When Data pump is running slowly or when it is hanging, determining which query is currently running will help in understanding the problem. The following script will show the SQL statement executed with the current wait event every 10 minutes.
First, create a script named dp_current_sql.sql that contains the following code.
dp_current_sql.sql
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spool current_sql.out oradebug setospid &spid select to_char (sysdate, 'YYYY-MM-DD HH24:MI:SS') from dual; oradebug current_sql break by 1; select w.event, w.wait_time,w.seconds_in_wait, w.p1,w.p2,w.p3 from v$session s, v$process p, v$session_wait w where s.paddr=p.addr and s.module='Data Pump Worker' and s.sid=w.sid; exec DBMS_LOCK.SLEEP(600); select to_char (sysdate, 'YYYY-MM-DD HH24:MI:SS') from dual; oradebug current_sql break by 1; select w.event, w.wait_time,w.seconds_in_wait, w.p1,w.p2,w.p3 from v$session s, v$process p, v$session_wait w where s.paddr=p.addr and s.module='Data Pump Worker' and s.sid=w.sid; exec DBMS_LOCK.SLEEP(600); select to_char (sysdate,'YYYY-MM-DD HH24:MI:SS') from dual; oradebug current_sql break by 1; select w.event, w.wait_time,w.seconds_in_wait, w.p1,w.p2,w.p3 from v$session s, v$process p, v$session_wait w where s.paddr=p.addr and s.module='Data Pump Worker' and s.sid=w.sid; spool off; |
Connect with sqlplus as SYSDBA. Determine the SPID of the Data Pump Worker (DW00) process with the following query.
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set lines 150 pages 100 numwidth 7 col program for a38 col username for a10 col spid for a7 select to_char (sysdate,'YYYY-MM-DD HH24:MI:SS') "DATE", s.program, s.sid, s.status, s.username, d.job_name, p.spid, s.serial#, p.pid from v$session s, v$process p, dba_datapump_sessions d where p.addr=s.paddr and s.saddr=d.saddr; |
Run the dp_current_sql.sql script you created above from sqlplus. When asked for the spid value, enter the SPID value detected in the above step.
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SQL> @dp_current_sql.sql Enter value for spid: |
When you run the script, it will produce output similar to the following. You can also find the output in the current_sql.out file in the current directory.
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SQL> @dp_current_sql.sql Enter value for spid: 70112 Oracle pid: 129, Unix process pid: 70112, image: oracle@oradb.oracle.local (DW00) TO_CHAR(SYSDATE,'YY ------------------- 2018-10-13 17:29:42 insert /*+ OPT_PARAM('_parallel_syspls_obey_force' 'false') */ into sys.dbms_stats_id_map_tab (c5, c1, c2, cn) select /*+ leading(s) index(s) */ distinct s.c5, s.c1, s.c2, i.partition_name cn from "SYS"."IMPDP_STATS" s, dba_ind_partitions i where s.c5 = :1 and s.c1 = :2 and s.type in ('I','i') and s.n13 is not null and s.c2 like 'SYS_%' and s.c3 is null and s.c5 = i.index_owner and s.c1 = i.index_name and s.n13 = i.partition_position and s.c2 != i.partition_name and s.statid is null EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- db file sequential read -1 2 1 151735 1 wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 16 rows selected. PL/SQL procedure successfully completed. TO_CHAR(SYSDATE,'YY ------------------- 2018-10-13 17:39:43 merge /*+ OPT_PARAM('_parallel_syspls_obey_force' 'false') */ into optstat_user_prefs$ d using (select o.obj#, s.c2 pname, s.n1 valnum, s.cl1 valchar, s.d1 chgtime, s.n2 spare1 from "SYS"."IMPDP_STATS" s, obj$ o, user$ u where s.c5= :ownname and s.c1= :tabname and s.type = 'P' and SYS_OP_MAP_NONNULL(s.statid) = SYS_OP_MAP_NONNULL(:stid) and o.owner#=u.user# and u.name= :ownname and o.type# = 2 and o.name= :tabname ) s on (d.obj#=s.obj# and d.pname=s.pname) when matched then update set valchar=s.valchar when NOT matched then insert (obj#, pname, valnum, valchar, chgtime, spare1) values(s.obj#, s.pname, s.valnum, s.valchar, s.chgtime, s.spare1) EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- db file sequential read -1 5 1 163263 1 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 16 rows selected. PL/SQL procedure successfully completed. TO_CHAR(SYSDATE,'YY ------------------- 2018-10-13 17:49:43 insert /*+ OPT_PARAM('_parallel_syspls_obey_force' 'false') */ into sys.dbms_stats_id_map_tab (c5, c1, c2, cn) select /*+ leading(s) index(s) */ distinct s.c5, s.c1, s.c2, d.partition_name cn from "SYS"."IMPDP_STATS" s, (select u.name table_owner, op.name table_name, op.subname partition_name, tp.part# partition_position from user$ u, obj$ op, (select obj#, part# from tabpartv$ where bo# = :1 union all select obj#, part# from tabcompartv$ where bo# = :2 ) tp where u.user# = op.owner# and op.type# = 19 and op.obj# = tp.obj# ) d where s.c5 = :3 and s.c1 = :4 and s.type in ('T','C','E', EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- db file sequential read -1 497 1 137287 1 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 2 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 4 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 3 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 wait for unread message on broadcast channel 0 5 9981956688 1.0534E+10 0 EVENT WAIT_TIME ---------------------------------------------------------------- ---------- SECONDS_IN_WAIT P1 P2 P3 --------------- ---------- ---------- ---------- wait for unread message on broadcast channel 0 1 9981956688 1.0534E+10 0 16 rows selected. SQL> |
