Getting ORA-01476 during execution of DBMS_STATS.GATHER_SCHEMA_STATS

发表于 2012 年 3 月 2 日 由 惜分飞

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标题：Getting ORA-01476 during execution of DBMS_STATS.GATHER_SCHEMA_STATS

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

alert日志

Fri Jan 27 22:00:09 2012
GATHER_STATS_JOB encountered errors.  Check the trace file.
Fri Jan 27 22:00:09 2012
Errors in file /oracle10/admin/ocs/bdump/ocs1_j001_29138.trc:
ORA-01476: divisor is equal to zero

trace内容

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
ORACLE_HOME = /oracle10/app/product/db/10.2.0
System name:    HP-UX
Node name:      ocsdb1
Release:        B.11.23
Version:        U
Machine:        ia64
Instance name: ocs1
Redo thread mounted by this instance: 1
Oracle process number: 60
Unix process pid: 29138, image: oracle@ocsdb1 (J001)

*** ACTION NAME:(GATHER_STATS_JOB) 2012-01-27 22:00:09.308
*** MODULE NAME:(DBMS_SCHEDULER) 2012-01-27 22:00:09.308
*** SERVICE NAME:(SYS$USERS) 2012-01-27 22:00:09.308
*** SESSION ID:(988.31342) 2012-01-27 22:00:09.307
ORA-01476: divisor is equal to zero
*** 2012-01-27 22:00:09.417
GATHER_STATS_JOB: GATHER_TABLE_STATS('"OCS_SM"','"HLP_SMS_SEND"','""', ...)
ORA-01476: divisor is equal to zero

错误原因
oracle unpublished Bug 5645718

解决方法
1.Setting event 38041 at level 16

sql> connect / as sysdba
sql> alter system set events '38041 trace name context forever, level 16';

2.Patch 6319761

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《Getting ORA-01476 during execution of DBMS_STATS.GATHER_SCHEMA_STATS》有 2 条评论

  1. 惜分飞 说：
    2012 年 3 月 2 日14:33

    Getting ORA-01476 during execution of DBMS_STATS.GATHER_SCHEMA_STATS [ID 464440.1]

    Applies to:

Oracle Server - Enterprise Edition - Version: 9.2.0.1 to 10.2.0.4 - Release: 9.2 to 10.2
Information in this document applies to any platform.
Symptoms

-- Problem Statement:
Intermittent ORA-01476: divisor is equal to zero when running gather schema stats.

*
ERROR at line 1:
ORA-01476: divisor is equal to zero
ORA-06512: at "SYS.DBMS_STATS", line 13313
ORA-06512: at "SYS.DBMS_STATS", line 13659
ORA-06512: at "SYS.DBMS_STATS", line 13737
ORA-06512: at "SYS.DBMS_STATS", line 13696
ORA-06512: at line 1

Analyse using dbms_stats.gather_table_stats gives errors for a table. But, it generally runs fine. The error is intermittent but still occurs occassionally.



Cause

Bug 5645718 (internal bug) 10.2.0.2 RDBMS 10.2.0.2 QRY OPTIMIZER PRODID-5 PORTID-197 ORA-1476 
Abstract: ORA-1476 DBMS_STATS.GATHER_TABLE_STATS
--> Fixed-Releases: 10.2.0.4,  11.1.0.6

Bug 6319761 10.2.0.3 RDBMS 10.2.0.3 QRY OPTIMIZER PRODID-5 PORTID-23 ORA-1476
Abstract: DBMS_STATS.GATHER_SCHEMA_STATS IS FAILING WITH ORA-1476
--> Fixed-Release: 11.1.0.7

Both bugs are related to scaling of "number of distinct values" with popular values while gathering stats. 
Solution

Solution is to  disable popular values adjustment for NDV scaling.

-- To implement the solution, please execute the following steps::
sql> connect / as sysdba
sql> alter system set events '38041 trace name context forever, level 16';
  2. 惜分飞 说：
    2012 年 3 月 2 日14:32

    DBMS_STATS fails with ORA-01476 with patch 5645718 applied [ID 456857.1]

    Applies to:

Oracle Server - Enterprise Edition - Version: 9.2.0.8 to 10.2.0.4 - Release: 9.2 to 10.2
Information in this document applies to any platform.
Symptoms

1)While gathering stats using

DBMS_STAT.GATHER_DATABASE_STATS we encouter the following error 

begin 
* 
ERROR at line 1: 
ORA-01476: divisor is equal to zero 
ORA-06512: at "SYS.DBMS_STATS", line 13313 
ORA-06512: at "SYS.DBMS_STATS", line 13659 
ORA-06512: at "SYS.DBMS_STATS", line 13803 
ORA-06512: at "SYS.DBMS_STATS", line 13767 
ORA-06512: at line 3 



2)Patch 5645718  is already applied.

3)Setting event 38041 at level 24 resolves the problem

 

Cause

Bug 6319761

The bug is fixed in version 11g and backport is feasible.

 


.

Solution

Download and apply  Patch 6319761 if available for  your platform

and release from metalink.