On 2019-Feb-15, Tomas Vondra wrote: > ISTM there's a couple of ways to deal with that: > > 1) Ignore the memory amounts entirely, and do just time-base eviction. > > 2) If we want some size thresholds (e.g. to disable eviction for > backends with small caches etc.) use the number of entries instead. I > don't think that's particularly worse that specifying size in MB.
Why is there a *need* for size-based eviction? Seems that time-based should be sufficient. Is the proposed approach to avoid eviction at all until the size threshold has been reached? I'm not sure I see the point of that. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
