http://www.oracle-ckpt.com/dataguard_troubleshoot_snapper/
######sample
primay scripts:
spool dg_Primary_output.log
set feedback off
set trimspool on
set line 500
set pagesize 50
column name for a30
column display_value for a60
column ID format 99
column "SRLs" format 99
column active format 99
col type format a4
column ID format 99
column "SRLs" format 99
column active format 99
col type format a4
col PROTECTION_MODE for a20
col RECOVERY_MODE for a20
col db_mode for a15
SELECT name, display_value FROM v$parameter WHERE name IN ('db_name','db_unique_name','log_archive_config','log_archive_dest_2','log_archive_dest_state_2','log_archive_dest_3','log_archive_dest_state_3','fal_client','fal_server','standby_file_management','standby_archive_dest','db_file_name_convert','log_file_name_convert','remote_login_passwordfile','local_listener','dg_broker_start','dg_broker_config_file1','dg_broker_config_file2','log_archive_max_processes','db_recovery_file_dest') order by name;
col name for a10
col DATABASE_ROLE for a10
SELECT name,db_unique_name,protection_mode,DATABASE_ROLE,OPEN_MODE,switchover_status from v$database;
select thread#,max(sequence#) from v$archived_log group by thread#;
col severity for a15
col message for a70
col timestamp for a20
select severity,error_code,to_char(timestamp,'DD-MON-YYYY HH24:MI:SS') "timestamp" , message from v$dataguard_status where dest_id in (2,3,4);
select ds.dest_id id
, ad.status
, ds.database_mode db_mode
, ad.archiver type
, ds.recovery_mode
, ds.protection_mode
, ds.standby_logfile_count "SRLs"
, ds.standby_logfile_active active
, ds.archived_seq#
from v$archive_dest_status ds
, v$archive_dest ad
where ds.dest_id = ad.dest_id
and ad.status != 'INACTIVE'
order by
ds.dest_id;
column FILE_TYPE format a20
col name format a60
select name
, floor(space_limit / 1024 / 1024) "Size MB"
, ceil(space_used / 1024 / 1024) "Used MB"
from v$recovery_file_dest
order by name;
SELECT substr(name, 1, 30) name, space_limit/(1073741824) AS Quota_GB, space_used/(1073741824) AS Used_GB, space_reclaimable/(1073741824) AS Reclaimable_GB, number_of_files AS files FROM V$RECOVERY_FILE_DEST ;
select * from V$FLASH_RECOVERY_AREA_USAGE;
column deleted format a7
column reclaimable format a11
column FIRST_TIME format a15
column LAST_TIME format a15
set linesize 500
select applied,deleted,backup_count ,decode(rectype,11,'YES','NO') reclaimable,count(*) ,to_char(min(completion_time),'dd-mon hh24:mi') first_time ,to_char(max(completion_time),'dd-mon hh24:mi') last_time ,min(sequence#) first_seq,max(sequence#) last_seq from v$archived_log left outer join sys.x$kccagf using(recid) where is_recovery_dest_file='YES' group by applied,deleted,backup_count,decode(rectype,11,'YES','NO') order by min(sequence#)
spool off
standby scripts:
spool dg_standby_output.log set feedback off set trimspool on set line 500 set pagesize 50 set linesize 200 column name for a30 column display_value for a30 col value for a10 col PROTECTION_MODE for a15 col DATABASE_Role for a15
SELECT name, display_value FROM v$parameter WHERE name IN ('db_name','db_unique_name','log_archive_config','log_archive_dest_2','log_archive_dest_state_2','log_archive_dest_3','log_archive_dest_state_3','fal_client','fal_server','standby_file_management','standby_archive_dest','db_file_name_convert','log_file_name_convert','remote_login_passwordfile','local_listener','dg_broker_start','dg_broker_config_file1','dg_broker_config_file2','log_archive_max_processes','db_recovery_file_dest') order by name;
col name for a10 col DATABASE_ROLE for a10
SELECT name,db_unique_name,protection_mode,DATABASE_ROLE,OPEN_MODE from v$database;
select thread#,max(sequence#) from v$archived_log where applied='YES' group by thread#;
