grep: memory exhausted
rwatson at FreeBSD.org
Thu Nov 30 02:32:26 PST 2006
On Wed, 29 Nov 2006, Kris Kennaway wrote:
> On Wed, Nov 29, 2006 at 03:10:33PM -0500, van Osnabrugge, Sean wrote:
>> I am running a fresh install of FreeBSD-6.1-Stable as a guest OS in VMWare
>> 1.0.1 with 1 GB of RAM.
>> Whenever I try to grep a large text file (400 MB+), grep terminates with
>> "grep: memory exhausted"
>> I have tried piping grep (cat "file" | grep "search term")
>> I have tried it with -line-buffered
>> ulimit -a show:
>> core file size (blocks, -c) unlimited
>> data seg size (kbytes, -d) 524288
> Try increasing this. I think grep mmaps the file, so the large file could
> be exceeding your limit.
I regularly grep multi-hundred-gigabyte files without a problem on boxes with
very little memory, so simple file size is unlikely the cause. However, it
would be interesting to know how many lines "wc -l" thinks the text file has,
and what the length of the longest line is.
Robert N M Watson
University of Cambridge
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