log file switch (archiving needed) 等待事件一例
阿新 • • 發佈:2018-04-15
log file switch archiving needed 一、環境描述
Oracle 11g RAC
Oracle 11g RAC
二、問題描述
客戶執行批處理長時間無法完成。
三、問題處理過程
1、查看等待事件 SQL> select inst_id,event,count(*) from gv$session where wait_class<>‘Idle‘ group by inst_id,event order by 1,2; INST_ID EVENT COUNT(*) ---------- ----------------------------------- ---------- 2 SQL*Net message to client 1 2 buffer busy waits 4 2 log file switch (archiving needed) 5 SQL> 2、查看告警日誌 2018-04-15 10:33:02.004000 +08:00 Suppressing further error logging of LOG_ARCHIVE_DEST_1. Suppressing further error logging of LOG_ARCHIVE_DEST_1. ARCH: Archival stopped, error occurred. Will continue retrying ORACLE Instance orcl2 - Archival Error ORA-16038: log 22 sequence# 274 cannot be archived ORA-19504: failed to create file "" ORA-00312: online log 22 thread 2: ‘+DATADG/orcl/onlinelog/redo22_01.log‘ Archiver process freed from errors. No longer stopped ARC4: LGWR is actively archiving destination LOG_ARCHIVE_DEST_2 ARCH: Archival stopped, error occurred. Will continue retrying ORACLE Instance orcl2 - Archival Error ORA-16014: log 22 sequence# 274 not archived, no available destinations ORA-00312: online log 22 thread 2: ‘+DATADG/orcl/onlinelog/redo22_01.log‘ 3、查看ASM磁盤組 [root@roidb2 ~]# su - grid <roidb2:+ASM2:/home/grid>$asmcmd -p ASMCMD [+] > lsdg State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name MOUNTED NORMAL N 512 4096 1048576 12288 11362 4096 3633 0 Y CRSDG/ MOUNTED EXTERN N 512 4096 1048576 6144 76 0 76 0 N DATADG/ ASMCMD [+] > 4、通過以上信息發現ASM磁盤組空間已被耗盡,無法進行歸檔操作,清理部分歸檔日誌即可解決問題。這裏我們通過查看等待事件很容易定位到問題。
四、參考官方文檔
Resolving Issues Where ‘log file switch (archiving needed)‘ Waits Occur Because Log has not yet been Archived (文檔 ID 1476444.1)
log file switch (archiving needed) 等待事件一例