On Sun, May 25, 2014 at 1:26 PM, Dimitris Karampinas <dkarampin@xxxxxxxxx> wrote:
My deployment is "NUMA-aware". I allocate cores that reside on the same socket. Once I reach the maximum number of cores, I start allocating cores from a neighbouring socket.
I'm not sure if it solves your issue, but on a NUMA environemnt and recent version of Linux kernel, you should try to disable vm.zone_reclaim_mode, as it seems to cause performance degradation for database workloads, see [1] and [2].
[1] http://www.postgresql.org/message-id/500616CB.3070408@xxxxxxxxxxxxxxx
[2] http://frosty-postgres.blogspot.com.br/2012/08/postgresql-numa-and-zone-reclaim-mode.html
Best regards,
--
Matheus de Oliveira
Analista de Banco de Dados
Dextra Sistemas - MPS.Br nível F!
www.dextra.com.br/postgres
Matheus de Oliveira
Analista de Banco de Dados
Dextra Sistemas - MPS.Br nível F!
www.dextra.com.br/postgres
