How to read a very large file??

[sivasakthi]

Hi Guys,

I have  a very large  file. It may be contain 1lac lines..  also it
length is increased in dynamically..
Each time ( per 5 min) i need to read the contents from file & do some
work ..  Suppose i have read the lines for first 5 min then  after some
time it reads the  same line also , so it  take more time & it is a
waste of time..

The code is following,

open FF, "/tmp |" || die "can't access log file\n";
while (<FF>)
{
    chomp;
    // do some work..
}
close(FF)


Could u help me to solve the pbm??


Thanks,
Siva