On the server with Linux OS if you observe that lot of the memory is being cached.. Like shown below
total used free shared buffers cached
Mem: 12155 11741 414 0 303 5830
-/+ buffers/cache: 5608 6547
Swap: 24999 0 24999
You can free up the memory cache using the below commands
To free pagecache:
[root@Supp0rtAdmin]# echo 1 > /proc/sys/vm/drop_caches
To free dentries and inodes:
[root@Supp0rtAdmin]# echo 2 > /proc/sys/vm/drop_caches
To free pagecache, dentries and inodes:
[root@Supp0rtAdmin]# echo 3 > /proc/sys/vm/drop_caches
You can atomize this task by simply creating the file Clear_Memory_Cache.sh with the following code in it
[root@server123]# cd /etc/cron.hourly/
[root@server123]# vi Clear_Memory_Cache.sh
#!/bin/sh
sync; echo 3 > /proc/sys/vm/drop_caches
And restart crond dameon
[root@server123]# /etc/init.d/crond restart
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