Gilad Ben-Yossef wrote:
- As a first stage, disable the swap.
This doesn't make much sense to me. What is it suppose to achieve?
It is SUPPOSED to achieve less memory to keep track of. As far as I
understand it, the kernel keeps track over which virtual pages reside in
which physical location, and therefor swap pages are being tracked not
all that differently than physical memory. I might as well have told
them to reduce the amount of physical memory to 8GB to achieve the same
goal.
And, yes, 8GB would probably be enough for the server to do what it's
supposed to do.
Of course, I could be wrong. That's why I'm asking here :-)
Basically, you need enough free space in LowFree, for some definition
of "enough".
That's what I thought. Too bad Munin doesn't track that particular
value, nor does top display it. In fact, for a value that has potential
to cause so much grief, it is being practically ignored by standard
monitoring tools.
Gilad
Shachar
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