public void getValue(StringBuilder strBuff) {
        activeStatsBaseCall();
        getStatsValue(true, msgStoreStatsSets[getIndex()], strBuff);
    }
Get current writing statistics information.

@param strBuff  the return information in json format
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/broker/stats/MsgStoreStatsHolder.java