Hi Fabien,
On 2015-06-01 PM 08:40, Fabien COELHO wrote:
>
> Turning "checkpoint_flush_to_disk = on" reduces significantly the number
> of late transactions. These late transactions are not uniformly distributed,
> but are rather clustered around times when pg is stalled, i.e. more or less
> unresponsive.
>
> bgwriter_flush_to_disk does not seem to have a significant impact on these
> tests, maybe because pg shared_buffers size is much larger than the database,
> so the bgwriter is seldom active.
>
Not that the GUC naming is the most pressing issue here, but do you think
"*_flush_on_write" describes what the patch does?
Thanks,
Amit