#!/bin/sh

sigterm()
{
  echo "******memopt is killed, I want back******"
  exit 1
}

trap sigterm TERM

start_time=$(date +%s)
while true; do
  echo 3 > /proc/sys/vm/drop_caches
  echo 1 > /proc/sys/vm/compact_memory
  end_time=$(date +%s)
  elapsed_time=$(($end_time -$start_time))
  if [ "$elapsed_time" -ge 35 ]; then
    # 5 sec for slow scheduling tolerance.
    # 35 sec = 20 sec sleep interval + 3 * 5.
    echo "Slow response, thrashing? recover..."
    stop catawampus
    sleep 5
    start catawampus
  fi
  start_time=$(date +%s)
  sleep 20
done