Define TTL of measurement per user type

[alexey-yarmosh]

We store test results for 7 days but have nowhere near the HW to actually do that with the real usage because the redis instance only has 100 MB of memory. Of course, we'll move to a higher plan, but even then, it's questionable - how many results can we roughly fit into a 16/32/64 GB memory server, and is that enough for a full week?

Required answers:

• what is the average size of a single measurement result with 1 probe?
• what is the average size of a single measurement result with 500 probes?
• assuming that a single measurement has 100 probes, how many measurements can we fit into 100MB/1GB/10GB memory server?
• assuming we have 1 measurement request per second with 100 probes, how long we are able to store the data in a 1GB/10GB/32GB/64GB memory server?