Скачать или смотреть Why Virtual Memory Isn't Memory

We dive deep into virtual memory and distinguish it from physical memory such as RAM. Nate explains the importance of swap space, how it supplements physical memory, and why it’s slower than RAM due to additional disk IO overhead. We discuss best practices for using swap in various situations, including cloud instances and laptops, and provide insights on managing and configuring swap space. This tutorial offers practical guidance for technical decision-makers to optimize system memory performance.

Get Started with Red Hat Enterprise Linux: https://developers.redhat.com/register
Try it for yourself: https://redhat.com/interactive-labs

Tuned Interactive self-paced lab:
https://www.redhat.com/en/interactive...

Excellent article on how to set swappiness with maths to determine pagecache or anon page memory preference (by Chris Down from Meta):
https://chrisdown.name/2018/01/02/in-...

Commands used: free, vmstat, ps, top, swapon, pmap

00:00 Introduction to Virtual Memory
00:16 Understanding Physical Memory and Swap
00:57 Virtual Memory Explained
01:50 Performance Implications of Swap
03:01 Swap in Cloud Environments
04:53 Determining Swap Size
06:18 Managing Swap Space
07:49 Advanced Swap Techniques
08:59 Conclusion and Final Thoughts