Clean up buffer and cached memory by defrag_mem

This command is very useful to free buffers when you face lack of memory issue. Free memory can be seen from the output of common linux command “free”: [root@leaseweb ~]# free total       used       free     shared    buffers     cached Mem:       1033972     987192      46780          0     159204     309176 -/+ buffers/cache:     518812     515160 Swap:      4192956         68    4192888
Continue reading…