[20230303]學習UNIFIED audit--定期清理AUDSYS.AUD$UNIFIED.txt

[20230303]學習UNIFIED audit--定期清理AUDSYS.AUD$UNIFIED.txt

--//前面的學習包括手工操作整理AUDSYS.AUD$UNIFIED以及移動AUDSYS.AUD$UNIFIED到別的表空間.
--//下面學習定期清理AUDSYS.AUD$UNIFIED

--//參考:
--//
--//https://www.cnblogs.com/cqdba/p/13258891.html
--// Create the scheduler job which purge the AUDSYS.AUD$UNIFIED table daily

1.環境:
SYS@192.168.100.141:1521/dyhis> @ver1
SYS@192.168.100.141:1521/dyhis> @ pr
==============================
PORT_STRING                   : x86_64/Linux 2.4.xx
VERSION                       : 19.0.0.0.0
BANNER                        : Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
BANNER_FULL                   : Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.9.0.0.0
BANNER_LEGACY                 : Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
CON_ID                        : 0
PL/SQL procedure successfully completed.

2.步驟:
--//定時排程設定時間戳.執行DBMS_AUDIT_MGMT.SET_LAST_ARCHIVE_TIMESTAMP。
--//取月尾日期.
SYS@192.168.100.141:1521/dyhis> select add_months(trunc(sysdate,'mm'),1),add_months(trunc(sysdate,'mm'),-2) from dual ;
ADD_MONTHS(TRUNC(SY ADD_MONTHS(TRUNC(SY
------------------- -------------------
2023-04-01 00:00:00 2023-01-01 00:00:00

--//仔細看了連結https://www.cnblogs.com/cqdba/p/13258891.html,感覺有點繁瑣。
--//使用了DBMS_AUDIT_MGMT.CREATE_PURGE_JOB.
--//根據我前面測試，操作最好直接刪除整個分割槽，這樣更加快捷。
--//索性我設定時間戳後馬上執行清理操作，修改如下：

BEGIN
   DBMS_SCHEDULER.create_job
   (
      job_name          => 'JOB_PURGE_AUDIT_RECORDS'
     ,job_type          => 'PLSQL_BLOCK'
     ,job_action        => q'[BEGIN
DBMS_AUDIT_MGMT.SET_LAST_ARCHIVE_TIMESTAMP(DBMS_AUDIT_MGMT.AUDIT_TRAIL_UNIFIED,add_months(trunc(sysdate,'mm'),-2));
DBMS_AUDIT_MGMT.CLEAN_AUDIT_TRAIL(AUDIT_TRAIL_TYPE=>DBMS_AUDIT_MGMT.AUDIT_TRAIL_UNIFIED,USE_LAST_ARCH_TIMESTAMP=>TRUE);
END;]'
     ,--  start_date => add_months(trunc(sysdate,'mm'),1),
      start_date        => SYSDATE
     ,--    repeat_interval => 'freq=monthly; byhour=7; byminute=50; bysecond=0;',
      repeat_interval   => 'freq=monthly;bydate=0101,0201,0301,0401,0501,0601,0701,0801,0901,1001,1101,1201;byhour=8; byminute=50; bysecond=0;'
     ,end_date          => NULL
     ,enabled           => TRUE
     ,comments          => 'Update last_archive_timestamp and clean unified audit trail'
   );
END;
/
--//根據需要設定保留的時間段,我設定保留最少2個月. 如果保留3個月就是-3.

SYS@192.168.100.141:1521/dyhis> select * from  DBA_AUDIT_MGMT_LAST_ARCH_TS;
AUDIT_TRAIL          RAC_INSTANCE LAST_ARCHIVE_TS                   DATABASE_ID CONTAINER_GUID
-------------------- ------------ --------------------------------- ----------- ---------------------------------
UNIFIED AUDIT TRAIL             0 2023-01-01 00:00:00.000000 +00:00  4090373436 B60D258AC2D9EF54E0532A63A8C09F1F

SYS@192.168.100.141:1521/dyhis> select start_date,LAST_START_DATE,LAST_RUN_DURATION,NEXT_RUN_DATE from dba_scheduler_jobs where job_name= 'JOB_PURGE_AUDIT_RECORDS'
     @pr
==============================
START_DATE                    : 2023-03-03 09:07:24.000000 +08:00
LAST_START_DATE               :
LAST_RUN_DURATION             :
NEXT_RUN_DATE                 : 2023-04-01 08:50:00.000000 +08:00
PL/SQL procedure successfully completed.
--//不知道是否時區會有影響.前面的+0時區,後面的+08時區.

SYS@192.168.100.141:1521/dyhis> select max(event_timestamp) from AUDSYS.AUD$UNIFIED;
MAX(EVENT_TIMESTAMP)
---------------------------------------------------------------------------
2023-03-03 01:12:40.778111

SYS@192.168.100.141:1521/dyhis> select max(event_timestamp) from AUDSYS.AUD$UNIFIED;
MAX(EVENT_TIMESTAMP)
---------------------------------------------------------------------------
2023-03-03 01:12:46.815100

SYS@192.168.100.141:1521/dyhis> select SYSDATE from dual ;
SYSDATE
-------------------
2023-03-03 09:13:10
--//很明顯EVENT_TIMESTAMP改用+0時區.

SYS@192.168.100.141:1521/dyhis> select * from DBA_AUDIT_MGMT_CLEANUP_JOBS;
no rows selected
--//沒有采用DBMS_AUDIT_MGMT.CREATE_PURGE_JOB方式.

--//相關檢視：內容來自https://www.cnblogs.com/cqdba/p/13258891.html
--//DBA_AUDIT_MGMT_CLEAN_EVENTS      顯示傳統(即非統一)審計跟蹤的清除事件的歷史記錄
--//統計審計的清除記錄 select * from UNIFIED_AUDIT_TRAIL  
--//where OBJECT_NAME='DBMS_AUDIT_MGMT' and OBJECT_SCHEMA='SYS' AND SQL_TEXT LIKE '%DBMS_AUDIT_MGMT.CLEAN_AUDIT_TRAIL%';
--//DBA_AUDIT_MGMT_CLEANUP_JOBS      顯示當前配置的稽核跟蹤清除作業
--//DBA_AUDIT_MGMT_CONFIG_PARAMS     顯示DBMS_AUDIT_MGMTPL / SQL程式包 使用的當前配置的稽核跟蹤屬性
--//DBA_AUDIT_MGMT_LAST_ARCH_TS      顯示為審計跟蹤清除設定的最後一個歸檔時間戳記