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Dear Massimo,
thank you for the reply, but Michele's advice makes no difference.
I just noticed that even this one leads to "the leak":
class Blah():
def __init__(self):
pass
def blah2():
return Blah()
p = cache.ram('blahblah',blah2,time_expire=30)
Since I avoid storing objects of classes declared in model or
controllers I do not have problems. But still I do not understand why
when I store such object in cache, whole copy of db model goes into
memory. IMO if there is no solution for the behaviour, at least the
danger should be emphasized in cache docs, because I doubt that anybody
would anticipate it.
Wising you a nice day!
David
mdipierro wrote:
> yes but you are not following Michele's advice. If you cache a record
> or a an object like a reference, you are storing in ram of copy db
> (the leak). You should cache values or dictionaries. As long as those
> values are not reference fields there should be no leaks.
>
> I am not sure the term leak is appropriate here. When you cache you
> store something and storage takes space, until you clear cache. The
> bigger the object you cache, the more space it takes.
>
> On Jan 3, 4:21 am, David Zejda <[email protected]> wrote:
> Hi,
>
> nick is not reference field. To make it sure that the issue is not
> dependent on the field definition I checked it with as simple Field as
> possible:
>
> Field('trustworthiness', 'double', default=0),
>
> defined in my model and added conversion to str:
>
> class Blah():
> def __init__(self):
> self.nick = str(db.person[1].trustworthiness)
>
> p = cache.ram('blahblah',Blah,time_expire=30)
>
> Also,
>
> def blah_f():
> return Blah()
>
> makes no change, leads to the same leak.
>
> The leak appears regardless to the place of the declaration of Blah
> class. I tried to declare it in top level of model, in controller, and
> inside function of controller, no difference.
>
> It is possible that this IMO weird behaviour is related to another issue
> which teased me months ago:
>
> http://www.mail-archive.com/[email protected]/msg34333.html
>
> With regards,
> David
>
>
>
> mdipierro wrote:
>>>> It depends on whether nick is a reference field.
>>>> On Jan 2, 5:31 pm, Michele Comitini <[email protected]>
>>>> wrote:
>>>>> what if you do this?
>>>>> class Blah():
>>>>> def __init__(self):
>>>>> self.nick = db.person[1].nick
>>>>> def blah_f():
>>>>> return Blah()
>>>>> p = cache.ram('blahblah', blah_f,time_expire=30)
>>>>> 2011/1/2 David Zejda <[email protected]>:
- --
David Zejda, Open-IT cz
web development & services
http://www.o-it.info
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