In prior post in this series ( older posts: part1, part2, part3 ) I used simple integer increment shell test demonstrating that Amazon EC2 Linux instances exhibit inconsistent vCPU speeds whenever number of processes actively running on CPU becomes greater than half of available vCPU. 1,301 more words
Tags » Cpu Speed
In this blog post I will describe a simple shell script for measuring CPU consistency.
In my prior tests I used sqlplus sessions running a CPU-intensive SQL in parallel background processes. 1,230 more words
After discovering that in my prior tests there was significant variable factor of sqlplus session connect time (which still needs to be researched but this is for a later time), I decided to try and isolate this factor so that the test would be focused more on sql elapsed time as a measure of CPU performance. 995 more words