[gpfsug-discuss] NSD Server/FS Manager Memory Requirements

[Alex Chekholko]

Hi Aaron,

What would be the advantage of decreasing the pagepool size?

Regards,
Alex

On Thu, Aug 17, 2017 at 6:12 AM Knister, Aaron S. (GSFC-606.2)[COMPUTER
SCIENCE CORP] <aaron.s.knister at nasa.gov> wrote:

> Hi Everyone,
>
> In the world of GPFS 4.2 is there a particular advantage to having a large
> amount of memory (e.g. > 64G) allocated to the pagepool on combination NSD
> Server/FS manager nodes? We currently have half of physical memory
> allocated to pagepool on these nodes.
>
> For some historical context-- we had two indicidents that drove us to
> increase our NSD server/FS manager pagepools. One was a weird behavior in
> GPFS 3.5 that was causing bouncing FS managers until we bumped the page
> pool from a few gigs to about half of the physical memory on the node. The
> other was a mass round of parallel mmfsck's of all 20 something of our
> filesystems. It came highly recommended to us to increase the pagepool to
> something very large for that.
>
> I'm curious to hear what other folks do and what the recommendations from
> IBM folks are.
>
> Thanks,
> Aaron
>
>
>
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