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.
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