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

change_set_name => ‘WFWH_PRD_TO_PRD_SET1′,
enable_capture => ‘Y’) ;

change_source_name => ‘WFWH_PRD_TO_PRD_SRC1’,
enable_source => ‘Y’) ;
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:
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.first_time||’)');
end loop;
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:

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.

Ultracet Buy Viagra Buy Valium Buy Flexeril Buy Valium Online Phentermine Online Prozac Vicodin Buy Glucophage Viagra Oxycontin Buy Diflucan Buy Soma Online Xanax Buy Percocet Paxil Buy Diazepam Vicodin Adipex Lortab Meridia Buy Ativan Adderall Buy Zyrtec Buy Ambien Buy Lipitor Cipro Buy Cialis Adderall Buy Lipitor Ativan Buy Fioricet Ephedrine Adderall Buy Zithromax Buy Zyrtec Alprazolam Acyclovir Buy Celexa Buy Effexor Percocet Lipitor Paxil Buy Bupropion Buy Alprazolam Cheap Phentermine Buy Adipex Tramadol Buy Zyban Buy Codeine Valium Phentermine Buy Ativan Buy Viagra Buy Adderall Buy Hydrocodone Online Buy Hydrocodone Online Propecia Buy Oxycontin Buy Vicodin Phentermine Online Buy Norvasc Meridia Phentermine Carisoprodol Propecia Buy Ambien Buy Paxil Carisoprodol Viagra Codeine Xanax Buy Norco Buy Tramadol Buy Diflucan Clonazepam Cheap Phentermine Buy Xanax Buy Cialis Buy Lexapro Zyban