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Aaron Chen
erp5
Commits
86912b5c
Commit
86912b5c
authored
May 31, 2012
by
Vincent Pelletier
Committed by
Sebastien Robin
Aug 07, 2014
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Limit the amount of memory used when generating padding over sparse areas.
parent
0fbad18f
Changes
1
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1 changed file
with
7 additions
and
1 deletion
+7
-1
product/ERP5Type/BTreeData.py
product/ERP5Type/BTreeData.py
+7
-1
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product/ERP5Type/BTreeData.py
View file @
86912b5c
from
BTrees.LOBTree
import
LOBTree
from
persistent
import
Persistent
# Maximum memory to allocate for sparse-induced padding.
MAX_PADDING_CHUNK
=
2
**
20
class
PersistentString
(
Persistent
):
def
__init__
(
self
,
value
):
self
.
value
=
value
...
...
@@ -133,10 +136,13 @@ class BTreeData(Persistent):
for
key
in
tree
.
iterkeys
(
key
):
padding
=
min
(
size
,
key
-
next_byte
)
if
padding
>
0
:
write
(
'
\
x00
'
*
padding
)
next_byte
+=
padding
size
-=
padding
chunk_offset
=
0
while
padding
:
padding_chunk
=
min
(
padding
,
MAX_PADDING_CHUNK
)
padding
-=
padding_chunk
yield
'
\
x00
'
*
padding_chunk
else
:
chunk_offset
=
next_byte
-
key
if
size
==
0
:
...
...
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