PostgreSQL 10 High Performance - Third Edition

Running pgbench manually

As a simple example of running a test, you could execute only the SELECT test for a small number of transactions. Here's a quick test from the sample server:

$ pgbench -S -c 4 -t 20000 pgbench 
starting vacuum...end. 
transaction type: SELECT only 
scaling factor: 10 
query mode: simple 
number of clients: 4 
number of threads: 1 
number of transactions per client: 20000 
number of transactions actually processed: 80000/80000 
tps = 17070.599733 (including connections establishing) 
tps = 17173.602799 (excluding connections establishing) 

This is simulating the situation where four database clients are all active at the same time and continuously asking for data. Each client runs until it executes the requested number of transactions. ...