On Sat, Oct 3, 2020 at 6:20 AM Tomas Vondra <tomas.von...@2ndquadrant.com> wrote: > > Hello Vignesh, > > I've done some basic benchmarking on the v4 version of the patches (but > AFAIKC the v5 should perform about the same), and some initial review. > > For the benchmarking, I used the lineitem table from TPC-H - for 75GB > data set, this largest table is about 64GB once loaded, with another > 54GB in 5 indexes. This is on a server with 32 cores, 64GB of RAM and > NVME storage. > > The COPY duration with varying number of workers (specified using the > parallel COPY option) looks like this: > > workers duration > --------------------- > 0 1366 > 1 1255 > 2 704 > 3 526 > 4 434 > 5 385 > 6 347 > 7 322 > 8 327 > > So this seems to work pretty well - initially we get almost linear > speedup, then it slows down (likely due to contention for locks, I/O > etc.). Not bad. >
+1. These numbers (> 4x speed up) look good to me. -- With Regards, Amit Kapila.
