Andi Kleen wrote on Thursday, August 04, 2005 3:54 PM
> > This might be too low on large system. We usually stress shm pretty hard
> > for db application and usually use more than 87% of total memory in just
> > one shm segment. So I prefer either no limit or a tunable.
>
> With large system you mean >32GB right?
Yes, between 32 GB - 128 GB. On larger numa box in the 256 GB and upward,
we have to break shm segment into one per-numa-node and then the limit
should be OK. I was concerned with SMP box with large memory.
> I think on a large systems some tuning is reasonable because they likely
> have trained admins. I'm more worried on reasonable defaults for the
> class of systems with 0-4GB
Sounds reasonable to me.
- Ken
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