Monitor redo switchs

REM NAME         :log_hist.sql
REM PURPOSE      :Provide info on logs for last 24 hours since last
REM PURPOSE      :log switch
REM USE          :From SQLPLUS
REM Limitations  : None
REM MRA 10/14/01 Updated for Oracle9i
REM

COLUMN thread#             FORMAT 999      HEADING 'Thrd#'
COLUMN sequence#           FORMAT 99999    HEADING 'Seq#'
COLUMN first_change#                       HEADING 'SCN Low#'
COLUMN next_change#                        HEADING 'SCN High#'
COLUMN archive_name        FORMAT a50      HEADING 'Log File'
COLUMN first_time          FORMAT a20      HEADING 'Switch Time'
COLUMN name                FORMAT a30      HEADING 'Archive Log'

SET LINES 132 FEEDBACK OFF VERIFY OFF
START title132 "Log History Report"
SPOOL rep_out&dblog_hist
REM
SELECT
     X.recid,a.thread#,
     a.sequence#,a.first_change#,
     a.switch_change#,
     TO_CHAR(a.first_time,'DD-MON-YYYY HH24:MI:SS') first_time,x.name
FROM
 v$loghist a, v$archived_log x
WHERE
  a.first_time>
   (SELECT b.first_time-1
   FROM v$loghist b WHERE b.switch_change# =
    (SELECT MAX(c.switch_change#) FROM v$loghist c)) AND
     x.recid(+)=a.sequence#;
SPOOL OFF
SET LINES 80 VERIFY ON FEEDBACK ON
CLEAR COLUMNS
TTITLE OFF
PAUSE Press Enter to continue

 

 

Pour les switch de logs Oracle c'est ici

Messages dans l'alert.log :

Alert Log Messages: Private Strand Flush Not Complete

Si le paramètre archive_lag_target est valorisée à  0, cela désactive le time-based thread advance feature (merci pour la traduction en french).

 

Quelques pistes :

https://asktom.oracle.com/pls/asktom/f?p=100:11:::NO:RP:P11_QUESTION_ID:9529265900346002171

doc officielle :

https://docs.oracle.com/cd/B19306_01/server.102/b14237/initparams009.htm#REFRN10003

Optimiser requete sql pour postgres

Installer au préalable le module : pg_stats_statements

Exécuter la requête suivante :

SELECT * FROM pg_stat_statements ORDER BY total_time DESC;

Déplacer index dans le bon tablespace Oracle

SELECT 'ALTER INDEX ' || OWNER || '.' || segment_name || ' REBUILD TABLESPACE ' || 'TBS_INDEX' || ';'
FROM dba_segments  
WHERE OWNER <> 'EXPLOIT'
AND segment_type = 'INDEX'
AND tablespace_name like '%DATA'
UNION
SELECT 'ALTER TABLE ' || OWNER || '.' || segment_name || ' MOVE TABLESPACE ' || 'TBS_DATA' || ';'
FROM dba_segments  
WHERE OWNER <> 'EXPLOIT'
AND segment_type = 'TABLE'
AND tablespace_name like '%INDEX';