Thinking Out Loud

June 11, 2017

GoldenGate 12.2 TROUBLESHOOTING REPLICAT LAG

Filed under: 12c,GoldenGate,oracle — mdinh @ 2:16 pm

Time Since Chkpt and Lag at Chkpt from replicat keep increasing

Program     Status      Group       Lag at Chkpt  Time Since Chkpt
REPLICAT    RUNNING     R_NEW12C    03:49:45      06:37:47    

This occurs for due to the following reasons:

Delivering a long running transaction
Waiting on a full table scan
Blocked by another sessions
Primary extract lag or pump lag keeps increasing

Is There a Way to Make Long-running Transactions Checkpoint? (Doc ID 969684.1)

The tradeoff with GROUPTRANSOPS is with efficiency. 
The tradeoff with MAXTRANSOPS is efficiency and transaction integrity. 

There are no long running transaction from the extract and is monitored using WARNLONGTRANS 15m, CHECKINTERVAL 3m.

grep "Long Running Transaction" dirrpt/E_OLD10G.rpt

My suspicion is FTS, but how to find out?

SQL> r
  1  select
  2  -- SQL_ID,PLAN_HASH_VALUE,
  3  OBJECT_OWNER,OBJECT_NAME, min(TIMESTAMP) min_ts, max(TIMESTAMP) max_ts, count(*) ct
  4  from DBA_HIST_SQL_PLAN
  5  where operation='TABLE ACCESS'
  6  and options='FULL'
  7  and NOT REGEXP_LIKE(object_owner,'SYS|SYSTEM|DBSNMP')
  8  and TIMESTAMP > TO_DATE('01-JUN-2017','DD-MON-YYYY')
  9  group by
 10  -- SQL_ID,PLAN_HASH_VALUE,
 11  OBJECT_OWNER,OBJECT_NAME
 12  order by count(*), OBJECT_OWNER,OBJECT_NAME
 13*
 
OBJECT_OWNER         OBJECT_NAME                    MIN_TS               MAX_TS                       CT
-------------------- ------------------------------ -------------------- -------------------- ----------
XXX                  THISISAREALLYLONGTABLENAME     01-JUN-2017 00:01:00 11-JUN-2017 02:55:36        114

SQL> select index_name from dba_indexes where table_name='THISISAREALLYLONGTABLENAME';
no rows selected
SQL> 
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