DBA Arena

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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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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