Re: Noticed something odd with pgbench

On Nov 16, 2012, at 11:59 AM, Richard Huxton <dev(at)archonet(dot)com> wrote:

> On 16/11/12 19:35, Shaun Thomas wrote:
>> Hey guys,
>>
>> So, we have a pretty beefy system that runs dual X5675's with 72GB of RAM. After our recent upgrade to 9.1, things have been... odd. I managed to track it down to one setting:
>>
>> shared_buffers = 8GB
>>
> Does this match what you're seeing?
>
> http://frosty-postgres.blogspot.co.uk/2012/08/postgresql-numa-and-zone-reclaim-mode.html
>

(Slightly OT from the OP's question, sorry)

Would this be worth referencing in the PostgreSQL documentation? I feel like I've read a lot of the documentation on Postgres tuning but this is news to me. And surprise surprise I'm running an affected system too! Maybe it deserves a more prominent warning, perhaps at http://www.postgresql.org/docs/9.2/interactive/performance-tips.html