We lost one of the requirements from https://confluence.percona.com/display/PMM/Prometheus+2 (line 2)
Provision Prometheus 1 with 15% of RAM
Todo: we need change our formula to use only 15% of available memory for prom1 instance to be used.
Note: this also need to be changed after an update
2) We also found that `--web.max-connections=N` option is also important.
TODO: Add -e MAX_CONNECTIONS option to set this parameter.
Default value, if not specified : 15
Note: MAX_CONNECTIONS and Memory limitations should be applied to prom1 ONLY
Info: The current value of the allowed web.max-connections is 512. This is too much for prom1 now