Slowly all my memory gets used up by fedora (2 GB)

[Mark]

Hey,

i`ve had this problem for a while (since FC5 if `im right) and slowly all my
memory gets used up.
i did the top command but that doesn`t show anything unusual besides that
all my memory is used.
i`m using Gnome.

this is the top of top:

top - 23:00:23 up  3:37,  3 users,  load average: 0.17, 0.11, 0.08
Tasks: 118 total,   1 running, 116 sleeping,   1 stopped,   0 zombie
Cpu(s): 50.0%us, 50.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,
0.0%st
Mem:   2038076k total,  1939184k used,    98892k free,   430052k buffers
Swap:  2031608k total,        0k used,  2031608k free,   941860k cached

The swap file isn`t being used.. but still the memory is filled up. in this
case i still have 98MB left but i`ve seen less.
is this a bug?
or is this the memory management of linux?


Thanx
Mark.
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