> On Sep 6, 2015, at 4:07 AM, Andres Freund wrote:
>
> To me that sounds like the negative impact of transparent hugepages
> being mitigated to some degree by zone reclaim mode (which'll avoid some
> cross-node transfers).
FWIW:
$ cat /sys/kernel/mm/transparent_hugepage/enabled
always madvise
Andres Freund writes:
> On 2015-09-04 15:37:47 -0700, Ben Chobot wrote:
>> Our situation might not apply to you. But if it does, give zone_reclaim_mode
>> a chance. It's not (always) as bad as others have made it out to be.
> To me that sounds like the negative impact of transparent hugepages
>
Hi,
On 2015-09-04 15:37:47 -0700, Ben Chobot wrote:
> So our load would hover under 10 most of the time, then spike to over 100 for
> a minute or two. Connections would get refused, the system would freeze up...
> and then everything would go back to normal. The solution? Turning on
> zone_recl
Over the last several months, I've seen a lot of grumbling about how
zone_reclaim_mode eats babies, kicks puppies, and basically how you should just
turn it off and live happily ever after. I thought I should add a
counterexample, because that advice has not proven very good for us.
Some facts
