CPU consumption for unbound process is high

Issue

• CPU consumption for unbound process is high and spent in %usr, as shown by pidstat command below

  # pidstat -t -p $(pidof unbound) 10
  04:14:46 PM   UID      TGID       TID    %usr %system  %guest    %CPU   CPU  Command
  04:14:56 PM   998      1966         -  100.00    0.00    0.00  100.00     0  unbound
  04:14:56 PM   998         -      1966   53.50    0.00    0.00   53.50     0  |__unbound
  04:14:56 PM   998         -      1968   56.30    0.00    0.00   56.30     1  |__unbound
  04:14:56 PM   998         -      1969   52.40    0.00    0.00   52.40     3  |__unbound
  04:14:56 PM   998         -      1970   52.00    0.00    0.00   52.00     2  |__unbound
  

• CPU consumption for unbound process is high and spent in %usr when using tail -f on the unbound log file