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Date:	Thu, 15 Nov 2012 14:30:25 +0800
From:	JonY <jon_y AT users DOT sourceforge DOT net>
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To:	cygwin AT cygwin DOT com
Subject:	Re: xz -9 : Cannot allocate memory
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On 11/15/2012 13:37, Peter Rosin wrote:
> On 2012-11-15 05:40, marco atzeri wrote:
>> On 11/14/2012 11:09 PM, David Stacey wrote:
>>> I am trying to use 'xz -9' to compress a file, but the programme exits
>>> with the error message 'Cannot allocate memory'. Here's what I tried:
>>>
>>>
>>> $ echo Hello World > compress_me.txt
>>>
>>> $ xz -9 compress_me.txt
>>> xz: compress_me.txt: Cannot allocate memory
>>>
>>> $ xz --version
>>> xz (XZ Utils) 5.0.2
>>> liblzma 5.0.2
>>>
>>>
>>> Having read http://cygwin.com/cygwin-ug-net/setup-maxmem.html I tried
>>> the following:
>>>
>>>
>>> $ peflags --cygwin-heap /usr/bin/xz.exe
>>> /usr/bin/xz.exe: initial Cygwin heap size: 0 (0x0) MB
>>>
>>> $ peflags --cygwin-heap=3D1024 /usr/bin/xz.exe
>>> /usr/bin/xz.exe: initial Cygwin heap size: 1024 (0x400) MB
>>>
>>> $ xz -9 compress_me.txt
>>>
>>>
>>> And this worked. Is this the correct way to fix the problem? If so,
>>> please could we increment the heap size for xz in a post install script?
>>
>> a lot of programs have "Cygwin heap size: 0 (0x0) MB"
>> but they work anyway
>>
>> so the root cause is somewhere else.
>=20
> xz is notorious for its big up-front allocations, at least with some of
> the more aggressive options in effect.
>=20

The -9 option works for me without modifying Cygwin heap.




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