Output the number of files used by several processes to the command line every 5 seconds.

proc-ulimit-usage-summary.sh

while true; do
TIMESTAMP=`date "+%Y-%m-%d %H:%M:%S"`

x1=`ps aux | grep "[v]ar.www.bin.asteriskPhoneEventProducer.js" | pcregrep -o1 "^root\s+(\d+)\s"`
x2=`ps aux | grep "[v]ar.www.bin.phoneEventProcessor.js" | pcregrep -o1 "^root\s+(\d+)\s"`
x3=`ps aux | grep "[v]ar.www.bin.phoneEventCoordinator.js" | pcregrep -o1 "^root\s+(\d+)\s"`
x4=`ps aux | grep "[v]ar.www.bin.app.js" | pcregrep -o1 "^root\s+(\d+)\s"`
x5=`ps aux | grep "[v]ar.www.bin.http.phone.event.producer.js" | pcregrep -o1 "^root\s+(\d+)\s"`

all=`lsof -i -n -P | grep "nodejs" | wc -l`
c1=`lsof -i -n -P | grep "nodejs.*$x1" | wc -l`
c2=`lsof -i -n -P | grep "nodejs.*$x2" | wc -l`
c3=`lsof -i -n -P | grep "nodejs.*$x3" | wc -l`
c4=`lsof -i -n -P | grep "nodejs.*$x4" | wc -l`
c5=`lsof -i -n -P | grep "nodejs.*$x5" | wc -l`

echo "$TIMESTAMP -- Total: $all  AstFor: $c1  Producer0: $c2  Coord: $c3  App: $c4   HttpEv: $c5"
sleep 5

done

Created to monitor which of my node processes was leaking sockets over time...

Output looks like this:
Just edit the name of processes asteriskPhoneEventProducer, and potentially set root to the name of the user that runs the process.

2014-03-04 09:14:47 -- Total: 136  AstFor: 27  Producer0: 7  Coord: 72  App: 136   HttpEv: 8
2014-03-04 09:14:53 -- Total: 136  AstFor: 27  Producer0: 7  Coord: 72  App: 134   HttpEv: 8
2014-03-04 09:14:58 -- Total: 136  AstFor: 27  Producer0: 7  Coord: 72  App: 136   HttpEv: 8
2014-03-04 09:15:04 -- Total: 136  AstFor: 27  Producer0: 7  Coord: 72  App: 136   HttpEv: 8
2014-03-04 09:15:09 -- Total: 130  AstFor: 27  Producer0: 7  Coord: 72  App: 131   HttpEv: 8
2014-03-04 09:15:15 -- Total: 130  AstFor: 27  Producer0: 7  Coord: 69  App: 130   HttpEv: 8