Help me please

[akx]

I'm running a 30 slot server on my server and when i restat and put the server back online the cpu stays at 40% for about 3-4 houres beeing full the whole time and then all of a sudden it starts going up to like 98 99 %.Does anyone know what would be the problem?
server specs:
Intel® Pentium® 4 CPU 3.20GHz
1GB of ram
Running fedora core 2
And to mention that i get lag spikes alot

this is what i use to run it
screen -A -m -d -S css-server1 ./srcds_run -game cstrike +ip 72.36.216.242 +map de_dust +maxplayers 30 +servercfgfile server1.cfg +mapcyclefile mapcycle.txt -port 27015 -tickrate 66 -secure

[spyeagle]

try adding +fps_max 500 to your startup line...If that doesn't work try increasing your maxrate: sv_maxrate 25000 or 30000 even if you have the bandwidth available. These suggestions may also help with your lag spikes. Give it a try and let me know.