Re: More info: 2.1.108 page cache performance on low memory

Stephen C. Tweedie
1998-07-23T17:16:41Z

Hi,

On 23 Jul 1998 12:59:38 +0200, Zlatko Calusic <Zlatko.Calusic@CARNet.hr>
said:

> As I see it, page cache seems too persistant (it grows out of bounds)
> when we age pages in it.

> One wrong way of fixing it is to limit page cache size, IMNSHO.

I_my_NSHO, it's an awful way to fix it: adding yet another rule to the
VM is not progress, it's making things worse!

> I tried the other way, to age page cache harder, and it looks like it
> works very well. Patch is simple, so simple that I can't understand
> nobody suggested (something like) it yet.

It has been suggested before, and that's why a lot of people have
reported great success by having page ageing removed: it essentially
lets pages age faster by limiting the number of ageing passes required
to remove a page (essentially this just reduces the age value down to
the page's single PG_referenced bit).

And yes, it should work fine.

--Stephen