Troubleshooting Oracle Streams / CDC

Note: Always where possible use the CDC API’s (dbms_cdc_publish) and not the streams API’s to stop/start/trouble shoot Oracle CDC (Change Data Capture)

Stop & Start CDC from stage database:
sqlplus  cdc_stg_pub/cdc_stg_pub

begin
dbms_cdc_publish.alter_change_set(
change_set_name => ‘WFWH_PRD_TO_PRD_SET1′,
enable_capture => ‘Y’) ;
end;

begin
dbms_cdc_publish.alter_hotlog_change_source(
change_source_name => ‘WFWH_PRD_TO_PRD_SRC1’,
enable_source => ‘Y’) ;
end;
Switch archive logs on source database to start propagation.

Check Apply:
Run this from source and stage:
select * from dba_apply_error;
Increase Apply Parallelism:
DBMS_APPLY_ADM.Set_parameter(‘applyName’,’parallelism’,’4’);
Check source for archive log needed to restart CDC / Streams:
set serveroutput on
DECLARE lScn number := 0;
alog varchar2(1000);
begin select min(required_checkpoint_scn)into lScn from dba_capture ; DBMS_OUTPUT.ENABLE(2000);
dbms_output.put_line(’Capture will restart from SCN ‘ || lScn ||’ in the following file:’);
for cr in (select name, first_time from DBA_REGISTERED_ARCHIVED_LOG where lScn between first_scn and next_scn order by thread#) loop dbms_output.put_line(cr.name||’ (’||cr.first_time||’)');
end loop;
end;
Stop / Start propagation (source):
exec DBMS_PROPAGATION_ADM.stop_propagation(’CDC$P_WFWH_PRD_UAT_SET1′);
exec DBMS_PROPAGATION_ADM.start_propagation(’CDC$P_WFWH_PRD_TO_PRD_SET1′);

Stop / Start Capture:
EXEC DBMS_CAPTURE_ADM.STOP_CAPTURE(capture_name => ‘CDC$C_WFWH_PRD_TO_PRD_SRC1′);
EXEC DBMS_CAPTURE_ADM.START_CAPTURE(capture_name => ‘CDC$C_WFWH_PRD_TO_PRD_SRC1′);

How to Enable Capture tracing on SOURCE site:
1. Stop the capture
2. alter system set events ‘26700 trace name context forever, level 6′;
exec dbms_capture_adm.set_parameter(’yourcapturename’,'trace_level’,'127′);
Start capture
— set trace off after 30 minutes:
3. To turn off capture tracing:
exec dbms_capture_adm.set_parameter(’yourcapturename’,'trace_level’,null);
alter system set events ‘26700 trace name context off’;
Restart capture

How to Enable Propagation tracing on SOURCE site:
1. Stop/Disable Propagation
2. alter system set job_queue_processes=0;
alter system set events ‘ 24040 trace name context forever,level 10′;
alter system set job_queue_processes=10;
3. Start propagation
4. To disable the Propagation tracing
alter system set events ‘ 24040 trace name context off’;
Restart propagation

Run a healthcheck on both source and target:

Metalink: Note.273674.1 Streams Configuration Report and Health Check Script

Leave a Reply

You must be logged in to post a comment.


Viagra Buy Xanax On Line Buy Xanax Acyclovir Buy Alprazolam Buy Tenuate Buy Flexeril Buy Celexa Buy Zyrtec Buy Lortab Buy Valium Buy Zyban Cheap Phentermine Nexium Buy Adipex Buy Effexor Buy Bupropion Norco Buy Percocet Buy Norco Buy Norvasc Buy Cialis Online Buy Nexium Buy Adipex Valium Buy Bupropion Prozac Cheap Phentermine Buy Ambien Buy Ultram Bupropion Norvasc Vicodin Buy Adderall Cialis Norco Buy Valium Online Zyban Buy Vicodin Online Buy Cialis Online Zyprexa Buy Alprazolam Adipex Buy Xanax On Line Alprazolam Xanax Online Buy Butalbital Buy Hydrocodone Online Buy Bontril Buy Cheap Phentermine Valium Online Buy Biaxin Cipro Buy Cheap Phentermine Buy Xanax Online Buy Ephedrine Buy Cialis Online Tenuate Cipro Buy Hydrocodone Buy Codeine Buy Celexa Ultram Buy Hydrocodone Online Acyclovir Seroquel Acyclovir Buy Lipitor Propecia Buy Ambien Buy Cheap Phentermine Tramadol Online Buy Ativan Buy Cipro Buy Tramadol Online Buy Cialis Meridia Ativan Buy Seroquel Cialis Buy Vicodin Online