On Tue, 25 Nov 2003, Hendrik Visage wrote:
> On Tue, Nov 25, 2003 at 10:07:56AM -0500, AndyLiebman@xxxxxxx wrote:
> > A puzzle.
> > I have a P4-3.06 with 1 GB RAM. I have hyperthreading enabled -- and
> > Mandrake
> > 9.2 (2.4.22 kernel) shows that I have 2 CPUs.
>
> I've seen similar troubles with the SuSE kernels. I believe it has
> something to do with some of the desktop/interactive patches that fills
> up memory too much before flushing caches.
>
> > Although data is coming into my Linux machine at a rate of 18 MB/sec, I
> > don't
> > see any disk activity for as much as 30 or 40 seconds after I begin
> > recording
> > video. Looking at XOSVIEW, I can see on the memory display that the cache
> > fills up until my memory is almost entirely full, and ONLY THEN does the
> > disk
> > writing activity begin.
> >
> > Usually this is fine, but once in a while -- after capturing video for 20
> > minutes or so, the system will have a "hiccup" and fail to write data fast
> > enough. My video editing application will then stop capturing. I don'
>
> Play with the settings of:
> sysctl -a | grep vm.bdflush
> vm.bdflush = 30 500 0 0 500 3000 60 20 0
>
> I've found the right settings would alleviate this hiccup issue.
Is there any guidance or documentation on how to set those values?
--
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Lonni J Friedman netllama@xxxxxxxxxxxxx
Linux Step-by-step & TyGeMo http://netllama.ipfox.com
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