From the topic above, you may have remembered one of our former post “what data is cached by operation system“. This is a similar tool as Fincore, but it’s more powerful. It’s written in C and supports UNIX and unix-like systems.

In one of our former post, we have a way to check what type of data is cached by our operating system. Is there a way for us to release memory from Linux like what we can do in Windows?

Facebook released a kernel module called Flashcache this wednesday, which is used to speed up MySQL by caching data in faster media like SSD disks.  It’s only tested for kernel versions 2.6.18 and 2.6.20.

In a former post, we know that with the help of defrag_mem we can clean up buffers / cached memory to gain more real “free” memory. Defrag_mem works like common windows memory optimizer, it asks for as much memory as possible, and then free them all. This way is not suggested on productive [...]

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     [...]