Tuning Question

Cy Schubert Cy.Schubert at komquats.com
Sat Feb 10 22:31:04 UTC 2007

I have a question about tuning FreeBSD systems, specifically in regard to 
memory. At one time on Solaris systems it was recommended to keep scan rate 
below 200 pages per second. (Today it's 300 pages per second, dependent on 
the amount of memory, class of system.) Are there any recommendations or 
rules of thumb a person can use to determine when a memory upgrade is 
required? My machines are only busy during port builds when the scan rate 
can vary greatly and the page out rate could reach as high as two pages per 
second during brief periods. What kind of memory and paging metrics should 
I use on FreeBSD systems?

Cy Schubert <Cy.Schubert at komquats.com>
FreeBSD UNIX:  <cy at FreeBSD.org>   Web:  http://www.FreeBSD.org


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