garbage collection questions

1. Is there a wiki entry about the GC somewhere that provides advice
about how to tune the GC using #setGCParameters?


2. If I have two objects with accessors:

Object subclass: #ObjectA
        instanceVariableNames: 'objectB'
        classVariableNames: ''
        poolDictionaries: ''
        category: 'Temp'

Object subclass: #ObjectB
        instanceVariableNames: 'objectA'
        classVariableNames: ''
        poolDictionaries: ''
        category: 'Temp'

and create an instance of each in a workspace and then set them up:

|a b|
a:=ObjectA new.
b:=ObjectB new.
a objectB: b.
b objectA: a.

and close the workspace then those instances of ObjectA & ObjectB will
never be garbage collected, correct?  Its my understanding that I'd need
to  nil out the instance variables of both instances to have them GCd as
they both refer strongly to each other.  Is that right?


3.  How can I learn when an incremental or full GC run will happen?  Is
it dependent upon on the size of new or old memory or the overall size
of the image or ... ? It seems like putting a #halt in a random spot
could easily lead to a stuck image.


Thanks for your help

Paul

On 26 Oct 2012, at 21:41, Paul DeBruicker <[hidden email]> wrote:

That's a circular reference and should be no problem for the garbage collector.
Unless something else holds either a or b, like the workspace, an inspector, a debugger.

--
Sven Van Caekenberghe
http://stfx.eu
Smalltalk is the Red Pill

On 27 October 2012 01:23, Sven Van Caekenberghe <[hidden email]> wrote: or "restore workspace contents" utility.

> --
> Sven Van Caekenberghe
> http://stfx.eu
> Smalltalk is the Red Pill



--
Best regards,
Igor Stasenko.