> >> much RAM for cache.
> > Indeed. Try setting the mount to write-through to see the difference.
> >
> >
>
> When I run that command, it clears all the cache. It is the same as if
> I rebooted. Certainly you are not thinking that cache survives a reboot?
You missed the point. One of the first thing emerge will do is to
uncompress the package. At this time, all the files are cached in RAM.
Hence, everything needed for the build/compilation will come from the
cache like it would do with tmpfs.
--
Nicolas Sebrecht
next prev parent reply other threads:[~2012-09-06 7:00 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 7:20 [gentoo-user] aligning SSD partitions Philip Webb
2012-09-04 7:47 ` Neil Bothwick
2012-09-04 20:31 ` Volker Armin Hemmann
2012-09-04 20:58 ` Neil Bothwick
2012-09-04 21:00 ` Neil Bothwick
2012-09-04 21:52 ` Peter Humphrey
2012-09-05 0:42 ` Philip Webb
2012-09-05 8:23 ` Neil Bothwick
2012-09-05 9:02 ` Philip Webb
2012-09-05 9:23 ` Peter Humphrey
2012-09-05 11:07 ` Dale
2012-09-05 11:25 ` Peter Humphrey
2012-09-05 12:02 ` Dale
2012-09-05 12:58 ` Peter Humphrey
2012-09-05 18:02 ` Dale
2012-09-05 19:01 ` Paul Hartman
2012-09-05 20:46 ` Dale
2012-09-05 21:22 ` Paul Hartman
2012-09-05 22:36 ` Peter Humphrey
2012-09-05 12:31 ` Neil Bothwick
2012-09-05 12:52 ` Dale
2012-09-05 15:17 ` Neil Bothwick
2012-09-05 15:23 ` Michael Mol
2012-09-05 17:54 ` Dale
2012-09-05 23:42 ` Neil Bothwick
2012-09-06 9:13 ` Dale
2012-09-06 6:57 ` Nicolas Sebrecht [this message]
2012-09-06 9:15 ` [gentoo-user] " Dale
2012-09-06 9:47 ` Neil Bothwick
2012-09-06 10:03 ` Dale
2012-09-06 10:18 ` Neil Bothwick
2012-09-06 10:56 ` Dale
2012-09-06 10:41 ` Nicolas Sebrecht
2012-09-06 11:03 ` Dale
2012-09-06 11:37 ` Nicolas Sebrecht
2012-09-06 12:21 ` Dale
2012-09-06 13:27 ` Nicolas Sebrecht
2012-09-06 14:27 ` Dale
2012-09-06 10:11 ` Dale
2012-09-06 10:20 ` Neil Bothwick
2012-09-06 10:44 ` Dale
2012-09-06 11:11 ` Nicolas Sebrecht
2012-09-06 11:31 ` Dale
2012-09-06 12:17 ` Neil Bothwick
2012-09-06 12:44 ` Nicolas Sebrecht
2012-09-06 12:48 ` Dale
2012-09-06 13:04 ` Neil Bothwick
2012-09-06 14:07 ` Dale
2012-09-06 14:26 ` Michael Mol
2012-09-06 16:27 ` Dale
2012-09-07 7:56 ` Nicolas Sebrecht
2012-09-07 9:15 ` Nicolas Sebrecht
2012-09-07 12:25 ` Dale
2012-09-07 19:48 ` Neil Bothwick
2012-09-06 14:37 ` Neil Bothwick
2012-09-06 16:32 ` Dale
2012-09-06 20:21 ` Neil Bothwick
2012-09-06 14:51 ` Nicolas Sebrecht
2012-09-06 16:49 ` Dale
2012-09-06 13:46 ` Nicolas Sebrecht
2012-09-06 14:20 ` Dale
2012-09-06 14:33 ` Michael Mol
2012-09-06 16:39 ` Dale
2012-09-06 16:00 ` Paul Hartman
2012-09-06 16:44 ` Dale
2012-09-06 20:21 ` Neil Bothwick
2012-09-06 21:09 ` Dale
2012-09-06 22:38 ` Neil Bothwick
2012-09-06 23:08 ` Dale
2012-09-07 7:47 ` Nicolas Sebrecht
2012-09-07 12:35 ` Dale
2012-09-10 10:32 ` Nicolas Sebrecht
2012-09-10 11:13 ` Dale
2012-09-10 12:37 ` Michael Mol
2012-09-10 13:52 ` Dale
2012-09-10 14:02 ` Michael Mol
2012-09-10 14:22 ` Dale
2012-09-05 12:55 ` [gentoo-user] " Adam Carter
2012-09-05 15:28 ` Florian Philipp
2012-09-05 9:26 ` Neil Bothwick
2012-09-05 16:30 ` Volker Armin Hemmann
2012-09-05 17:02 ` Neil Bothwick
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