On Wed, 09 Feb 2005 14:10:42 -0800, Jeff Rizzo wrote:

> Hubert Feyrer wrote:
> 
>> On Wed, 9 Feb 2005, Frank van der Linden wrote:
>>
>>> (if stable). I'm glad to see that we kick ass in the single-CPU
>>> case.
>>
>>
>> Um, have you looked at the 10M Row test?
>> http://www.newsforge.com/blob.pl?id=82311a9e7896a841032c395f270d6a0f
>> Why so we not kick ass there at all?
>>
>>
>>  - Hubert
>>
> 
> Well, I'm not really sure, since this is pretty far outside my area of 
> expertise, but since he claims the Solaris numbers on the 10M row test 
> were also horrid until turning off some FS cacheing, I wonder if tuning 
> the VM system might help some.  I just sent the author a link to Arto 
> Selonen's VM tuning page 
> (http://www.selonen.org/arto/netbsd/vm_tune.html) in hopes that he might 
> be able to squeeze some better numbers out of it...

I don't think that's the reason. He explicitely says that NetBSD wasn't
swapping at all, so turning the caching off wouldn't help IMHO.

But, doesn't NetBSD need to read data to cache when they are rewritten,
since UBC was introduced? Could this explain that behaviour?

Bye	Pavel