High RAM Usage?!

[K4m1K4tz3]

I have a proplem when Nexuiz is loading a second map. With the first map I have no problems but after the second, its damn laggy. I have good frames (about 50) but after 2 or 3 seconds there is a lag for an half second. And thats with nearly every map. I looked for RAM and Swap usage and here is a picture of it:



I have an Athlon 64 3200+
1024 MB DDR RAM
Geforce FX 5900 XT
Suse 10.0 with Linux Kernel 2.6.13-15.12-default
its the 64 Bit Version

Is this normal?