1.1.2 (08.07.2019)

Enhancements

(1061) Introduced HdrHistogram-based metrics reservoir

Introduced HdrHistogram–based implementation of reservoir in metrics. HdrHistogram-based
reservoir has much less memory footprint than exponentially decaying (previous implementation). Because of this GC in
Hermes has less job to do which leads to better Hermes performance. In the near future it will be default Hermes metrics reservoir.

To switch between implementations, use metrics.reservoir.type option:

• exponentially_decaying - exponentially decaying reservoir (default)
• hdr - HdrHistogram–based reservoir