Restart downstream capture server,dequeue operation did not work

Question

Hi, every one. I created real time downstream capture on SUSE Linux 10 with Oracle 10R2, it worked. But after I restarted downstream DB, the replication didn't work while capture, apply,propagation process was all in normal status . In V$Buffered_queue I saw not dequeued messages spilled to disk. Later I configured real time downstream capture on Windows XP platform, and got the same situation. I searched on this forum and found a thread about this. I changed the AQ_TM_PROCESSES　from 0 to 1 on Windows XP Platform, the replication started to work. But when I changed this parameter on SUSE Linux Platform, the replication still didn't work and messages were spilled to disk in V$Buffered_queue. I don't know why. I did all of this in vmware workstation. I'm not a DBA and don't have a metalink account. Any help about this is appreciated.
thanks.
JunWang

Answer 1

Spilled to disk? are they on the aq$_<queue_name>p table or in the queue table? Anything into dbaapply_error?
Can you give the following output :
set lines 190
-- reader
col DEQUEUED_MESSAGE_NUMBER for 999999999999
SELECT ap.APPLY_NAME, DECODE(ap.APPLY_CAPTURED,'YES','Captured LCRS', 'NO','User-Enqueued','UNKNOWN') APPLY_CAPTURED,
       SUBSTR(s.PROGRAM,INSTR(S.PROGRAM,'(')+1,4) PROCESS_NAME, r.STATE, r.TOTAL_MESSAGES_DEQUEUED, r.sga_used
       FROM V$STREAMS_APPLY_READER r, V$SESSION s, DBA_APPLY ap
       WHERE r.SID = s.SID AND
             r.SERIAL# = s.SERIAL# AND
             r.APPLY_NAME = ap.APPLY_NAME;
SELECT APPLY_NAME, sid rsid , (DEQUEUE_TIME-DEQUEUED_MESSAGE_CREATE_TIME)*86400 LATENCY,
        TO_CHAR(DEQUEUED_MESSAGE_CREATE_TIME,'HH24:MI:SS MM/DD') CREATION, TO_CHAR(DEQUEUE_TIME,'HH24:MI:SS MM/DD') deqt,
        DEQUEUED_MESSAGE_NUMBER  FROM V$STREAMS_APPLY_READER;
-- coordinator : compare to reader to see if there is an effective apply problem
col totr format 999999999 head "Total|Received"
col tad format 9999999 head "Total|Admin"
col appn format A22 head "Apply name"
col terr format 9999999 head "Total|Errors"
col twd format 9999999 head "Total|Wait"
col TOTAL_ROLLBACKS format 9999999 head "Total|Rollback"
col twc format 9999999 head "Total|Wait|Commits"
select apply_name appn, apply#,sid,state, total_received totr, total_applied tap, total_wait_deps twd, TOTAL_ROLLBACKS,
      total_wait_commits twc, total_errors terr, to_char(hwm_time,'DD-MM HH24:MI:SS')hwt
from v$streams_apply_coordinator order by apply_name
-- any errors?
SELECT queue_name,source_commit_scn scn, message_count, source_database,LOCAL_TRANSACTION_ID, ERROR_MESSAGE FROM DBA_APPLY_ERROR order by message_count desc;