set linesize 1200
set pagesize 1200
column tablespace_name format a20 heading 'Tablespace'
column sumb format 999,999,999
column extents format 9999
column bytes format 999,999,999,999
column largest format 999,999,999,999
column Tot_Size format 999,999 Heading 'Total| Size(Mb)'
column Tot_Free format 999,999,999 heading 'Total Free(MB)'
column Pct_Free format 999.99 heading '% Free'
column Chunks_Free format 9999 heading 'No Of Ext.'
column Max_Free format 999,999,999 heading 'Max Free(Kb)'
set echo off
PROMPT FREE SPACE AVAILABLE IN TABLESPACES
select a.tablespace_name,sum(a.tots/1048576) Tot_Size,
sum(a.sumb/1048576) Tot_Free,
sum(a.sumb)*100/sum(a.tots) Pct_Free,
sum(a.largest/1024) Max_Free,sum(a.chunks) Chunks_Free
from
(
select tablespace_name,0 tots,sum(bytes) sumb,
max(bytes) largest,count(*) chunks
from dba_free_space a
group by tablespace_name
union
select tablespace_name,sum(bytes) tots,0,0,0 from
dba_data_files
group by tablespace_name) a
group by a.tablespace_name
order by pct_free;

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1. Check database and application availability
2. Check status of cluster services
3. Monitor space availability in all tablespaces
4. Check for errors in Database Alert log files and take appropriate action
5. Check Concurrent Managers
6. Check /tmp for space constraints
7. Check invalid objects and compile if required
8. ASM Grid Space Check
9. Database and Application Mount points check
10. Verify Backups
11. Verify Gather Schema Statistics and Purge Concurrent Request and/or Manager Data Concurrent Requests are scheduled and are completing successfully

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Finding the root cause of sudden increase in the archive log generation on the database.

Find tables that have maximum number of changes during the period there was huge archive generation.

SELECT to_char(begin_interval_time,'YYYY_MM_DD HH24:MI') snap_time,
dhsso.object_name,
SUM(db_block_changes_delta)
FROM dba_hist_seg_stat dhss,
dba_hist_seg_stat_obj dhsso,
dba_hist_snapshot dhs
WHERE dhs.snap_id = dhss.snap_id
AND dhs.instance_number = dhss.instance_number
AND dhss.obj# = dhsso.obj#
AND dhss.dataobj# = dhsso.dataobj#
AND begin_interval_time BETWEEN to_date('2015_05_23 12','YYYY_MM_DD HH24')
AND to_date('2015_05_25 12','YYYY_MM_DD HH24')
GROUP BY to_char(begin_interval_time,'YYYY_MM_DD HH24:MI'),
dhsso.object_name order by SUM(db_block_changes_delta) desc;

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If the processes do not match for Output Post Processor

CONCURRENT_QUEUE_NAME RUNNING_PROCESSES TARGET_PROCESSES MAX_PROCESSES MIN_PROCESSES
-------------------- ----------------- ---------------- ------------- -------------
FNDCPOPP 6 3 3 3

Check Internal Manager log

Starting FNDCPOPP Concurrent Manager : 14-APR-2015 17:26:18
Starting FNDCPOPP Concurrent Manager : 14-APR-2015 17:26:18
Starting FNDCPOPP Concurrent Manager : 14-APR-2015 17:26:18
Process monitor session started : 15-APR-2015 14:05:45
Internal Concurrent Manager found node APPROD to be down. Adding it to the list of unavailable nodes.
Internal Concurrent Manager found node DBPROD to be down. Adding it to the list of unavailable nodes.
CONC-SM TNS FAIL
Call to PingProcess failed for XDPCTRLS
CONC-SM TNS FAIL
Call to PingProcess failed for XDPQORDS

Call to PingProcess failed for FNDOPP
CONC-SM TNS FAIL
Call to PingProcess failed for FNDOPP
CONC-SM TNS FAIL
Call to PingProcess failed for FNDOPP

Starting FNDCPOPP Concurrent Manager : 15-APR-2015 14:08:11
Starting FNDCPOPP Concurrent Manager : 15-APR-2015 14:08:11
Starting FNDCPOPP Concurrent Manager : 15-APR-2015 14:08:12

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This script will report on all backups – full, incremental and archivelog backups.

col STATUS format a9
col hrs format 999.99
select session_key, input_type, status,to_char(start_time,'mm/dd/yy hh24:mi') start_time,to_char(end_time,'mm/dd/yy hh24:mi') end_time,elapsed_seconds/3600 hrs from V$rman_backup_job_details order by session_key;

SESSION_KEY  INPUT_TYPE    STATUS              START_TIME           END_TIME              HRS
--------------------------------------------------------------------------------------------------------------------------------
378                   DB FULL          RUNNING            02/25/15 08:10      02/25/15 10:15     2.08416
378                   DB FULL          COMPLETED       02/25/15 08:10      02/25/15 10:31     2.35944
386                   BACKUPSET    RUNNING           02/25/15 10:31      02/25/15 11:03     0.53305
386                   BACKUPSET    COMPLETED       02/25/15 10:31      02/25/15 11:20     0.81388
========================================================================================

Monitor RMAN Progress

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