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Message-ID:	<50A52E26.7070007@tiscali.co.uk>
Date:	Thu, 15 Nov 2012 18:02:14 +0000
From:	David Stacey <drstacey AT tiscali DOT co DOT uk>
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To:	cygwin AT cygwin DOT com
Subject:	Re: xz -9 : Cannot allocate memory
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On 15/11/12 06:30, JonY wrote:
> 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=1024 /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.
>> xz is notorious for its big up-front allocations, at least with some of
>> the more aggressive options in effect.
>>
> The -9 option works for me without modifying Cygwin heap.
>

Thank you all for your help. I have repeated the above test using 
/usr/i686-pc-mingw32/sys-root/mingw/bin/xz -9 and this worked OK. This 
is the same version of xz (5.0.2), but compiled up using mingw (and 
therefore presumably not using cygwin1.dll).

If it helps in reproducing this problem, I am /still/ using Windows XP 
Pro SP3.

Many thanks,

Dave.



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