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fastnetmon-rewritten/docs/MEMORY_CONSUMPTION.md
Pavel Odintsov 162cda0348 Add document about memory consumption
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Memory consumption

Required amount of memory is depends on total number of monitored hosts.

You could use this formula for calculations:

total_number_of_hosts * 208 * 3
  • 3 is a number of counters (data counter, current speed counter, smoothed speed counter).
  • 208 is a total size of traffic countring structure for 1.1.3 version.

Example computations:

  • /16, 65535 hosts - 40 mb of RAM
  • /8, 16 millions of hosts - 10GB ram

But please keep in mind! We need to iterate across all counters with single CPU core in ~1 second. Then, for big number of hosts you need to have fast CPU core.