Re: [RFC][PATCH] update /proc/sys/vm/drop_caches documentation

[Dave Hansen]

On Wed, 2010-09-15 at 11:37 -0700, Eric W. Biederman wrote:
> > I'm worried that there are users out there experiencing real problems
> > that aren't reporting it because "workarounds" like this just paper over
> > the issue.
> 
> For what it is worth.  I had a friend ask me about a system that had 50%
> of it's memory consumed by slab caches.  20GB out of 40GB.  The kernel
> was suse? 2.6.27 so it's old, but if you are curious.
> /proc/sys/vm/drop_caches does nothing in that case. 

Was it the reclaimable caches doing it, though?  The other really common
cause is kmalloc() leaks.

-- Dave

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