Robert Milkowski wrote:
Hello Darren,
Monday, April 23, 2007, 9:14:35 PM, you wrote:
DRSC> The environment that it is running in has less memory than I've used
DRSC> it on with Solaris before, so I went to look at how to tune the ARC,
DRSC> only to discover that it had already been capped to roughly half the
DRSC> size of the kernel kmem map (which itself was about half the size
DRSC> of physical RAM) and my immediate thoughts were "why can't it
DRSC> be like this on Solaris?"
DRSC> Given that the topic of tuning the ARC size seems to be of concern
DRSC> for a few people, what are people's thoughts on choosing a better
DRSC> value as the default size for the ARC on Solaris?
I don't know. For file servers I actually want to almost all of
servers memory be consumed for caches.
When you use UFS or any other file systems - do you cap it's buffer
(page) cache? Similar experience should be with ZFS and in most
environments (I was dealing with) it is.
I've never had to because I've never had the same problem(s)
as with ZFS and it wanting to use "all the memory". Whatever
agreements UFS has with the kernel for buffer caches seem
to work quite well for me - especially in mixed role environments.
Darren
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