I will change those, but I don't think this is that big of an issue if most of the IO is done by Postgres, since Postgres has it's own mechanism to tell the OS to sync the data to disk. For example when it's writing a wal file, or when it's writing a check point, those do not get cached.
Regards,
Strahinja
On Wed, Oct 10, 2012 at 4:38 PM, Shaun Thomas
<sthomas@optionshouse.com> wrote:
On 10/10/2012 09:35 AM, Strahinja Kustudić wrote:
#sysctl vm.dirty_ratio
vm.dirty_ratio = 40
# sysctl vm.dirty_background_ratio
vm.dirty_background_ratio = 10
shows that these values are even higher by default. When you said
RAID buffer size, you meant the controllers cache memory size?