UNIX for Dummies Questions & Answers

I've shell script where i used the below command to take the line which contains patterns.

Code:

sed -n "/$year 05:/,/$year 17:/p" trace.log | grep -f patterns.txt > output.log

This was working fine for long time, but now a days this script is not working with and throwing error like

sed: Couldn't re-allocate memory

when I looked for the file size its huge now a days, usually it will be less than or equal to 1.5 GB. but now a days its

Code:

$lt trace.log
 6.9G Aug 18 00:31 trace.log

trace.log is 6.9GB in size - so i conculded that the huge file size is the root cause of the issues. when i look in to the trace.log which 7 GB in size, its contains huge blank lines. i tired to remove the blank line using below commands but failed to perform and got the below error

Code:

 
$grep -av "^$" trace.log > ~/temp.tmp
$cat temp.tmp
Binary file trace.log matches
$sed '/^$/d' /logs/gopm/trace.log > ~/temp.tmp
sed: Couldn't re-allocate memory
$

Could you please suggest some other solution to over come this issue, appericaite your help
thanks
Senthil