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Cc: dougb@freebsd.org, freebsd-gnome@freebsd.org, freebsd-ports@freebsd.org
Subject: Re: UPDATING 20110730
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Andriy Gapon <avg@freebsd.org> wrote:

> If for X ports all the relevant data under /var/db/pkg fits into
> fs cache, then the performance may be blazing, but once you exceed
> the cache size the performance might become totally different.

and/or the poorly-performing system may have enough less memory than
the other for paging/swapping to be a factor.