Quoting "Michael S. Zick" <a...@morethan.org>:

> Could it be something as simple as network load?
> I don't recall your posting what NICs are on that box.
>
> Apache + NFS on an 8-core box can have a need to send a few packets. ;-)

Thanks for the suggestion.

We run Gigabit Ethernet with one adapter for dedicated SAN and the  
other adapter for Service traffic such as web.

The performance issue started when I upgraded the Gentoo build and  
applied AUFS. The network load is about the same post upgrade and is  
well within the limits of 100 Mbit.


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