  The Resistive Plate Chambers detector system at the CMS experiment at the LHC
provides robustness and redundancy to the muon trigger. A total of 1056
double-gap chambers cover the pseudo-rapidity region < 1.6. The main detector
parameters and environmental conditions are constantly and closely monitored to
achieve operational stability and high quality data in the harsh conditions of
the second run period of the LHC with center-of-mass energy of 13 TeV. First
results of overall detector stability with 2015 data and comparisons with data
from the LHC RUN-1 period at 8 TeV are presented.
