Hey, I installed a new postgres 9.6 on both of my machines. I'm trying to measure the differences between the performances in each machine but it seems that the results arent accurate. I did 2 tests :
1)In the first test the scale was set to 100 : pgbench -i -s 100 -U postgres -d bench -h machine_name pgbench -U postgres -d bench -h machine_name -j 2 -c 16 -T 300 RUN TPS - machine1 TPS-machine2 1 697 555 2 732 861 3 784 842 2)In this test the scale was set to 10000 : pgbench -i -s 10000 -U postgres -d bench -h machine_name pgbench -U postgres -d bench --progress=30 -h machine_name -j 2 -c 16 -T 300 RUN TPS-MACHINE1 TPS-MACHINE2 1 103 60 2 63 66 3 74 83 4 56 61 5 75 53 6 73 60 7 62 53 In both cases after the initalization I restarted the database and cleared the cashe(echo 1 > /proc/sys/vm/drop_caches) one time. During all the runs I didnt shutdown the machine. Now, I was hopping the the tps will be almost the same in each machine for all the runs. In other words, I wanted to see that the tps in machine1 during all the tps are almost the same but I see that the values arent accurate. Any idea what might cause the differences in every run ?
