Hi, On 2018-04-30 15:39:08 +0500, Andrey Borodin wrote: > I suspect that performance benefits can be not that big or even > marginal, if we do not extend comprehensive eviction strategy with > bgwriter fixes and O_DIRECT.
If so, then the improvements aren't real. Bgwriter doesn't matter for read-only workloads. O_DIRECT doesn't matter much if shared_buffers are 60+% of OS memory. And even disregarding that, you can just compute cache hit ratios to see whether things are improving. Greetings, Andres Freund
