Re: [HACKERS] wait events for disk I/O

On Mon, Mar 6, 2017 at 9:09 PM, Amit Kapila <amit.kapila16@gmail.com> wrote:
> Sure, if you think both Writes and Reads at OS level can have some
> chance of blocking in obscure cases, then we should add a wait event
> for them.

I think writes have a chance of blocking in cases even in cases that
are not very obscure at all.

>> I think somebody should try a pgbench run with this patch applied,
>> using a scale factor greater than shared_buffers, and generate a wait
>> event profile, just to see if these are showing up and how often.
>
> Yeah, that makes sense to me and we should try for both read-write and
> read-only tests.

wfm.

-- 
Robert Haas
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