Centos timed memory release script

Centos timed memory release script

The following is a script!

#! /Bin/bash
Used = 'free-m | awk 'nr = 2' | awk '{print $3 }''
Free = 'free-m | awk' NR = 2' | awk' {print $4 }''

Echo "===================================">/var/log/mem. log
Date>/var/log/mem. log
Echo "Memory usage | [Use :$ {used} MB] [Free :$ {free} MB]">/var/log/mem. log

If [$ free-le 100]; then
Sync & echo 1>/proc/sys/vm/drop_caches
Sync & echo 2>/proc/sys/vm/drop_caches
Sync & echo 3>/proc/sys/vm/drop_caches
Echo "OK">/var/log/mem. log
Else
Echo "Not required">/var/log/mem. log
Fi

Then join the task and execute it every 30 minutes.

Echo '*/30 ***** sh/bak/sh/freemem. Sh'>/var/spool/cron/root