I have a 12GB RAM VPS where I host a a couple of static websites , 2 small Magento powered stores and a couple of WordPress installations - overall nothing exciting and generally low traffic.
I've noticed though that my memory consumption is quite high - kindly have a look at the results of free m below:
total used free shared buffers cached Mem: 12306384 12137728 168656 0 753360 8629744 -/+ buffers/cache: 2754624 9551760 Swap: 1048564 104 1048460
Now I reckon that 9,5 GB seem to be buffer / cache related - however I find this quite high. Is this something I have to worry about or will they eventually free themselves ? (I've read it somewhere but I am certainly not an expert)
Another note on the side is that Memcached has been installed once and applied to one of my Magento installation - could it be related to it?
Some expert advise would be truly appreciated.