Best Way to monitor standby, primary databases, including alert logs, etc.

Question

Hi, Guys, I finally cutover the new environment to the new linux redhat and everything working great so far (the primary/standby).
Now I would like to setup monitoring scripts to monitor it automatically so I can let it run by itself.
What is the best way?
I talked to another dba friend outside of the company and he told me his shop not use any cron jobs to monitor, they use grid control.
We have no grid control. I would like to see what is the best option here? should we setup grid control?
And also for the meantime, I would appreciate any good ideas of any cronjob scripts.
Thanks

Answer 1

Hello;
I came up with this which I run on the Primary daily, Since its SQL you can add any extras you need.
SPOOL OFF
CLEAR SCREEN
SPOOL /tmp/quickaudit.lst
PROMPT
PROMPT -----------------------------------------------------------------------|
PROMPT
SET TERMOUT ON
SET VERIFY OFF
SET FEEDBACK ON
PROMPT
PROMPT Checking database name and archive mode
PROMPT
column NAME format A9
column LOG_MODE format A12
SELECT NAME,CREATED, LOG_MODE FROM V$DATABASE;
PROMPT
PROMPT -----------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT Checking Tablespace name and status
PROMPT
column TABLESPACE_NAME format a30
column STATUS format a10
set pagesize 400
SELECT TABLESPACE_NAME, STATUS FROM DBA_TABLESPACES;
PROMPT
PROMPT ------------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT Checking free space in tablespaces
PROMPT
column tablespace_name format a30
SELECT tablespace_name ,sum(bytes)/1024/1024 "MB Free" FROM dba_free_space WHERE
tablespace_name <>'TEMP' GROUP BY tablespace_name;
PROMPT
PROMPT ------------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT Checking freespace by tablespace
PROMPT
column dummy noprint
column  pct_used format 999.9       heading "%|Used"
column  name    format a16      heading "Tablespace Name"
column  bytes   format 9,999,999,999,999    heading "Total Bytes"
column  used    format 99,999,999,999   heading "Used"
column  free    format 999,999,999,999  heading "Free"
break   on report
compute sum of bytes on report
compute sum of free on report
compute sum of used on report
set linesize 132
set termout off
select a.tablespace_name                                              name,
       b.tablespace_name                                              dummy,
       sum(b.bytes)/count( distinct a.file_id||'.'||a.block_id )      bytes,
       sum(b.bytes)/count( distinct a.file_id||'.'||a.block_id ) -
       sum(a.bytes)/count( distinct b.file_id )              used,
       sum(a.bytes)/count( distinct b.file_id )                       free,
       100 * ( (sum(b.bytes)/count( distinct a.file_id||'.'||a.block_id )) -
               (sum(a.bytes)/count( distinct b.file_id ) )) /
       (sum(b.bytes)/count( distinct a.file_id||'.'||a.block_id )) pct_used
from sys.dba_free_space a, sys.dba_data_files b
where a.tablespace_name = b.tablespace_name
group by a.tablespace_name, b.tablespace_name;
PROMPT
PROMPT ------------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT Checking Size and usage in GB of Flash Recovery Area
PROMPT
SELECT
  ROUND((A.SPACE_LIMIT / 1024 / 1024 / 1024), 2) AS FLASH_IN_GB,
  ROUND((A.SPACE_USED / 1024 / 1024 / 1024), 2) AS FLASH_USED_IN_GB,
  ROUND((A.SPACE_RECLAIMABLE / 1024 / 1024 / 1024), 2) AS FLASH_RECLAIMABLE_GB,
  SUM(B.PERCENT_SPACE_USED)  AS PERCENT_OF_SPACE_USED
FROM
  V$RECOVERY_FILE_DEST A,
  V$FLASH_RECOVERY_AREA_USAGE B
GROUP BY
  SPACE_LIMIT,
  SPACE_USED ,
  SPACE_RECLAIMABLE ;
PROMPT
PROMPT ------------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT Checking free space In Flash Recovery Area
PROMPT
column FILE_TYPE format a20
select * from v$flash_recovery_area_usage;
PROMPT
PROMPT ------------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT ------------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT Checking last sequence in v$archived_log
PROMPT
clear screen
set linesize 100
column STANDBY format a20
column applied format a10
--select max(sequence#), applied from v$archived_log where applied = 'YES' group by applied;
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;
PROMPT
PROMPT ------------------------------------------------------------------------|
PROMPT
PROMPT
PROMPT Checking switchover status
PROMPT
select switchover_status from v$database;I run it from a shell script and email myself quickaudit.lst
Alert logs are great source of information when you have an issue or just want to check something.
Best Regards
mseberg