I was looking into this patch, overall patch looks good to me, I want to know what is the current state of this patch, is there some pending task in this patch ?
Patch was not applying on head so i have re based it and re based version is attached in the mail.
I have done some performance testing also..
Summary: --------------- 1. In my test for readonly workload i have observed some improvement for scale factor 1000. 2. I have also observed some regression with scale factor 300 (I can't say it's actual regression or just run to run variance), I thought that may be problem with lower scale factor so tested with scale factor 100 but with s.f. 100 looks fine.
Machine Detail: cpu : POWER8
cores: 24 (192 with HT)
Non Default Parameter: ------------------------ Shared Buffer= 30GB max_wal_size= 10GB max_connections=500