vfs.ufs.dirhash_maxmem ... how high can I go ?

[Gore Jarold]

On Wed, 15 Aug 2007, Gore Jarold wrote:

> Based on the previous discussion, I have decided to
up
> my dirhash_maxmem and also to start tracking its
usage
> over time ...
>
> I doubled it, then doubled again, then again ... and
> the system even hit the 16 MB ceiling.
>
> So now I have set it to 32 MB and we will see if the
> system can max that out.
>
> In the meantime, are there any unexpected
consequences
> of upping this value to 32 MB ?
>
> I have 4 GB of physical and 4 GB of swap, running on
> normal 32-bit x86, and I have this set as well:
>
> kern.maxdsiz="2572000000"
>
> any comments ?
>
> Also, now that we see that my dirhash usage is _very
> high_, any revised comments on the ability of these
> workloads to crash a machine that was at the 2 MB
> default ?


Ok, it just ht the 32 MB limit.

Bad things on the horizon if I up it further ?  Or
does my 4+4 GB memory and other details above make it
benign ?


       
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