[Haifux] some additions and eratta to today's lecture
choo at actcom.co.il
Mon Mar 21 22:42:23 MSK 2011
On Mon, 2011-03-21 at 14:26 +0200, Nadav Har'El wrote:
> On Tue, Mar 15, 2011, guy keren wrote about "[Haifux] some additions and eratta to today's lecture":
> > 1. etzion asked about controlling the age of dirty pages before pdflush
> > flushes them - the default value is 30 seconds, and can be seen by:
> > cat /proc/sys/vm/dirty_expire_centisecs
> > (the time there is in milli-seconds). it can be changed by echoing
> > the desired time into that file, e.g. to change it to 40 seconds:
> > echo 40 > /proc/sys/vm/dirty_expire_centisecs
> Would I be wrong to assume that since the file name is "centisecs", it is
> indeed centisecs (1/100th of a second), neither milli-seconds nor seconds
> as you wrote above?
err.. you're right.
the default value is '3000', which amounts to 30 seconds,
so to set it to 40 seconds - one should echo "4000" into that file.
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