High RAM usage when executed for different hosts

[ronator]

This may not be considered an issue but I was wondering why my icinga2 was precipitously using a lot more RAM. Found out, when icinga calls check_elasticsearch it (very) shortly takes around 400MB of RAM for each host you check, so if you check 10 ES instances and if all check are executed the same time, it will use around 4GB of RAM for some seconds. I am not sure if I am willing to pay such a prize for this otherwise nice plugin.