On 2018-04-30 14:59:31 +1200, Thomas Munro wrote: > Hi, > > In EXPLAIN (BUFFERS), there are two kinds of cache misses that show up > as "reads" when in fact they are not reads at all: > > 1. Relation extension, which in fact writes a zero-filled block. > 2. The RBM_ZERO_* modes, which provoke neither read nor write.
Just for understanding: 2) can never happen for buffers showing up in EXPLAIN, right? I'm not saying you shouldn't fix the accounting... Greetings, Andres Freund
