On 12/31/2013 7:54 AM, Muhammad Yousuf Khan wrote: > i dont know why i am saying is even practical or not. > > here is my free command > > @thor:# free -g > total used free shared buffers cached > Mem: 31 31 0 0 0 26 > -/+ buffers/cache: 3 27 > Swap: 93 0 93 > > > as you can see 27GB is being used in caching. i have few 160GB SSDs. > can i move this buffers/caching load to my SSD. so that things could work > more better.
Muhammad, By design, the Linux kernel will use nearly all free memory for caching disk blocks and filesystem metadata when the memory isn't needed by other processes. When a process needs memory, the kernel simply drops some of the cached pages, freeing them for immediate use. This process takes a few tens of nanoseconds per 4KB page--it is instantaneous. It is because these pages can be freed instantly that Linux eats up all the RAM for cache. Cached file access is hundreds of times faster than disk access, even if disk is SSD. What you are seeing is the expected Linux kernel behavior. There is nothing wrong here, nothing to fix. -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/52c2ffeb.7010...@hardwarefreak.com
