svn commit: r254544 - head/sys/vm

[Scott Long]

On Aug 19, 2013, at 5:54 PM, Jeff Roberson <jeff at FreeBSD.org> wrote:

> Author: jeff
> Date: Mon Aug 19 23:54:24 2013
> New Revision: 254544
> URL: http://svnweb.freebsd.org/changeset/base/254544
> 
> Log:
>   - Increase the active lru refresh interval to 10 minutes.  This has been
>     shown to negatively impact some workloads and the goal is only to
>     eliminate worst case behaviors for very long periods of paging
>     inactivity.  Eventually we should determine a more complex scaling
>     factor for this feature.
>   - Rate limit low memory callback handlers to limit thrashing.  Set the
>     default to 10 seconds.

A more primitive version of this was tested at Netflix and found to be very advantageous.  Thanks for turning it into a more polished thing.

Scott