Problem in MCMC

I use DPpackage in order to analyze data ( the amount of n is approximately 7000 ). during # MCMC parameters with
nburn <- 5000
nsave <- 10000
nskip <- 10
ndisplay <- 100with
suddenly R is stopped (for instance after reading MCMC scan 5500 of 10000 (CPU time: 8791.460 s) ) and I need to terminate R. Whenever I run again this scan became less. My first question, How to improve this running? secondly, I used R Studio Cloud and R studio Server Pro but I had the same problem. Please let me know.

Thanks