July 2016
Intermediate to advanced
150 pages
4h 24m
English
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Setting Metaspace Size
In addition to heap space, the JVM allocates multiple chunks of memory for things that need to be stored off heap. This includes I/O buffers, thread stacks, compiled code, and metaspace. The total memory footprint of a JVM process is the sum of the memory footprint for each of these components.
Metaspace contains metadata about the application the JVM is running. It contains class definitions, method definitions, and other things like that. The more classes you load into your app, the larger metaspace will be. Most JVM processes require only 40 to 50 megabytes for metaspace, but JRuby must load the entire Ruby standard library into memory at runtime, which moves its grand total a bit higher. A typical JRuby on Rails ...
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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.