Größe des Cache im RAM beschränken

[Mawil]

Hallo,

es ist ja so, daß Linux den gesamten Hauptspeicher nutzt (den freien zum Cachen von Dateien). Der Hauptspeicher ist also fast immer zu 100% gefüllt.
Gibt es einen Parameter, mit dem man die Größe des Cache beschränken kann, so daß bei Bedarf nicht erst Hauptspeicher freigemacht werden muß?

[mistersixt]

Es müsste sein:

Code: Alles auswählen

/proc/sys/vm/swappiness

"Since 2.6, there has been a way to tune how much Linux favors swapping out to disk compared to shrinking the caches when memory gets full.

Swappiness takes a value between 0 and 100 to change a rough heuristic about when to swap out processes and when to release pages from cache. At 100, the kernel will always prefer to find inactive pages and swap them out; in other cases, whether a swapout occurs depends on how much application memory is in use and how poorly the cache is doing at finding and releasing inactive items.

The default swappiness is 60. A value of 0 gives something close to the old behavior where applications that wanted memory could shrink the cache to a tiny fraction of RAM. For laptops which would prefer to let their disk spin down, a value of 20 or less is recommended."

Gruss, mistersixt.