有时候如果数据差异太大，可能需要重新同步整个数据库，可以参考下列流程

源端：
run {
backup as compressed backupset database include current controlfile format '/ywdata/full_rman/fulllisbackup_%U';
}
查询一个scn号：
select current_scn from v$database;
select dbms_flashback.get_system_change_number from dual;
887839592
将备份集拷贝到目标端


目标端：
停止应用程序
shutdown immediate;
start nomount;
restore controlfile from '/ywarch/full_rman/fulllisbackup_senffv7v_1_1'
alter database mount;
catalog backuppiece  '/ywarch/full_rman/fulllisbackup_sdnffs25_1_1'
restore database;
拷贝归档日志
recover database until scn 887839592;
alter database open resetlogs;

创建临时表空间
create temporary tablespace test tempfile '/ywdata/lis/test01.dbf' size 200m;
alter database default temporary tablespace test;
drop tablespace temp including contents and datafiles;
create temporary tablespace temp tempfile '/ywdata/lis/temp01.dbf' size 2g reuse;
alter database default temporary tablespace temp;
drop tablespace test including contents and datafiles;
select file_name from dba_temp_files;


目标端goldengate：
dblogin userid goldengate password goldengate
delete replicat replis
edit params ./GLOBALS
添加参数，一般就是CHECKPOINTTABLE goldengate.ggchkpt
exit
dblogin userid goldengate password goldengate
add checkpointtable
add replicat replis,EXTTRAIL ./dirdat/rt CHECKPOINTTABLE goldengate.ggchkpt
edit params replis
参数根据需要做修改
alter replicat replis extseqno 89, extrba 0
start replis aftercsn 887839592