BSD 8.1 and 9.1 memory increase

[Meyer, Conrad]

From: Gumpula, Suresh [Suresh.Gumpula at netapp.com]
Sent: Wednesday, April 01, 2015 11:42 AM
To: Gumpula, Suresh; Meyer, Conrad; Garrett Cooper
Cc: freebsd-hackers at freebsd.org; alc at freebsd.org
Subject: Re: BSD 8.1 and 9.1 memory increase

I just tried the change you mentioned on unmapping unused entries , and
appears this saves good amount of real memory.  On my idle machine it
shows ~20M +  real memory savings. Specifically the inactive/wired pages
dropped down.
https://reviews.freebsd.org/D1263

And also drastic VSS size down for most of the processes.    Is this
incomplete or Can I take this change  ?

Thanks
Suresh

________________________________________

Hi,

The criticisms in the comments on that review are still perfectly valid. I would not use the patch as-is.

It is surprising that you see rsz reductions with it. I think it's probably an apples-to-oranges comparison and the application(s) have not been warmed up yet.

Best,
Conrad