December 2019
Intermediate to advanced
880 pages
28h 2m
English
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Chapter 7. Memory
Linux is a virtual memory–based system where each process has its own virtual address space, and mappings to physical memory are made on demand. Its design allows for over-subscription of physical memory, which Linux manages with a page out daemon and physical swap devices and (as a last resort) the out-of-memory (OOM) killer. Linux uses spare memory as a file system cache, a topic covered in Chapter 8.
This chapter shows how BPF can expose application memory usage in new ways and help you examine how the kernel is responding to memory pressure. As CPU scalability has grown faster than memory speeds, memory I/O has become the new bottleneck. Understanding memory usage can lead to finding many performance wins.
Learning Objectives: ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.