How To Check Whether Physical Standby is in Sync with the Primary

Question

hi All,
I'm new in data guard. In our current production, my boss is asking me to write a shell scripts monitoring physical standby and primary archive is sync (archive gap)
I'm referring metalink [ID 861595.1], but when i ran the first query in Primary node, the screen hang.
On primary
========
SQL> SELECT THREAD# "Thread",SEQUENCE# "Last Sequence Generated"
FROM V$ARCHIVED_LOG
WHERE (THREAD#,FIRST_TIME ) IN (SELECT THREAD#,MAX(FIRST_TIME) FROM V$ARCHIVED_LOG GROUP BY THREAD#)
ORDER BY 1;
I tried to turn on 10046 SQL trace, the SQL consume a lot of CPU, and it full table scan in X$KCCAL table.
TKPROF result look like below:
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        1     88.29     115.59          0          0          0           0
total        3     88.30     115.60          0          0          0           0
Misses in library cache during parse: 1
Misses in library cache during execute: 1 Optimizer mode: ALL_ROWS Parsing user id: 80 
Rows     Row Source Operation
      0  SORT ORDER BY (cr=0 pr=0 pw=0 time=21 us)
      0   FILTER  (cr=0 pr=0 pw=0 time=19 us)
   1124    FIXED TABLE FULL X$KCCAL (cr=0 pr=0 pw=0 time=40537 us)
      0    FILTER  (cr=0 pr=0 pw=0 time=115538625 us)
   1122     HASH GROUP BY (cr=0 pr=0 pw=0 time=115530193 us)
7465972      FIXED TABLE FULL X$KCCAL (cr=0 pr=0 pw=0 time=94648975 us)
Elapsed times include waiting on following events:
  Event waited on                        Times   Max. Wait  Total Waited
  -----------------------------------   Waited  ----------  ------------
  SQL*Net message to client               1        0.00          0.00
  control file sequential read        16841        0.05         30.88
  SQL*Net break/reset to client           1        0.00          0.00Due to this is production environment, thus i had terminated the session, can anyone teach me or share with me any scripts to monitor physical standby is sync with primary or not? Or do you encounter the above issue when running the SQL?
My db version is Oracle 11.2.0.1.0
Thanks in advance.
Regards,
Klnghau

Answer 1

Hello;
Note 861595.1 has not been subject to an independent technical review. Not sure if that make it bad or not.
This is what I'm using: ( I spool this to a file and have it e-mailed to me daily)
PROMPT
PROMPT Checking last sequence in v$archived_log
PROMPT
clear screen
set linesize 100
column STANDBY format a20
column applied format a10
SELECT name as STANDBY, SEQUENCE#, applied, completion_time from v$archived_log WHERE DEST_ID = 2 AND NEXT_TIME > SYSDATE -1;
prompt
prompt----------------Last log on Primary--------------------------------------|
prompt
select max(sequence#) from v$archived_log where NEXT_TIME > sysdate -1;
Best Regards
mseberg