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Sorry, of course $FN - I renamed the variables but missed that one. Rats!

Then, in order to sort of keep control over the loop count, don't deploy single file name variables but have them all in one var. No error checking is done (yet). Try
read ALLFILES
for FN in...

Are you aware that files may exist that have spaces in their file name?
Wouldn't a loop lend itself as a solution to this request, and an array with the file names?

Hello ajp7701,

I can see you said you are looking for exact string sysALive, but you showed in output as 3 when it comes sysAlive, so keeping this in mind and considering that it is not a typo....

awk '$3 !~ "999"' input.file > output.file

Fixing yours:

awk '{if ($3 != "999") print $0}' INPUT.TXT > OUTPUT.TXT

That has many an syntax error plus a logical one. Correcting the syntaxes awk '{if ($3==999) print $0}' fileyieldseee fff 999 555
aaa bbb 999 222 and shows the logical one. Try awk '$3!=999' file...

You could try this in bash:

#!/bin/bash
while true
do
while read pid mem
do
[ -z "${orig[pid]}" ] && orig[pid]=$mem
if [ $((orig[pid]*2)) -lt $mem ]
then
...