Histograms stored in samples take too much memory during long runs

 On the screenshot above we see memory utilization of 2 nodes which are used for running latte. Memory utilization grew up to 10Gb for 3 hours of uptime on each of the nodes. Debugged a bit locally and observed that memory leaks happen during each event of sampling. My observation is that memory utilization is directly related to the made operations during a sampling period.