private void initializeStats() {
    getRequestRate = new StatsRate(StatsKey.GET_REQUESTS, StatType.INT_TYPE, monitor);

    putRequestRate = new StatsRate(StatsKey.PUT_REQUESTS, StatType.INT_TYPE, monitor);

    getRequestAvgLatency = new StatsAverageLatency(StatsKey.GET_REQUESTS, StatType.INT_TYPE,
        StatsKey.PROCESS_GET_TIME, monitor);

    putRequestAvgLatency = new StatsAverageLatency(StatsKey.PUT_REQUESTS, StatType.INT_TYPE,
        StatsKey.PROCESS_PUT_TIME, monitor);

  }
While starting the cache server stats can be monitored.
geode-core/src/main/java/org/apache/geode/management/internal/beans/ServerBridge.java