NIST 800-53 REV 5 • SYSTEM AND COMMUNICATIONS PROTECTION
SC-6 — Resource Availability
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CMMC Practice Mapping
No direct CMMC mapping
NIST 800-171 Mapping
No direct NIST 800-171 mapping
Related Controls
Supplemental Guidance
Priority protection prevents lower-priority processes from delaying or interfering with the system that services higher-priority processes. Quotas prevent users or processes from obtaining more than predetermined amounts of resources.
Practitioner Notes
Resource availability means making sure critical system resources — CPU, memory, bandwidth, storage — are allocated so that one runaway process or user cannot starve others.
Example 1: Use Windows Resource Manager or Linux cgroups to set CPU and memory limits per application. Your critical database server gets a guaranteed minimum allocation so a misbehaving batch job cannot consume all available resources.
Example 2: On your virtualization platform (VMware, Hyper-V), configure resource reservations and limits for each VM. Give your domain controllers and security tools guaranteed CPU and memory reservations so they keep running even when application VMs spike to 100 percent utilization.