Re: Perf Benchmarking and regression.

Hi,

On May 26, 2016 9:29:51 PM PDT, Ashutosh Sharma <ashu.coek88@gmail.com> wrote:
>Hi All,
>
>As we have seen the regression of more than 45% with
>"*backend_flush_after*"
>enabled and set to its default value i.e. 128KB or even when it is set
>to
>some higher value like 2MB, i think we should disable it such that it
>does
>not impact the read write performance and here is the attached patch
>for
>the same.  Please have a look and let me know your thoughts on this.
>Thanks!

I don't think the situation is quite that simple. By *disabling* backend flushing it's also easy to see massive
performanceregressions.  In situations where shared buffers was configured appropriately for the workload (not the case
hereIIRC).
 

Andres
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