达梦数据库并发场景下，抓取执行久/等待久的慢SQL

-- ss单位是秒
select
                *
        from
                (
                        select
                                (
                                        SELECT
                                                round(SUM(TOTAL_SIZE/1024/1024), 2)
                                        FROM
                                                V$MEM_POOL C
                                        where
                                                C.name    = 'VIRTUAL MACHINE'
                                            AND C.CREATOR = A.THRD_ID
                                        GROUP BY
                                                CREATOR
                                )AS VM_TOTAL_SIZE_BY_M,
                                a.trx_id              ,
                                a.thrd_id             ,
                                clnt_ip               ,
                                c.ROLLBACK_FLAG       ,
                                'sp_close_session('
                                ||a.sess_id
                                ||');'                                  ,
                                curr_sch                                ,
                                B.IO_WAIT_TIME/1000 as IO_WAIT_TIME     ,
                                TO_CHAR(sf_get_session_sql(a.sess_id))  ,
                                datediff(ss, last_recv_time, sysdate) ss,
                                B.LOGIC_READ_CNT                        ,
                                B.RECYCLE_LOGIC_READ_CNT                ,
                                sql_text                                ,
                                c.ins_cnt                               ,
                                c.upd_cnt                               ,
                                c.del_cnt                               ,
                                a.CONNECTED                             ,
                                a.state                                 ,
                                a.appname                               ,
                                a.clnt_ver                              ,
                                a.clnt_host
                        from
                                V$sessions A,
                                V$SQL_STAT B,
                                v$trx c
                        where
                                state    in('ACTIVE', 'WAIT')
                            AND A.SESS_ID = B.SESSID
                            and a.trx_id  =c.id
                            AND A.SESS_ID = C.SESS_ID
                )
        order by
                ss desc