Split 1. OGG REPLICAT process

If the particle size Replicat splitting process and is not detailed enough, the best method for selective tuning process is Replicat split.
Such as a single Replicat unable to meet a delivery queue data requirements, it can be split according to the table, and each process a different set of tables, try to ensure that the same table involved in a business Replicat can ensure consistency between (to be temporarily banned list foreign key links can split ensure Replicat)

1.1. Stop the process to split

GGSCI (cndba) 11> stop rep1

Sending STOP request to REPLICAT REP1 ...
Request processed.

1.2. To view the split process and RBA number of SEQNO

GGSCI (cndba) 12> info rep1

REPLICAT   REP1      Last Started 2018-06-11 21:18   Status STOPPED
Checkpoint Lag       00:00:00 (updated 00:00:58 ago)
Log Read Checkpoint  File ./dirdat/et000024
                     2018-06-11 21:58:22.004321  RBA 1324
说明当前的进程读到第24个队列，而且RBA号1314的位置。

1.3. To create a new process for the editing parameter files, here called rep2

edit params rep2
REPLICAT rep2
--setenv (ORACLE_SID=cndba)
--SETENV (ORACLE_HOME = "/u01/app/oracle/product/11.2.0/db_1")
USERID ogg,PASSWORD ogg
ASSUMETARGETDEFS
--HANDLECOLLISIONS
REPERROR (DEFAULT, DISCARD)
DDLERROR DEFAULT DISCARD
DDLOPTIONS REPORT
DISCARDFILE ./dirrpt/repr2.dsc,append,megabytes 100
--HANDLECOLLISIONS
MAP test.test2, TARGET test.test2;

1.4. Adding rep2 process group, and add tail file

GGSCI (cndba) 17> add replicat rep2, exttrail ./dirdat/et, checkpointtable ogg.checkpoint
REPLICAT added.

1.5. Rep2 same modified pointers and rep1

GGSCI (cndba) 18> alter rep2,extseqno 24 extrba 1324
REPLICAT altered.

1.6. Rep2 and reconfirmed rep1 pointer changes to the length consistent state

GGSCI (cndba) 22> info rep1

REPLICAT   REP1      Last Started 2018-06-11 21:18   Status STOPPED
Checkpoint Lag       00:00:00 (updated 00:14:17 ago)
Log Read Checkpoint  File ./dirdat/et000024
                     2018-06-11 21:58:22.004321  RBA 1324

GGSCI (cndba) 30> info rep2

REPLICAT   REP2      Initialized   2018-06-12 00:22   Status STOPPED
Checkpoint Lag       00:00:00 (updated 00:00:04 ago)
Log Read Checkpoint  File ./dirdat/et000024
                     First Record  RBA 1324

1.7. Always remember to take rep1 in Split rep2 tables exclude, or there will be duplicate data

edit params rep1
tableexclude test.test2

1.8. Start rep1 and rep2

GGSCI (cndba) 32> start rep1

Sending START request to MANAGER ...
REPLICAT REP1 starting

GGSCI (cndba) 33> start rep2

Sending START request to MANAGER ...
REPLICAT REP2 starting


GGSCI (cndba) 34> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           
REPLICAT    RUNNING     REP1        00:00:00      00:00:08    
REPLICAT    RUNNING     REP2        00:00:00      00:00:04

1.9. Test

--源端插入数据
SQL>  insert into test2 values(1,'zhangsan');

1 row created.

SQL> commit;

Commit complete.

SQL> insert into test values(50,'test');

1 row created.

SQL> commit;

Commit complete.

SQL> select count(*) from test;

  COUNT(*)
----------
 40
--目标端查看数据
SQL> select * from test2;

 ID NAME
---------- --------
  1 zhangsan

SQL> select count(*) from test;

  COUNT(*)
----------
 40
到这个ogg 就把比较慢的进程拆分到不同的两个进程里面，入库就会明显地加快。
对ogg 调优其实就是对一些参数做相应的调整。入库比较慢就要对Replicat进程进行拆分，而且很多时候对ogg 的瓶颈就是Replicat进程，大多数时候调优发送在容灾端。

Split OGG REPLICAT process