Quick fix for logstash slowdowns

logstash.sh

#!/bin/sh

MAILTO=root

PID=`ps aux | grep logstash | grep java | grep agent | awk '{print $2}'`
LLEN=`redis-cli LLEN logstash`
LLENMAX="50"

if [ "x$PID" = "x" ]; then
        PID=-1
fi

if [ $PID -eq -1 ]; then
        echo "Logstash not running"
        exit 1
else
        if [ $LLEN -gt $LLENMAX ]; then
                kill $PID
                logger "Killed logstash PID $PID because redis LLEN exceeds $LLENMAX @ $LLEN"
        fi
        exit 0
fi