March 2019
Intermediate to advanced
242 pages
6h 21m
English
Content preview from Java 11 and 12 – New Features
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ZGC heap
ZGC divides memory into regions, also called ZPages. ZPages can be dynamically created and destroyed. These can also be dynamically sized (unlike the G1 GC), which are multiples of 2 MB. Here are the size groups of heap regions:
- Small (2 MB)
- Medium (32 MB)
- Large (N * 2 MB)
ZGC heap can have multiple occurrences of these heap regions. The medium and large regions are allocated contiguously, as shown in the following diagram:
Unlike other GCs, the physical heap regions of ZGC can map into a bigger heap address space (which can include virtual memory). This can be crucial to combat memory fragmentation issues. Imagine that you can ...
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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.