Re: UPDATEDs slowing SELECTs in a fully cached database

lars hofhansl  wrote:
 
> Yep, I am not seeing the SELECTs slow down (measurably) during 
> checkpoints (i.e. when dirty pages are flushed to disk), but only
> during writing of the WAL files.
 
How about if you do a whole slew of the UPDATEs and then stop those
and run a bunch of SELECTs?  (I don't think I've seen anything
mentioned so far which rules out hint bit rewrites as an issue.)
 
I see you have tweaked things to balance the writes -- you might
want to try further adjustments to reduce backend writes and see
what happens.
 
-Kevin