Month: November 2022 - the blog of Quantum Hosting®

The danger of a custom 404-page

One customer running a single WordPress was using a 4x vCPUs instance on Amazon AWS®. But the CPU and load usage were so high, with no apparent reasons (the number of visitors was reasonable). However: each 404 triggered a huge CPU and bandwidth consumption! A test was conducted and the 404 was replaced by a… read more »

Amazon AWS® bad discovery

This is the CPU monitoring usage on an EC2 instance in Ireland (t3a.xlarge). Two things to notice:-the graph has an average of 40% of white background (it does not reach the full 400% CPU height)-there was a maximum of 46% CPU steal – which is the red part (this should not be above 2%).In total:… read more »