请问一下各位有关 dataguard的maximize protection资料同步问题

请问一下各位有关 dataguard的maximize protection资料同步问题
现在发现如commit完后，立即 shutdown abort，发现 standby db会有少资料，有办法可解决吗?

db : 10.2.0.4
os : redhat 4.8

测试结果如下:
-- standby db 如停止运作，primary db 会卡在 commit
-- 于 primary db 上 insert 一笔资料，commit，再马上 shutdown abort，发现 standby db 会有少资料
-- 于 primary db 上 insert 一笔资料，commit，等一些时间，大约1分钟内，在standby db 上查寻，发现资料已有同步过来了

(于 standby db : sora10g 操作如下)
SQL> alter database recover managed standby database cancel;
SQL> ALTER DATABASE OPEN READ ONLY;
SQL> select * from x01;
SQL> alter database recover managed standby database using current logfile disconnect from session;



SQL> SELECT PROTECTION_MODE, PROTECTION_LEVEL FROM V$DATABASE;
PROTECTION_MODE      PROTECTION_LEVEL
-------------------- --------------------
MAXIMUM PROTECTION   MAXIMUM PROTECTION



primary db : sora10g
*.db_name='ora10g'
*.db_unique_name='sora10g'
*.fal_client='sora10g'
*.fal_server='ora10g'
*.log_archive_config='DG_CONFIG=(sora10g,ora10g)'
*.log_archive_dest_1='LOCATION=/app/oradata/ora10g/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=sora10g'
*.log_archive_dest_2='SERVICE=ora10g LGWR SYNC AFFIRM NET_TIMEOUT=5 VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=ora10g'

standby db : ora10g
*.db_name='ora10g'
*.fal_client='ora10g'
*.fal_server='sora10g'
*.job_queue_processes=10
*.log_archive_config='DG_CONFIG=(ora10g,sora10g)'
*.log_archive_dest_1='LOCATION=/app/oradata/ora10g/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=ora10g'
*.log_archive_dest_2='SERVICE=sora10g LGWR SYNC AFFIRM NET_TIMEOUT=5 VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=sora10g'

有点儿延时 应该算是正常的我觉得

但文件是说没有资料损失，如这时 primary db是整台挂了，那standby db就会少资料了