一、環(huán)境
12c ADG環(huán)境

在延平等地區(qū)，都構(gòu)建了全面的區(qū)域性戰(zhàn)略布局，加強(qiáng)發(fā)展的系統(tǒng)性、市場(chǎng)前瞻性、產(chǎn)品創(chuàng)新能力，以專注、極致的服務(wù)理念，為客戶提供做網(wǎng)站、成都網(wǎng)站設(shè)計(jì) 網(wǎng)站設(shè)計(jì)制作按需設(shè)計(jì)網(wǎng)站,公司網(wǎng)站建設(shè),企業(yè)網(wǎng)站建設(shè),品牌網(wǎng)站建設(shè),全網(wǎng)營(yíng)銷推廣,外貿(mào)網(wǎng)站建設(shè),延平網(wǎng)站建設(shè)費(fèi)用合理。

二、現(xiàn)象描述

主庫(kù)日志切換卡?。╤ang）

SQL> alter system switch logfile;

三、處理過(guò)程
1、查看日志

$tail -f al*.log
Mon Jan 08 21:04:20 2018
ARC0: LGWR is scheduled to archive destination LOG_ARCHIVE_DEST_1 after log switch
Mon Jan 08 21:11:21 2018
ARC3: LGWR is scheduled to archive destination LOG_ARCHIVE_DEST_1 after log switch
Mon Jan 08 21:19:21 2018
ARC0: LGWR is scheduled to archive destination LOG_ARCHIVE_DEST_1 after log switch
Mon Jan 08 21:26:22 2018
ARC3: LGWR is scheduled to archive destination LOG_ARCHIVE_DEST_1 after log switch
Mon Jan 08 21:34:22 2018
ARC0: LGWR is scheduled to archive destination LOG_ARCHIVE_DEST_1 after log switch
Mon Jan 08 21:42:19 2018
ARC0: LGWR is scheduled to archive destination LOG_ARCHIVE_DEST_1 after log switch

2、考慮歸檔參數(shù)

SQL> show parameter log_archive_dest

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest                     string
log_archive_dest_1                   string      service="orcl", SYNC AFFIRM de
                                                 lay=0 optional compression=dis
                                                 able max_failure=0 max_connect
                                                 ions=1 reopen=300 db_unique_na
                                                 me="orcl" net_timeout=10, vali
                                                 d_for=(online_logfile,all_role
                                                 s)
log_archive_dest_10                  string
log_archive_dest_11                  string
log_archive_dest_12                  string

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_13                  string
log_archive_dest_14                  string
log_archive_dest_15                  string
log_archive_dest_16                  string
log_archive_dest_17                  string
log_archive_dest_18                  string
log_archive_dest_19                  string
log_archive_dest_2                   string      location="+DATADG/arch",  vali
                                                 d_for=(STANDBY_LOGFILE,STANDBY
                                                 _ROLE)

3、參數(shù)明顯有問(wèn)題,另開一個(gè)會(huì)話

SQL> ALTER SYSTEM SET log_archive_dest_2='location="+DATADG/arch",  valid_for=(ALL_LOGFILES,ALL_ROLES)';

System altered.

SQL> 

4、查看主庫(kù)日志

ALTER SYSTEM SET log_archive_dest_2='location="+DATADG/arch",  valid_for=(ALL_LOGFILES,ALL_ROLES)' SCOPE=BOTH;
Mon Jan 08 21:49:23 2018
Archived Log entry 376 added for thread 1 sequence 365 ID 0x58e622f8 dest 2:
krse_arc_driver_core: Successful archiving of previously failed ORL
Mon Jan 08 21:49:23 2018
******************************************************************
LGWR: Setting 'active' archival for destination LOG_ARCHIVE_DEST_1
******************************************************************
Mon Jan 08 21:49:24 2018
Destination LOG_ARCHIVE_DEST_1 no longer supports SYNCHRONIZATION
Mon Jan 08 21:49:24 2018
Thread 1 advanced to log sequence 368 (LGWR switch)
  Current log# 1 seq# 368 mem# 0: +DATADG/ORCLDG/ONLINELOG/group_1.399.962961189
  Current log# 1 seq# 368 mem# 1: +DATADG/ORCLDG/ONLINELOG/group_1.402.962961189
Mon Jan 08 21:49:24 2018
Archived Log entry 377 added for thread 1 sequence 366 ID 0x58e622f8 dest 2:
Mon Jan 08 21:49:24 2018
Archived Log entry 378 added for thread 1 sequence 367 ID 0x58e622f8 dest 2:
Mon Jan 08 21:49:48 2018
Destination LOG_ARCHIVE_DEST_1 is SYNCHRONIZED
Mon Jan 08 21:49:49 2018
Destination LOG_ARCHIVE_DEST_1 no longer supports SYNCHRONIZATION
Mon Jan 08 21:49:49 2018
Thread 1 advanced to log sequence 369 (LGWR switch)
  Current log# 2 seq# 369 mem# 0: +DATADG/ORCLDG/ONLINELOG/group_2.401.962961191
  Current log# 2 seq# 369 mem# 1: +DATADG/ORCLDG/ONLINELOG/group_2.404.962961191
Mon Jan 08 21:49:49 2018
Archived Log entry 383 added for thread 1 sequence 368 ID 0x58e622f8 dest 2:

5、小結(jié)
要理解本地歸檔路徑參數(shù)的具體含義