Re: slow ZFS on FreeBSD 8.1
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I can tell you what the problem is right now, actually. ZFS performs very =
poorly on low performance CPUs (i.e. your Atom N330). Try the same system =
with a different CPU and you'll get a different result. It's not a lack of=
bandwidth on your bus, memory, or disks, and it's not exactly the checksum=
ming either (although that certainly contributes to the bottleneck), the gr=
ouping of transaction groups to be flushed to the disks is what your bottle=
neck is. I had an issue with some fairly poor performance with a Sempron 2=
800+ 45W TDP CPU and replacing it with an Athlon X2 did wonders. =20
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