从MON_GET_TABLE中取出的rows_inserted始终是不变的

SELECT sum(rows_read) as  total_rows_selected,sum(rows_inserted) as total_rows_inserted, sum(rows_updated) as total_rows_updated, sum(rows_deleted) as total_rows_deleted FROM TABLE(MON_GET_TABLE('','',-2))

通过上面这个SQL查出的4个值一直是不变的，但是数据库确实已经发生了变化，请专家帮忙解释下收起