最近客户单位的oracle数据库出了问题，经常出现无法连接,报错提示
ORA-00257: archiver error, Connect internal only, until freed.，手动清除归档日志后可以恢复访问，但是过不了几天依旧会爆满，每日生成的归档日志很大。经过详细排查发现sysaux表空间使用率达到99.9%,清理该表空间后日志恢复正常！
一、先清理归档日志使得数据库能够正常连接
[root@rac1 ~]# su - grid
grid@+ASM1:/home/grid$ 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 EXTERN N 512 4096 1048576 409600 127 0 127 0 N ARCH/
MOUNTED EXTERN N 512 4096 1048576 1662976 997139 0 997139 0 N DATA/
MOUNTED NORMAL N 512 4096 1048576 30720 29794 10240 9777 0 Y OCRDG/
上述结果可以看到表空间仅仅剩余 127 MB 可用。需要立刻释放空间。
使用rman工具 执行 删除2天前的归档日志
delete archivelog until time "sysdate-2";
[root@rac1 ~]# su - oracle
Password:
oracle@orcl1:/home/oracle$rman target /
Recovery Manager: Release 11.2.0.4.0 Production on Mon Oct 14 13:12:18 2024
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1556520972)
RMAN> delete archivelog until time "sysdate-2";
二、排查问题
- 查看归档日志每天生成情况
发现每天都生成70~80G的日志数据，正常应该2-8G;
RMAN> exit
Recovery Manager complete.
oracle@orcl1:/home/oracle$sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Mon Oct 14 13:12:32 2024
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing optionsSQL>
SQL> SELECT TRUNC(FIRST_TIME) "TIME",SUM(BLOCK_SIZE * BLOCKS) / 1024 / 1024 / 1024 "SIZE(GB)"FROM V$ARCHIVED_LOG GROUP BY TRUNC(FIRST_TIME) order by TRUNC(FIRST_T);TIME SIZE(GB)
------------ ----------
03-OCT-24 75.8037338
04-OCT-24 65.9294729
05-OCT-24 65.2526731
06-OCT-24 71.6385746
07-OCT-24 212.996218
08-OCT-24 138.052895
09-OCT-24 84.8484373
10-OCT-24 262.300638
11-OCT-24 74.3476553
12-OCT-24 70.959806410 rows selected.
- 查看数据库表空间使用情况
发现
SYSAUX表空间使用率达到99.84%
SQL> SELECT F.TABLESPACE_NAME TABLESPACE_NAME,ROUND(((D.SUMBYTES + D.EXTEND_BYTES) / 1024 / 1024 / 1024), 2) TOTAL_G, ROUND((F.SUMBYTES + D.EXTEND_BYTES) / 1024 / 1024 / 1024, 2) FREE_G, ROUND((D.SUMBYTES - F.SUMBYTES) / 1024 / 1024 / 1024, 2) USED_G, ROUND((D.SUMBYTES - F.SUMBYTES) * 100 / (D.SUMBYTES + D.EXTEND_BYTES), 2) USED_PERCENT FROM (SELECT TABLESPACE_NAME, SUM(BYTES) SUMBYTES FROM DBA_FREE_SPACE GROUP BY TABLESPACE_NAME) F, (SELECT TABLESPACE_NAME, SUM(AA.BYTES) SUMBYTES, SUM(AA.EXTEND_BYTES) EXTEND_BYTES FROM (SELECT NVL(CASE WHEN AUTOEXTENSIBLE = 'YES' THEN (CASE WHEN (MAXBYTES - BYTES) >= 0 THEN (MAXBYTES - BYTES) END) END, 0) EXTEND_BYTES, TABLESPACE_NAME, BYTES FROM DBA_DATA_FILES) AA GROUP BY TABLESPACE_NAME) D WHERE F.TABLESPACE_NAME = D.TABLESPACE_NAME ORDER BY USED_PERCENT DESC;TABLESPACE_NAME TOTAL_G FREE_G USED_G USED_PERCENT
------------------------------ ---------- ---------- ---------- ------------
USERS 759.75 57.51 702.24 92.43
SYSAUX 62 .10 61.90 99.84
SYSTEM 32 31.01 .99 3.09
UNDOTBS2 32 31.64 .36 1.12
UNDOTBS1 32 31.94 .06 .18- 查找归sysaux空间占用大于200mb的对象并生成删除sql
查出的对象属于 sys用户 请使用此账户执行如下sql语句的 'OPSQL’字段语句完成清理工作。
SQL> select distinct 'truncate table ' || segment_name || ';' as OPSQL, s.bytes / 1024 / 1024 MB from dba_segments s where s.segment_name like 'WRH$%' and segment_type in ('TABLE PARTITION', 'TABLE') and s.bytes / 1024 / 1024 > 200 order by s.bytes / 1024 / 1024 desc;OPSQL
--------------------------------------------------------------------------------MB
----------
truncate table WRH$_ACTIVE_SESSION_HISTORY;12436truncate table WRH$_EVENT_HISTOGRAM;1984truncate table WRH$_LATCH_MISSES_SUMMARY;1763OPSQL
--------------------------------------------------------------------------------MB
----------
truncate table WRH$_SYSSTAT;1600truncate table WRH$_SEG_STAT;1280truncate table WRH$_PARAMETER;1152OPSQL
--------------------------------------------------------------------------------MB
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truncate table WRH$_SYSTEM_EVENT;978truncate table WRH$_SQL_PLAN;864truncate table WRH$_DLM_MISC;456OPSQL
--------------------------------------------------------------------------------MB
----------
truncate table WRH$_MVPARAMETER;400truncate table WRH$_SERVICE_STAT;312truncate table WRH$_ROWCACHE_SUMMARY;280OPSQL
--------------------------------------------------------------------------------MB
----------
truncate table WRH$_SERVICE_WAIT_CLASS;144truncate table WRH$_SYSMETRIC_HISTORY;144truncate table WRH$_DB_CACHE_ADVICE;120OPSQL
--------------------------------------------------------------------------------MB
----------
truncate table WRH$_SQLTEXT;10416 rows selected.SQL>
三、处理问题
挑选较大的进行清理。如下
SQL> truncate table WRH$_ACTIVE_SESSION_HISTORY;Table has bing truncated.SQL> truncate table WRH$_EVENT_HISTOGRAM;Table has bing truncated.SQL>
四、清理后效果
清理后可能导致客户端掉线情况，重新登录客户端即可。
查看表空间使用情况 如下 SYSAUX 表空间使用率为 50% 多。
隔两天后观察归档日志生成情况如下,已经不在暴增，客户表示非常满意！
