docs: @Override
      public void statisticCreated(SPIStatistic s) {
          if (s.getId() == ACTIVE_THREADS) {
              activeThreads = (SPIBoundedRangeStatistic) s;
          } else if (s.getId() == POOL_SIZE) {
              poolSize = (SPIBoundedRangeStatistic) s;
          } else {
              if (tc.isDebugEnabled()) {
                  Tr.debug(tc, "Invlid stats found " + s);
              }
          }
      }