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 <d...@atlas.cz>:
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> Finally I had enough time to find out, where is the main root of my
> memory leak.
>
> Consider two scenarios:
>
> 1. start web2py server
>
> 2. execute controller function with contents:
>
> def blah():
> return Storage(dict(nick=db.person[1].nick))
>
> p = cache.ram('blahblah',blah,time_expire=30)
>
> 3. guppy stats:
>
> Partition of a set of 119902 objects. Total size = 17240104 bytes.
> Index Count % Size % Cumulative % Kind (class / dict of class)
> 0 64658 54 5946560 34 5946560 34 str
> 1 24649 21 2172768 13 8119328 47 tuple
> 2 624 1 2091648 12 10210976 59 dict of gluon.dal.Field
> 3 706 1 888112 5 11099088 64 dict (no owner)
> 4 282 0 876912 5 11976000 69 dict of module
> 5 6701 6 804120 5 12780120 74 types.CodeType
> 6 6359 5 763080 4 13543200 79 function
> 7 652 1 571680 3 14114880 82 type
> 8 652 1 501280 3 14616160 85 dict of type
> 9 451 0 454984 3 15071144 87 dict of class
> <342 more rows. Type e.g. '_.more' to view.>
>
>
> 1. start web2py server
>
> 2. execute controller function with contents (nick is plain string):
>
> class Blah():
> def __init__(self):
> self.nick = db.person[1].nick
>
> p = cache.ram('blahblah',Blah,time_expire=30)
>
> 3. guppy stats:
>
> Partition of a set of 132222 objects. Total size = 21017568 bytes.
> Index Count % Size % Cumulative % Kind (class / dict of class)
> 0 69722 53 6343688 30 6343688 30 str
> 1 1248 1 4183296 20 10526984 50 dict of gluon.dal.Field
> 2 26193 20 2334008 11 12860992 61 tuple
> 3 756 1 987360 5 13848352 66 dict (no owner)
> 4 282 0 876912 4 14725264 70 dict of module
> 5 7056 5 846720 4 15571984 74 types.CodeType
> 6 6686 5 802320 4 16374304 78 function
> 7 654 0 573440 3 16947744 81 type
> 8 654 0 501840 2 17449584 83 dict of type
> 9 459 0 471048 2 17920632 85 dict of class
> <356 more rows. Type e.g. '_.more' to view.>
>
> Please, look at dict of gluon.dal.Field. In the second scenario the
> count is doubled, which means that db model remains in the memory twice,
> which is bad.
>
> I did not try the same with simplier model, so I do not have idea
> whether it matters.
>
> In my case it will not be too difficult to replace my own classes with
> dicts or Storages, but maybe the findings will help somebody else facing
> similar leak..
>
> Nice year to all :)
> David
>
> - --
> David Zejda, Open-IT cz
> web development & services
> http://www.o-it.info
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