select process, status,thread#,sequence# from v$managed_standby;
SELECT ARCH.THREAD# "Thread", ARCH.SEQUENCE# "Last Sequence Received", APPL.SEQUENCE# "Last Sequence Applied", (ARCH.SEQUENCE# - APPL.SEQUENCE#) "Difference" FROM (SELECT THREAD# ,SEQUENCE# FROM V$ARCHIVED_LOG WHERE (THREAD#,FIRST_TIME ) IN (SELECT THREAD#,MAX(FIRST_TIME) FROM V$ARCHIVED_LOG GROUP BY THREAD#)) ARCH, (SELECT THREAD# ,SEQUENCE# FROM V$LOG_HISTORY WHERE (THREAD#,FIRST_TIME ) IN (SELECT THREAD#,MAX(FIRST_TIME) FROM V$LOG_HISTORY GROUP BY THREAD#)) APPL WHERE ARCH.THREAD# = APPL.THREAD# ORDER BY 1;
col name for a30
select * from v$dataguard_stats; select * from v$archive_gap; col name format a60 select name,floor(space_limit / 1024 / 1024) "Size MB" ,ceil(space_used / 1024 / 1024) "Used MB" from v$recovery_file_dest order by name;
SELECT substr(name, 1, 30) name, space_limit/(1073741824) AS Quota_GB, space_used/(1073741824) AS Used_GB, space_reclaimable/(1073741824) AS Reclaimable_GB, number_of_files AS files FROM V$RECOVERY_FILE_DEST ;
select * from V$FLASH_RECOVERY_AREA_USAGE;
spool off
workaroud:
- Cancel Managed Recovery
select open_mode from v$database;
SQL> alter database recover managed standby database cancel;
- Shutdown the Standby Database
SQL> shutdown immediate
SQL> startup mount;
SQL> alter database recover managed standby database using current logfile disconnect;
alter database recover managed standby database disconnect;
##########sample 0
启用lgwr传输redolog，在主库查询应该有lgwr进程传输日志，而不是arch进程，
->11G 但是在async模式下，使用的是LNS进程传输redolog.也就是real-time apply. 或者是是arch传送。
->11g 在sync模式下使用的是lgwr传输redolog如下：
SQL> select process,status,thread#,sequence#,block#,blocks from v$managed_standby;
PROCESS STATUS THREAD# SEQUENCE# BLOCK# BLOCKS
--------- ------------ ---------- ---------- ---------- ----------
ARCH CLOSING 1 11110 22528 304
ARCH CLOSING 1 11111 59392 1713
ARCH CLOSING 1 11106 1 1583
ARCH CLOSING 1 11109 12288 578
LNS WRITING 1 11112 42441 4
###### sample
REM Script to Report the Redo Log Switch History
set linesize 200 pagesize 1000
column day format a3
column total format 9999
column h00 format 999
column h01 format 999
column h02 format 999
column h03 format 999
column h04 format 999
column h04 format 999
column h05 format 999
column h06 format 999
column h07 format 999
column h08 format 999
column h09 format 999
column h10 format 999
column h11 format 999
column h12 format 999
column h13 format 999
column h14 format 999
column h15 format 999
column h16 format 999
column h17 format 999
column h18 format 999
column h19 format 999
column h20 format 999
column h21 format 999
column h22 format 999
column h23 format 999
column h24 format 999
break on report
compute max of "total" on report
compute max of "h01" on report
compute max of "h02" on report
compute max of "h03" on report
compute max of "h04" on report
compute max of "h05" on report
compute max of "h06" on report
compute max of "h07" on report
compute max of "h08" on report
compute max of "h09" on report
compute max of "h10" on report
compute max of "h11" on report
compute max of "h12" on report
compute max of "h13" on report
compute max of "h14" on report
compute max of "h15" on report
compute max of "h16" on report
compute max of "h17" on report
compute max of "h18" on report
compute max of "h19" on report
compute max of "h20" on report
compute max of "h21" on report
compute max of "h22" on report
compute max of "h23" on report
compute sum of NUM on report
compute sum of GB on report
compute sum of MB on report
compute sum of KB on report
alter session set nls_date_format='DD MON YYYY';
select thread#, trunc(first_time) as "date", to_char(first_time,'Dy') as "Day", count(1) as "total",
