view tests/fixtures/truncatedhistory.svndump @ 931:e1dbd9646d6a

svnwrap: use custom StringIO class in get_file() The wrappers were calling ra.get_file() with a cStringIO object. Empirically, svn 1.7.5 is writing 16kB blocks to the stream object, and cStringIO reallocates its internal buffer and doubles its size whenever it is filled. With large committed files this requires two large memory blocks at the same time. SimpleStringIO implements the mimimum StringIO interface used by ra.get_file() but instead stores all the blocks and "join" them at the end. It means more fragmentation but requires only one large block, without overallocation. Also, 16kB blocks should be friendly to most allocators. In practice, this simple change let me convert a revision containing multiple moderately large files, the largest being around 450MB, with a 32-bits Windows setup, python 2.7, swig svn 1.7.5, in stupid mode, while it was previously aborting with "not enough memory". The same revision still fails in replay mode.
author Patrick Mezard <patrick@mezard.eu>
date Sun, 16 Sep 2012 19:31:49 +0200
parents 3b60f223893a
children
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SVN-fs-dump-format-version: 2

UUID: a632509c-657a-43d2-ae0b-85387476b20e

Revision-number: 0
Prop-content-length: 56
Content-length: 56

K 8
svn:date
V 27
2008-11-11T19:00:25.260082Z
PROPS-END

Revision-number: 1
Prop-content-length: 114
Content-length: 114

K 7
svn:log
V 12
init project
K 10
svn:author
V 7
pmezard
K 8
svn:date
V 27
2008-11-11T19:00:25.322759Z
PROPS-END

Node-path: project1
Node-kind: dir
Node-action: add
Prop-content-length: 10
Content-length: 10

PROPS-END


Node-path: project2
Node-kind: dir
Node-action: add
Prop-content-length: 10
Content-length: 10

PROPS-END


Revision-number: 2
Prop-content-length: 106
Content-length: 106

K 7
svn:log
V 5
add a
K 10
svn:author
V 7
pmezard
K 8
svn:date
V 27
2008-11-11T19:00:26.173269Z
PROPS-END

Node-path: project1/a
Node-kind: file
Node-action: add
Prop-content-length: 10
Text-content-length: 2
Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3
Content-length: 12

PROPS-END
a


Revision-number: 3
Prop-content-length: 117
Content-length: 117

K 7
svn:log
V 15
rename project1
K 10
svn:author
V 7
pmezard
K 8
svn:date
V 27
2008-11-11T19:00:29.152593Z
PROPS-END

Node-path: project2/trunk
Node-kind: dir
Node-action: add
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Node-copyfrom-path: project1
Prop-content-length: 34
Content-length: 34

K 13
svn:mergeinfo
V 0

PROPS-END


Node-path: project1
Node-action: delete


Revision-number: 4
Prop-content-length: 106
Content-length: 106

K 7
svn:log
V 5
add b
K 10
svn:author
V 7
pmezard
K 8
svn:date
V 27
2008-11-11T19:00:30.178261Z
PROPS-END

Node-path: project2/trunk/b
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Node-action: add
Prop-content-length: 10
Text-content-length: 2
Text-content-md5: 3b5d5c3712955042212316173ccf37be
Content-length: 12

PROPS-END
b