Nearly every sysadmin has become familiar with the top command. It displays a list of the processes running on the System in a real-time dynamic interface. While Top is great without knowing much about it, adding some filtering and sorting…
As more and more systems move toward SSD disk, we are seeing much better swap performance as the disk IO is so much more performant. Additionally, as we move more and more of our systems to VPS cloud service providers…
When your Linux system is running low on memory, you can sometimes reclaim system memory by using the drop_caches command to free up memory that is being for caches. View Free Linux System Memory Using Top or Free You can…
Recently, I have been adding varnish to some of my websites to improve their performance. But in the end, how do I know if varnish is helping or not, or if it is helping, can varnish help more? Obviously you…
A few articles ago, I wrote about using the “apachebench” or “ab” utility to benchmark your website (see: apachebench). Ab is a great tool, but since then, I have found and fallen in love with a new tool for benchmarking…