I am curious Why the allocation to buffers for RAM, shown in Munin would increase dramatically. After a reboot the amount allocated to buffers shot up to 350Mb (of 1 Gb).
This is for a VPS on Linode, running Ubuntu, with several Wordpress blogs.
It had been going along at about 40Mb for buffers. There has been lots of unused RAM, so this change seems like a good one (now there is still about 100 Mb unused according to Munin - also top shows the same RAM info when I look there). It is also using a bit less swap than before (it wasn't using much but has now essentially gone to 0). But I don't know how it would happen all of a sudden? I had been working on various tweaks to my.cnf for MySQL a week or two ago. But the server was rebooted at least twice since any changes have been made to that or anything else I can think of that would potentially change the use of RAM.