Add document about memory consumption

2016-08-18 00:04:08 +03:00 · 2016-08-18 00:04:08 +03:00 · 162cda0348
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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:
+```bash
+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.
+