May 2017
Intermediate to advanced
294 pages
7h 33m
English
Content preview from Apache Spark 2.x Cookbook
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Mark and sweep
JVM uses the mark and sweep algorithm for garbage collection. Mark and sweep collection consists of two phases.
During the mark phase, all the objects that have live references are marked alive, the rest are presumed candidates for garbage collection. During the sweep phase, the space occupied by the garbage collectable candidates is added to the free list, that is, they are available to be allocated to the new objects.
There are two improvements to mark and sweep. One is concurrent mark and sweep (CMS), and the other is parallel mark and sweep. CMS focuses on lower latency, while the latter focuses on higher throughput. Both strategies have performance trade-offs. CMS does not do compaction, while parallel garbage collector ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.