December 15 2011.
Ruby memory leak.
Do you have any questions feedback or an interesting memory leak debugging story.
Is there an obvious.
Valgrind is an application for detecting c based memory leaks and race conditions.
Checks for memory leaks of gems in gemfile lock.
5 debugging memory leaks.
The best tool to find leaky gems in your dependencies.
Audit a project s gemfile lock.
There are few tools available however none of them works with native mri ruby 1 9 3p194.
If you believe your application has a memory leak you can test this out.
Now you know what a memory leak looks like hopefully that will help you find one faster if you ever have this issue.
A ruby application on rails or not can leak memory either in the ruby code or at the c code level.
Reviewing the free memory analysis tools for mri and jruby and mentioning rubinius jonathan wallace.
Prior to ruby 2 1 the best we could do was crawl our object space grab a snapshot wait a bit grab a second snapshot and compare.
Debugging memory leaks in ruby.
Make sure memory leaks are not in your gem dependencies.
This is a parser that gem some html pages and scrape them but it eat a lot of memory not being garbage collected.
If you are hunting a simple memory leak in ruby i recommend my earlier article from 2015 most of it still holds.
Comparing to webrick it eats 100 more resources.
A memory leak is defined as memory increasing indefinitely over time.
This pass the result to a form.
How to debug profile ruby.
The new tooling in ruby 2 1 and up makes debugging these leaks a breeze.
To simply print the current ruby script memory usage in the system you can use this function.
Thin web server is actually a big memory consumer it is not thin anymore.
Unlike unmanaged memory leaks tackling managed leaks is very straight forward.
Btw ruby 2 4 1 has a known memory leak so you may want to upgrade if you are using this specific version.
Debugging memory leaks in ruby jonathan wallace december 15 2011 programming 3 380.
In this section you will learn how to find and fix such leaks by using tool such as valgrind.
Here the memory usage happens.
If you have any interesting battle stories or tools i have forgotten to mention you would like to share please post a comment.
Most applications that have memory problems are defined as having a memory leak however if you let those applications run for a long enough period of time the memory use will level out.
