Remember Python - Memory Profiling in Python

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Information about Remember Python - Memory Profiling in Python

Published on March 12, 2014

Author: baraksch



Python memory profiling Barak Schiller

Your team wrote a python program to do station recommendations You run it After 10 min you machine grinds to a halt and a cryptic “out of memory” appears You go and make some coffee/tea So...

Memory management in python Once upon a time there were only references But then the reference cycles appeared and multiplied And then there was gc, and Guido saw that it was good

Code time!

More on GC Two triggers: manual and on allocation threshold Internally tracks all containers and looks for cycles Common wisdom is to run it once after your initialisation phase, then every so often Avoid __del__! (same as in Java)

memory_profiler module Adds a @profile annotate Uses psutil to track memory consumption Covers C-side allocations Supports plotting memory usage over time

Code time! Now actually running!

objgraph Generates object dependency graphs Useful when you want to crawl a specific object

Good old printf debugging What I ended up using was… printf! Wire up psutil into the python-core logger Get a basic memory usage throughout the application lifetime

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