#!/bin/bash
# Ref - 8698p7p0e - custom check for A2 VPS with higher limit
#

MEMUSAGE=$(free | awk '/Mem/{printf("RAM Usage: %d\n"), $3/$2*100}'| awk '{print $3}')

if [[ "${MEMUSAGE}" -ge 95 ]]; then
  echo "CRITICAL: Memory Usage at ${MEMUSAGE}%"
  exit 2
elif [[ "${MEMUSAGE}" -ge 85 ]]; then
  echo "WARNING: Memory Usage at ${MEMUSAGE}%"
  exit 1
else
  echo "OK: Memory Usage at ${MEMUSAGE}%"
  exit 0
fi