collect memory information(free command and /proc/meminfo), and output in CSV format.

collect_mem.sh

#!/usr/bin/bash
#---------------------
# Copyright 2017 N.Fujita
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#---------------------
#NAME:     collect memory information(free command and /proc/meminfo), and output in CSV format.
#SYNOPSIS: ./collect_mem.sh
#DESCRIPTION:
#   Collect memory information from free command and /proc/meminfo.
#   And, collected information is outputted to a file in CSV format.
#   Exit with "Ctrl+c".
#   *You can modify the collect interval with "INTERAL" variable.
#---------------------

LANG=C
PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:
export LANG PATH
umask 022

LOGFILE_BASE="./meminfo"
LOGFILE="${LOGFILE_BASE}.`date '+%Y%m%d%H%M%S'`.csv"
INTERVAL=3

# Write header
echo -n '"DATE","TIME"' > ${LOGFILE}
echo -n ',"free-mem-total(kb)","free-mem-used(kb)","free-mem-free(kb)","free-mem-share(kb)","free-mem-buff/cache(kb)","available(kb)"' >> ${LOGFILE}
echo -n ',"free-swap-total(kb)","free-swap-used(kb)","free-swap-free(kb)"' >> ${LOGFILE}
awk '
    {
        printf ",\"%s(%s)\"",$1,$3
    }
    END{
        printf "\n"
    }' /proc/meminfo >> ${LOGFILE}


# Measure memory data(meminfo and free command)
while true
do
    # Write free command result
    free | awk '
        BEGIN{
            printf strftime("%Y/%m/%d, %H:%M:%S")
        }
	/^(Mem|Swap)/{
            for(i=2; i<= NF; i++){
                printf ",%d",$i
            }
        }
    ' >> ${LOGFILE}

    # Write meminfo data
    awk '
        {
            printf ",%d",$2
        }
        END{
            printf "\n"
    }' /proc/meminfo >> ${LOGFILE}

    # Interval
    sleep ${INTERVAL}
done
exit 0

Add ".csv" extension at the output file name.

Hi @Noppy! on line 23 "*You can modify the collect interval with "INTERAL" variable." You mean INTERVAL, correct?