ActiveRecord objects in hashes aren't garbage collected — a bug or a sort of caching feature?

Question

I have a simple ActiveRecord model called Student with 100 records in the table. I do the following in a rails console session:

ObjectSpace.each_obj         


        

Answer 1

i do not know the answer

But i tried inspecting the heap as given on http://blog.headius.com/2010/07/browsing-memory-jruby-way.html

Have attached a screenshot at, https://skitch.com/deepak_kannan/en3dg/java-visualvm it was a simple program

class Foo; end
f1 = Foo.new
f2 = Foo.new
GC.start

Then used jvisualvm as given above. Was running this in irb.
Seems as if jruby is tracking the object's scope. The object will not get GC'ed if there are any non-weak references to that object