Thanks Dan,
Can I consult with you even if the problem I have is not the problem of
circular references?
The expected work is clear, and natural I think:
1. A sqlobject is persistent in RDBMS,
2. and when I want to delete the object, it is freed from memory(and
cache), but its data is still persistent in RDBMS.
Here is a sample code:
obj_list = []
for i in xrange( 1000 ):
obj = SomeObject( parameters ... )
obj_list.append( obj ) # memory grows
for obj in obj_list:
obj.expire() # clear cache
del obj_list[:]
# expected work: clear memory, but data remain in RDBMS.
# actual work: memory doesn't seem to be cleared, data remain in RDBMS.
On Thu, 14 Sep 2006 22:04:19 +0300
Dan Pascu <[EMAIL PROTECTED]> wrote:
> On Thursday 14 September 2006 21:44, Oleg Broytmann wrote:
> > On Thu, Sep 14, 2006 at 09:38:59PM +0300, Dan Pascu wrote:
> > > BTW, what is the status on this? Do you intend to include it? If so,
> > > what is holding it back for so long?
> >
> > I didn't want to include in 0.7.1. I wanted to apply it after
> > releasing 0.7.1.
> > But now the question is - does it really help? Does the original
> > poster have a different problem not covered by the patch?
>
> It helps to take off the burden from the garbage collector by removing a
> known circular reference, which is a good thing to do in my opinion. The
> garbage collector knows how to deal with circular references, but that is
> just to protect programs against overlooked references, not to encourage
> programmers to grow careless and ignore them if they know about them.
>
> I do not know what problem the original poster has, but I'm guessing that
> he experiences something else, because the circular reference problem is
> not evident unless you also enable memory tracing, in which case the
> garbage collector no longer frees circular references. Else the garbage
> collector does its job and eliminates the referenced objects, but as I
> said with a performance penalty which can be avoided if the patch is
> applied.
>
> So even if the specific problem of the original poster is not solved by
> this patch, it doesn't mean that the patch is not useful. Removing the
> circular references that we know about is always a good thing to do and
> is also harmless.
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