Hi,

I'm getting this error while doing a git svn rebase in cygwin

Out of memory during "large" request for 268439552 bytes, total sbrk() is 140652544 bytes at /usr/lib/perl5/site_perl/Git.pm line 898, <GEN1> line 3.

268439552 is 256MB. Cygwin's maxium memory size is set to 1024MB so I'm guessing that it has a different maximum memory size for perl?

How can I increase the maximum memory size that perl programs can use?

update: This is where the error occurs (in Git.pm):

 while (1) {
      my $bytesLeft = $size - $bytesRead;
      last unless $bytesLeft;

      my $bytesToRead = $bytesLeft < 1024 ? $bytesLeft : 1024;
      my $read = read($in, $blob, $bytesToRead, $bytesRead); //line 898
      unless (defined($read)) {
         $self->_close_cat_blob();
         throw Error::Simple("in pipe went bad");
      }

      $bytesRead += $read;
   }

I've added a print before line 898 to print out $bytesToRead and $bytesRead and the result was 1024 for $bytesToRead, and 134220800 for $bytesRead, so it's reading 1024 bytes at a time and it has already read 128MB. Perl's 'read' function must be out of memory and is trying to request for double it's memory size...is there a way to specify how much memory to request? or is that implementation dependent?

UPDATE2: While testing memory allocation in cygwin: This C program's output was 1536MB

int main() {
   unsigned int bit=0x40000000, sum=0;
   char *x;

   while (bit > 4096) {
      x = malloc(bit);
      if (x)
         sum += bit;
      bit >>= 1;
   }
   printf("%08x bytes (%.1fMb)\n", sum, sum/1024.0/1024.0);
   return 0;
}

While this perl program crashed if the file size is greater than 384MB (but succeeded if the file size was less).

open(F, "<400") or die("can't read\n");
$size = -s "400";

$read = read(F, $s, $size);

The error is similar

Out of memory during "large" request for 536875008 bytes, total sbrk() is 217088 bytes at mem.pl line 6.