pidstat-td-agent.sh

#!/bin/bash
#
# requires:
#  bash
#  cat, pidstat
#
set -e

LANG=C
LC_ALL=C

pidfile=/var/run/td-agent/td-agent.pid

[[ -f ${pidfile} ]] || {
  echo "no such file: ${pidfile}" >&2
  exit 1
}

pid=$(cat ${pidfile})
ps -p ${pid} >/dev/null || {
  echo "no such pid: ${pid}" >&2
  exit 1
}

pidstat -h -r -u -p ${pid} 1