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.

Buy Adipex Buy Viagra Buy Codeine Buy Biaxin Paxil Buy Propecia Online Xanax Buy Zocor Buy Tramadol Buy Vicodin Online Butalbital Alprazolam Viagra Buy Online Xanax Buy Lortab Adderall Biaxin Buy Zovirax Buy Norvasc Buy Zyban Darvocet Buy Didrex Cheap Phentermine Buy Zyban Prozac Lorazepam Buy Ativan Generic Viagra Buy Norvasc Buy Hydrocodone Online Buy Ambien Zovirax Buy Prozac Buy Effexor Zovirax Zithromax Buy Phentermine Buy Effexor Buy Biaxin Buy Cialis Buy Lortab Ultram Acyclovir Bontril Ephedrine Viagra Meridia Diflucan Soma Buy Levitra Butalbital Online Xanax Buy Cipro Bontril Buy Ephedrine Buy Generic Viagra Buy Darvocet Ambien Zithromax Buy Darvocet Diazepam Paxil Buy Nexium Buy Oxycontin Buy Viagra Online Zyban Buy Seroquel Buy Didrex Buy Ambien Buy Diflucan Tramadol Buy Ephedrine Celexa Buy Xanax Buy Glucophage Buy Tenuate Buy Hydrocodone Online Buy Norco Alprazolam Diazepam Biaxin