sum(decode(to_char(first_time,'HH24'),'00',1,0)) as "h00",
sum(decode(to_char(first_time,'HH24'),'01',1,0)) as "h01",
sum(decode(to_char(first_time,'HH24'),'02',1,0)) as "h02",
sum(decode(to_char(first_time,'HH24'),'03',1,0)) as "h03",
sum(decode(to_char(first_time,'HH24'),'04',1,0)) as "h04",
sum(decode(to_char(first_time,'HH24'),'05',1,0)) as "h05",
sum(decode(to_char(first_time,'HH24'),'06',1,0)) as "h06",
sum(decode(to_char(first_time,'HH24'),'07',1,0)) as "h07",
sum(decode(to_char(first_time,'HH24'),'08',1,0)) as "h08",
sum(decode(to_char(first_time,'HH24'),'09',1,0)) as "h09",
sum(decode(to_char(first_time,'HH24'),'10',1,0)) as "h10",
sum(decode(to_char(first_time,'HH24'),'11',1,0)) as "h11",
sum(decode(to_char(first_time,'HH24'),'12',1,0)) as "h12",
sum(decode(to_char(first_time,'HH24'),'13',1,0)) as "h13",
sum(decode(to_char(first_time,'HH24'),'14',1,0)) as "h14",
sum(decode(to_char(first_time,'HH24'),'15',1,0)) as "h15",
sum(decode(to_char(first_time,'HH24'),'16',1,0)) as "h16",
sum(decode(to_char(first_time,'HH24'),'17',1,0)) as "h17",
sum(decode(to_char(first_time,'HH24'),'18',1,0)) as "h18",
sum(decode(to_char(first_time,'HH24'),'19',1,0)) as "h19",
sum(decode(to_char(first_time,'HH24'),'20',1,0)) as "h20",
sum(decode(to_char(first_time,'HH24'),'21',1,0)) as "h21",
sum(decode(to_char(first_time,'HH24'),'22',1,0)) as "h22",
sum(decode(to_char(first_time,'HH24'),'23',1,0)) as "h23"
from
v$archived_log
where first_time > trunc(sysdate-10)
group by thread#, trunc(first_time), to_char(first_time, 'Dy') order by 2,1;
REM Script to calculate the archive log size generated per day for each Instances
select THREAD#, trunc(first_time) as "DATE"
, count(1) num
, trunc(sum(blocks*block_size)/1024/1024/1024) as GB
, trunc(sum(blocks*block_size)/1024/1024) as MB
, sum(blocks*block_size)/1024 as KB
from v$archived_log
where first_time > trunc(sysdate-1)
group by thread#, trunc(first_time)
order by 2,1
;
########
###sample
FRA 区 无法自动删除归档 。
今天检查发现,状态正常了，应该跟log_archive_dest_state_2 之前一直是开启的状态，但是指向的sdt1备库已不存在，把这个log_archive_dest_state_2参数关闭后，恢复正常了。同时删除修改参数之前的归档日志即可。
CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY;
SQL> SELECT substr(name, 1, 30) name, space_limit/(1073741824) AS Quota_GB, space_used/(1073741824) AS Used_GB, space_reclaimable/(1073741824) AS Reclaimable_GB, number_of_files AS files FROM V$RECOVERY_FILE_DEST ;
NAME QUOTA_GB USED_GB RECLAIMABLE_GB FILES
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ---------- ---------- -------------- ----------
/fra 36 .265626907 .248462677 80
SYMPTOMS
*** Reviewed for Relevance 15-Jul-2015 ***
May encounter different types of errors depending on the situations:
- Logs are not shipped at log switch or fal archiving fails
- Value of applied column on the primary is not consistent as that on the standby
- RMAN does not delete logs and results in error RMAN-08137
- In some rare cases ORA-12154 may show up in the primary alert log
- Other possible errors ORA-3113, ORA-3135
- WARN: ARCH: Terminating pid <PID> hung on an I/O operation
krsv_proc_kill: Killing 1 processes (Process by index)
CHANGES
Problem usually occurs after OS or network errors, or restarting the primary or standby instance or reboot the primary or standby node that abruptly crashes log shipping between the primary and standby
CAUSE
ARCx processes on the primary stuck on the network forever or that are responsible to update the APPLIED column get stuck and can not recover themselves.
Additionally these processes that may be used for local and remote archiving, heartbeat and FAL fetching logs on the primary.
So when they are all stuck and reach the maximum number of values specified in log_archive_max_processes, they can cause ambiguous errors as shown above.
