linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Martin.Knoblauch" <Martin.Knoblauch@TeraPort.de>
To: Jonathan Morton <chromi@cyberspace.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: VM: Buffer vs. Cache
Date: Tue, 19 Jun 2001 09:27:42 +0200	[thread overview]
Message-ID: <3B2EFEEE.18DEEC02@TeraPort.de> (raw)
In-Reply-To: <l0313032ab74670af4963@[192.168.239.105]>

Jonathan Morton wrote:
> 
> >
> > So, what actually is the difference between Buffered and Cached.
> >Apparently quite a lot of the pages that are Cached in the evening are
> >Buffered 9 houres later.
> 
> Think about what happens in the meantime.  Most distros install maintenance
> scripts which run late at night (usually at midnight and/or 4am), which
> perform heavy disk activity as they update databases and scan for
> file-permissions security holes.  Heavy disk activity usually means an
> increase in buffer utilisation.  Since most files are only "touched" once,
> the cache is shrunk as it aren't being used very much.
> 

 thanks to all who set me straight. Should have thought of the nightly
stuff myself.

Martin
-- 
------------------------------------------------------------------
Martin Knoblauch         |    email:  Martin.Knoblauch@TeraPort.de
TeraPort GmbH            |    Phone:  +49-89-510857-309
C+ITS                    |    Fax:    +49-89-510857-111
http://www.teraport.de   |    Mobile: +49-170-4904759

      reply	other threads:[~2001-06-19  7:28 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-08 11:23 VM: Buffer vs. Cache Martin.Knoblauch
2001-06-08 12:10 ` Jonathan Morton
2001-06-19  7:27   ` Martin.Knoblauch [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=3B2EFEEE.18DEEC02@TeraPort.de \
    --to=martin.knoblauch@teraport.de \
    --cc=chromi@cyberspace.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).