Re: checkpointer continuous flushing - V18

> I did a quick & small test with random updates on 16 tables with 
> checkpoint_flush_after=16 checkpoint_timeout=30

Another run with more "normal" settings and over 1000 seconds, so less 
"quick & small" that the previous one.
 checkpoint_flush_after = 16 checkpoint_timeout = 5min # default shared_buffers = 2GB # 1/8 of available memory

Random updates on 16 tables which total to 1.1GB of data, so this is in 
buffer, no significant "read" traffic.

(1) with 16 tablespaces (1 per table) on 1 disk : 680.0 tps    per second avg, stddev [ min q1 median d3 max ] <=300tps
  679.6 ± 750.4 [0.0, 317.0, 371.0, 438.5, 2724.0] 19.5%
 

(2) with 1 tablespace on 1 disk : 956.0 tps    per second avg, stddev [ min q1 median d3 max ] <=300tps    956.2 ±
796.5[3.0, 488.0, 583.0, 742.0, 2774.0] 2.1%
 

-- 
Fabien.