We have tried everything no meta, slim meta and raw clean server. Seems NS after a bit just gets high pings on some machines. This server in on an OC3 running dual Xeon. Dod and CS server same machine are perfect. BUT... NS even in a map like nothing (not much spam either) spikes like crazy. Check out this post for more info...
http://www.amxmodx.org/forums/viewtopic.php?t=6737
Realy would love some help of any kind!