> after a few months I am using Debian at home I keep > wandering whether it uses too much RAM.
Dont forget that memory is used for caching and suchlike.. Why is is so bad to have 90% memory used after all is it better for it to be unused? you paid for it! ;) So it is used to speed things up, cache things you might need and re-used when you request something in particular.. Unless everything slows to a crawl, swaps like mad or runs out of memory you should take it with a pinch of salt (and maybe wonder why the other 10% isn't made to do something useful too)
