Chuck Lever wrote:
> I was wondering what is the minimum number that it is safe to use? I'm
sure that you have already dealt with the side-effects/collateral
damages of this action, I don't want to fix a problem creating another
one..
As I said before, you can set it to 1, and that will mean background
flushing kicks in at 1% of your client's physical memory.
I think 5 is the minimum for dirty_ratio, although this doesn't seem to be
documented anywhere. If you want to set it lower, you have to use
dirty_bytes instead of dirty_ratio. See the commit message here:
http://lkml.org/lkml/2008/11/23/160
Documentation is in Documentation/sysctl/vm.txt.
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