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Old 09-16-2013, 07:18 AM   #1
jojanmpaul
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grep: memory exhausted


Command used,

grep -v -f fileToExclude.txt ContentFileList.txt > ContentFileList_out.txt

Error thrown,

grep: memory exhausted

the files has more than o.1 million lines and more over this command consumes 100% of CPU and 60-70% of memory.

and,

grep --version
GNU grep 2.6.3

rpm -qa | grep grep
grep-2.6.3-3.el6.i686

I need the solution for 'memory exhausted' and 'CPU and memory conception'.
 
Old 09-16-2013, 07:46 AM   #2
pan64
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try to sort both input files and you can implement a simple filter in perl or awk or ...
 
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Old 09-16-2013, 10:45 PM   #3
jpollard
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As referenced above - sort the files. Once sorted you can filter them using comm - which allows you to identify common/differences between the two files and output what you want. Refer to the manpage on comm.
 
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Old 02-04-2014, 03:09 AM   #4
jojanmpaul
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Quote:
Originally Posted by pan64 View Post
try to sort both input files and you can implement a simple filter in perl or awk or ...
Spit the files is also useful to achieve this but time consuming...
 
Old 02-04-2014, 09:06 AM   #5
jpollard
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The only times I've run across the "memory exhausted" message has been when scanning a file of data extracted from a Microsoft Office file... which had one line per paragraph, with VERY long paragraphs.

But I was not using a file to hold the patterns... How many patterns are in that file (fileToExclude.txt)?
 
  


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