FreeBSD 9.0 hangs on heavy I/O

Kees Jan Koster kjkoster at
Tue May 29 21:30:50 UTC 2012

Dear Freddie,

> Granted, I haven't played with gsched yet (most of our high-I/O
> systems are ZFS), so there may be a way to use it across-GEOMs.

From my previous experiments ZFS suffers the same fate when there is heavy write activity. Reads just don't get served in time.

How do you deal with that?
Kees Jan
kjkoster at

Change is good. Granted, it is good in retrospect, but change is good.

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