#5970: Weak references in Polynomial Ring cache
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Reporter: SimonKing | Owner: malb
Type: defect | Status: needs_work
Priority: critical | Milestone: sage-4.8
Component: commutative algebra | Keywords: polynomial ring
cache weak reference
Work_issues: regression for test_ec_leak? | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by SimonKing):
Interesting. Heapy shows (again with the example from the ticket
description) that most of the memory is filled by strings:
{{{
sage: H.heap()
Partition of a set of 479076 objects. Total size = 78965680 bytes.
Index Count % Size % Cumulative % Kind (class / dict of class)
0 228412 48 38602736 49 38602736 49 str
1 123581 26 10681888 14 49284624 62 tuple
2 1755 0 4241544 5 53526168 68 dict of module
3 4657 1 3835672 5 57361840 73 dict (no owner)
4 29863 6 3583560 5 60945400 77 function
5 29851 6 3582120 5 64527520 82 types.CodeType
6 3071 1 2974952 4 67502472 85 dict of type
7 3071 1 2759672 3 70262144 89 type
8 6651 1 1202264 2 71464408 91 list
9 937 0 922072 1 72386480 92 dict of class
<1072 more rows. Type e.g. '_.more' to view.>
}}}
What are these strings? Messages of cached exceptions (there is a ticket
concerning cached exceptions, but I can't find it right now)? Keys of
dictionaries? But then we should also see the corresponding values.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5970#comment:30>
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