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Distribution: RH 7.3/8.0/9.0, Debian Stable 3.0, FreeBSD 5.2, Solaris 8/9/10,HP-UX
Linux and Memory usage
I want to know a bit from you guys if my linux system behaves the same as yours, and possibly some possible logical reason for this.
The box has 612.48MB of RAM and I remember that the after a fresh reboot the amount of memory used is very minimal. After some uptime I can see that the amount of memory sued becomes to increment day by day. After an uptime of 3 days 12 hours 56 minutes, I have only 24.69MB of memory left, and for the first time I've had Debian, i'm realising that 4.18MB are being used from the Swap memory.. Does this mean that if i leave for some 5 weeks, my machine will be crawling like a snail due to lack of memory??
Something else related maybe to box specs, what are bogomips??
My only services running are an apache server which only me uses, so i don't think it consumes much memory, and the X-server.
This means 6.5M are unused, but 100M hold cached data, so the are eligible to be freed on demand.
If you want to access disk data that is in this cache, you'll have it in microseconds
Note that if an application is idle for a long time (e.g. a shell you're not using) it will be likely swapped to make your cache bigger.
Also note that (unlike winnt) linux will NEVER write to swap security-related information such as encripted fs info or passwords (unless you use badly-careless applications, of course).