Re: [Ext2-devel] Re: inode cache, dentry cache, buffer heads usage

[Andrew Morton]

Badari Pulavarty <pbadari@xxxxxxxxxx> wrote:
>
> On Mon, 2005-03-14 at 14:11, Andrew Morton wrote:
> > Badari Pulavarty <pbadari@xxxxxxxxxx> wrote:
> > >
> > > On Thu, 2005-03-10 at 17:47, Andrew Morton wrote:
> > > > Badari Pulavarty <pbadari@xxxxxxxxxx> wrote:
> > > > >
> > > > > So, why is these slab cache are not getting purged/shrinked even
> > > > >  under memory pressure ? (I have seen lowmem as low as 6MB). What
> > > > >  can I do to keep the machine healthy ?
> > > > 
> > > > Tried increasing /proc/sys/vm/vfs_cache_pressure?  (That might not be in
> > > > 2.6.8 though).
> > > > 
> > > > 
> > > 
> > > Yep. This helped shrink the slabs, but we end up eating up lots of
> > > the lowmem in Buffers. Is there a way to shrink buffers ?
> > 
> > It would require some patchwork.  Why is it a problem?  That memory is
> > reclaimable.
> > 
> 
> Well, machine pauses for 5-30 seconds for each vi,cscope, write() etc.

Why?

> > How'd you get 1.8gig of lowmem?
> 
> 2:2 split
> 

Does a normal kernel exhibit the pauses?
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