2009/2/7 Adrian Joian <adrian.joian@xxxxxxxxxxxxxxxx>: > Hello, > > Well, if you really want to decrease cache levels you could at schedule > at random times the following command: > echo 1 > /proc/sys/vm/drop_caches > > Adrian JOIAN > fedoraproject.ro > > Chris Tyler wrote: >> On Fri, 2009-02-06 at 23:57 +0100, Joshua C. wrote: >> >>> I have kde 4.2 and f9. After 2+ hours on my computer it has about >>> 1,4GB cached memory. I don't see him releasing this memory after time. >>> I know it comes from the apps being open but it seems the kernel >>> "never" releases the memory after the app terminates. How to make the >>> kernel free this memory? I've seen similar cases with kde 3.5.10 and >>> f8 and f7. I know kde eats memory but this is too much. Who caches so >>> much of it? Why? >>> >>> The mashine has 2,6 GB RAM (still x86) and 512mb swap which is rarely >>> used (~ 50mb at most) and combined cached + app memory totals about 2 >>> gb. >>> >> >> Hi Joshua, >> >> Memory is being used for cache basically because it's not being used for >> anything else. The kernel will gladly use that memory for other purposes >> when it's needed -- but until then, there's no harm in keeping disk data >> around in otherwise-unused memory just in case it's needed later. >> >> This is why the "free" command shows a "-/+ buffers/cache" line, which >> shows you what the memory picture is without the cache (i.e., the memory >> that is truly available when needed): >> >> $ free >> total used free shared buffers cached >> Mem: 4061388 3796632 264756 0 259244 570224 >> -/+ buffers/cache: 2967164 1094224 >> Swap: 4194296 2092276 2102020 >> >> >> -Chris >> >> > > -- > fedora-devel-list mailing list > fedora-devel-list@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/fedora-devel-list > Than you everyone for the replies. Swapping do occurs (although rarely) but this is not my concern. What I don't like is the fact, that the kernel fills the memory with "what he thinks I would use/like or have already used". I didn't know it will use the cached memory in case it's needed. But then is the question: When swapping occurs where have the other 2,6 gb ram gone? I don't believe I've opened so many apps that can consume so much memory. -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
