090816 Raul Gonzales wrote:
> I have a 2G of physical RAM but even without any major activity
> output of free,vmstat and top reports only  ~64M free. 
>
> free -m
>             total       used       free     shared    buffers     cached
> Mem:          1953       1888         65          0        143       1557
> -/+ buffers/cache:        187       1765
> Swap:         2055          0       2055

The crucial figure is '187', which is what is usable.
You have a lot of something cached: any idea what it might be ?
-- the kernel should delete that stuff, if it needs the space.

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