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最近发表
- ORA-00600: internal error code, arguments: [16703], [1403], [4] 原因
- 最近遇到几起ORA-600 16703故障(tab$被清空),请引起重视
- ORA-600 2662快速恢复之Patch scn工具
- TNS-12518: TNS:listener could not hand off client connection
- ora.storage无法启动报ORA-12514故障处理
- 断电引起文件scn异常数据库恢复
- ORA-16188: LOG_ARCHIVE_CONFIG settings inconsistent with previously started instance
- .[hudsonL@cock.li].mkp勒索加密数据库完美恢复
- 模拟带库实现rman远程备份
- 又一例:ORA-600 kclchkblk_4和2662故障
- Oracle误删除数据文件恢复
- Oracle 19C 备库DML重定向—DML Redirection
- ORA-01595/ORA-600 4194处理
- 从ORA-00283 ORA-16433报错开始恢复
- 近期又遇到ORA-600 16703和ORA-702故障
- RECOVER_YOUR_DATA勒索恢复
- ORA-01033: ORACLE initialization or shutdown in progress 故障处理
- Oracle 19c/21c最新patch信息-202401
- 存储故障,强制拉库报ORA-600 kcbzib_kcrsds_1处理
- ORA-600 kcrf_resilver_log_1故障处理
分类目录归档:Oracle Bug
sysaux中HEATMAP 对象较大
在一次数据检查中,发现HEATMAP对象比较大
SQL> select * from v$version; BANNER CON_ID -------------------------------------------------------------------------------- ---------- Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production 0 PL/SQL Release 12.1.0.2.0 - Production 0 CORE 12.1.0.2.0 Production 0 TNS for Linux: Version 12.1.0.2.0 - Production 0 NLSRTL Version 12.1.0.2.0 - Production 0 SQL> col owner for a30 SQL> col segment_name for a30 SQL> col segment_type for a20 set lines 150 SELECT owner, segment_name, segment_type, sum(bytes/1024/1024/1024) FROM dba_extents WHERE tablespace_name='SYSAUX' and segment_name='HEATMAP' group by owner, segment_name, segment_type;SQL> SQL> 2 3 4 5 OWNER SEGMENT_NAME SEGMENT_TYPE SUM(BYTES/1024/1024/1024) ------------------------------ ------------------------------ -------------------- ------------------------- SYS HEATMAP SYSTEM STATISTICS 1.58789063
检查Heat Map特性为关闭
SQL> show parameter HEAT_MAP; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ heat_map string OFF
查询mos发现相关Bug 20678613 – HEATMAP SIZE IS 500 MB, THOUGH HEAT_MAP IS TURNED OFF.通过设置_drop_stat_segment为1来自动减小HEATMAP(其默认值为0)
---默认值 SQL> col name for a52 SQL> col value for a24 SQL> col description for a50 set linesize 150 select a.ksppinm name,b.ksppstvl value,a.ksppdesc description from x$ksppi a,x$ksppcv b where a.inst_id = USERENV ('Instance') and b.inst_id = USERENV ('Instance') and a.indx = b.indx and upper(a.ksppinm) LIKE upper('%¶m%') SQL> SQL> 2 3 4 5 6 7 order by name / 8 Enter value for param: _drop_stat_segment old 6: and upper(a.ksppinm) LIKE upper('%¶m%') new 6: and upper(a.ksppinm) LIKE upper('%_drop_stat_segment%') NAME VALUE DESCRIPTION ---------------------------------------------------- ------------------------ ---------------------------- _drop_stat_segment 0 drop ilm statistics segment ---设置值 ALTER SYSTEM SET "_drop_stat_segment" =1;
如果需要也可以人工进行删除
exec dbms_space_admin.heat_map_segment_drop;
参见:HEATMAP Segment Size Is Large In SYSAUX Even When Heatmap=Off (Doc ID 2024036.1)
Bug 24704547 : SYS.HEATMAP GROWS IN SIZE IN 12C UNDER SYSAUX TBS
select default$ from col$ where rowid=:1 大量解析
回收站中有大量wri$_rcs表
在对一套Oracle 12.1.0.2的数据库巡检之时发现大量WRI$_RCS_数字_1的表在回收站中,从命名中看该表应该是Oracle某个自动任务处理后,表未被正常处理干净,遗留在回收站中.
查询mos确认是Bug 20114306 – Objects left in recyclebin after upgrade to 12.1.0.2 or with fix for bug 16851194 present – superseded (文档 ID 20114306.8)
可以尝试打上补丁21498770或者23100700然后设置_fix_control
alter system set "_fix_control"='16851194:off' ;
确认该_fix_control是否可以设置,可以查询 v$system_fix_control视图