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csavage-mdsol/gist:8e1bd423deac5be8f75f

Created November 12, 2014 18:45
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rbtrace JSON Heap Dump
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gistfile1.rb
# Provide the PID of a running rails process, and dump the heap to heap.json
# WARNING these can get pretty huge (~100MB)
# requries ruby 2.1 for shiny new ObjectSpace features
rbtrace -p <PID> -e 'Thread.new{require "objspace"; ObjectSpace.trace_object_allocations_start; GC.start(); ObjectSpace.dump_all(output: File.open("heap.json", "w"))}.join'
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