On 06/06/10 18:58, Brad Diggs wrote:
> Apps that attempt to acquire a large amount of data on startup can fail
> to start properly if ZFS does not free
> up the memory fast enough.  I have observed this with Directory Server.

"Fast enough?"  The model I was expecting here was a bit more
synchronous than that -- someone asks for memory, the memory subsystem
asks ZFS to release some, and it does, which allows the request to be

I'd be interesting to know how time gets involved here at all.  If it
does, then I think that would make the "ZFS ARC should use all of memory
by default" scheme fairly problematic, as it would just intermittently
shoot down large processes.

Or just more fundamentally: needing to tune this at all seems a bit like
a bug to me.

James Carlson         42.703N 71.076W         <carls...@workingcode.com>
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