为什么备库总是比主库多一个日志文件

Question

本帖最后由 zoulong0101 于 2013-04-09 11:47:53 编辑

Answer 1

通过相关sql查询说明
v$archived_log 视图

Answer 2

通过select max(sequence#) from v$archived_log;语句查时主备库两边的数量是一样的，比如说都是6，但是去看备库归档文件的时候会发现其实他比主库多了一个编号为7的dbf归档文件下面是主库的初始化文件
orcl.__db_cache_size=188743680
orcl.__java_pool_size=4194304
orcl.__large_pool_size=4194304
orcl.__shared_pool_size=83886080
orcl.__streams_pool_size=0
*.audit_file_dest='/oracle/admin/orcl/adump'
*.background_dump_dest='/oracle/admin/orcl/bdump'
*.compatible='10.2.0.1.0'
*.control_files='/oracle/oradata/orcl/control01.ctl','/oracle/oradata/orcl/control02.ctl','/oracle/oradata/orcl/control03.ctl'
*.core_dump_dest='/oracle/admin/orcl/cdump'
*.db_block_size=8192
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='orcl'
*.db_recovery_file_dest='/oracle/flash_recovery_area/'
*.db_recovery_file_dest_size=2147483648
*.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)'
*.job_queue_processes=10
*.log_archive_dest_1='location=/oracle/archivelog'
*.open_cursors=300
*.pga_aggregate_target=94371840
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=283115520
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/oracle/admin/orcl/udump'
*.db_unique_name='orcl'
*.log_archive_config='dg_config=(orcl,orcldg)'
*.log_archive_dest_2='service=orcldg lgwr async valid_for=(online_logfiles,primary_role) db_unique_name=orcldg'
*.log_archive_dest_state_1='enable'
*.log_archive_dest_state_2='enable'
*.fal_server=orcldg
*.fal_client=orcl
*.standby_file_management=auto
*.standby_archive_dest='location=/oracle/archivelog'这是备库的初始化文件
orcl.__db_cache_size=188743680
orcl.__java_pool_size=4194304
orcl.__large_pool_size=4194304
orcl.__shared_pool_size=83886080
orcl.__streams_pool_size=0
*.audit_file_dest='/oracle/admin/orcl/adump'
*.background_dump_dest='/oracle/admin/orcl/bdump'
*.compatible='10.2.0.1.0'
*.control_files='/oracle/oradata/orcl/control01.ctl','/oracle/oradata/orcl/control02.ctl','/oracle/oradata/orcl/control03.ctl'
*.core_dump_dest='/oracle/admin/orclump'
*.db_block_size=8192
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='orcl'
*.db_recovery_file_dest='/oracle/flash_recovery_area/'
*.db_recovery_file_dest_size=2147483648
*.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)'
*.job_queue_processes=10
*.log_archive_dest_1='location=/oracle/archivelog'
*.open_cursors=300
*.pga_aggregate_target=94371840
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=283115520
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/oracle/admin/orcl/udump'
*.db_unique_name='orcldg'
*.log_archive_config='dg_config=(orcl,orcldg)'
*.log_archive_dest_2='service=orcl lgwr async valid_for=(online_logfiles,primary_role) db_unique_name=orcl'
*.log_archive_dest_state_1='enable'
*.log_archive_dest_state_2='enable'
*.fal_server=orcl
*.fal_client=orcldg
*.standby_file_management=auto
*.standby_archive_dest='location=/oracle/archivelog'