Sure you can, but I'd suggest obtaining a thorough understanding of what is actually happening before changing any of these:
sk97827: How to change ClusterXL Interface Monitoring Timeouts
Also note that in many cases more than one of these kernel values is used to calculate various ClusterXL timers, so be sure to understand those interrelationships before changing individual values.
"IPS Immersion Training" Self-paced Video Class
Now Available at http://www.maxpowerfirewalls.com
New 2-day Live "Max Power" Series Course Now Available:
"Gateway Performance Optimization R81.20" at maxpowerfirewalls.com