Table of Contents
PFSense - Memory - High Memory Usage
Check State Tables
Navigate to System → Advanced → Firewall & NAT.
Check the Firewall Maximum States and Firewall Maximum Table Entries fields.
Each State table entry requires about 1 KB of RAM.
- The default state table size is calculated based on 10% of the available RAM in the firewall.
- For example, a firewall with 1 GB of RAM will default to 100,000 states which when full would use about 100 MB of RAM.
- For large environments requiring state tables with several hundred thousand connections, or millions of connections, ensure adequate RAM is available.
Check System Activity
Navigate to Diagnostics → System Activity.
NOTE: This is equivalent of the top -aSH command.
Check Packages
Some packages increase RAM requirements significantly.
- Snort and ntop are two that should not be installed on a system with less than 1GB RAM.