The worst case would be all ARCx processes on the primary are stuck and they couldn't do local archiving, so that all online redo log files are full which causes the primary database hangs.
This may be due to standby db crash, network errors or some abrupt outage on the standby or primary.
The other common cause is the firewall.
SOLUTION
ARCx processes on the primary need to be restarted.
Assuming that log transport from the primary is configured by log_archive_dest_2.
Please perform the following:
1) If the Data Guard Broker is running, disable Data Guard Broker on both primary and standby:
2) On the Primary Database:
SQL> alter system set log_archive_dest_state_2='defer';
SQL> alter system switch logfile;
- Reset log_archive_dest_2
SQL> show parameter log_archive_dest_2
SQL> alter system set log_archive_dest_2 = '';
- Switch logfiles on the Primary
SQL> alter system switch logfile;
3) On the Standby Database:
SQL> alter database recover managed standby database cancel;
- Shutdown the Standby Database
SQL> shutdown immediate
4) On the Primary: kill the ARCx Processes and the Database will respawn them automatically immediately without harming it.
kill -9 <ospid of ARC process> <another ospid of ARC process> ...
5) On standby server, startup Standby Database and resume Managed Recovery
SQL> alter database recover managed standby database [using current logfile] disconnect;
6) Re-enable Log Transport Services on the Primary:
At this point all the ARCx processes should be up and running on the Primary.
7) Re-enable the Data Guard Broker for both, Primary and Standby if applicable:
8) Please work with your Network Administrator to make sure the following Firewall Features are disabled.
- SQLNet fixup protocol
- Deep Packet Inspection (DPI)
- SQLNet packet inspection
- SQL Fixup
- SQL ALG (Juniper firewall)
NOTE : To enable SQLNET tracing refer,
tep by Step Method to Enable SQLNET(Server Tracing) Dynamically on Dataguard (Doc ID 2010476.1)
The wording and features can vary by vendor but all the above have some impact on some packets (not all packets are affected).
Some firewalls can have an adverse effect on certain SQL packets transported across them (again, some not all).
#####11G ADG 监控
http://blog.itpub.net/29376842/viewspace-1222115/
监控 real-time apply 实时同步的dataguard 是否正常同步：
select to_char(SYSDATE,'yyyymmdd hh24:mi:ss') CTIME,NAME,VALUE,DATUM_TIME
from V$DATAGUARD_STATS
WHERE NAME LIKE '%lag';
其中如果apply lag对应的value大于0，那么就需要注意检查是否同步正常。如果相差
时间非常多，value值等于几分钟，甚至达到1个小时，那可能实时同步有问题，需要
检查 alert log 文件，其中会提示是否启动了real time apply, 检查最近的log，可以
发现：
alter database recover managed standby database using current logfile disconnect from session
MRP0 started with pid=20, OS id=647263927
Managed Standby Recovery starting Real Time Apply
查询备库是否有MRP0进程：
select * from v$managed_standby where process = 'MRP0';
说明实时同步已经开启，那么如果apply lag 还是常常大于0，那么可能是DG上standby redo log
的问题，如果standby redo log增加不正确，那么可以在alert log中找到类似如下的语句：
RFS[1]: No Standby redo logfiles created for thread 1
那么可能是standby redo log没有在DG上创建，也有可能创建了，但是thread错误导致。 可以通过
select GROUP#, THREAD#, SEQUENCE#, STATUS from v$standby_log 查看, 如果创建了standby
redo log , 那么在应用redo时，一定有至少1个standby redo log的状态是 ACTIVE 的，其他大多数
是 unassigned . 如果都是 UNASSIGNED ，那么就是standby redo log的问题。
可以通过如下方式重新加入：
shut immediate
startup mount
alter database add standby logfile thread 1 group 4 '/opt/oracle/oradata/test/standby_redo04.log ' size 1024M;
alter database add standby logfile thread 1 group 5 '/opt/oracle/oradata/test/standby_redo05.log ' size 1024M;
....
最后再开启为read only with apply的方式：
startup nomount
alter database mount standby database ;
alter database open read only ;
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ ONLY
SQL> alter database recover managed standby database using current logfile disconnect from session;
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ ONLY WITH APPLY
还有一种影响同步的是，apply 同步出现错误 ， 可以查询 select error from v$archive_dest 查看是否有同步错误 。
如果需要暂停或取消同步apply :
alter database recover managed standby database cancel ;