数据库启动时有莫名的提示map size mismatch; abort

2^#

发表于 2012-7-10 12:41:55

上传 alert.log 为附件

3^#

发表于 2012-7-10 12:53:15

回复2#

目前，我只需要利用参数文件启动到nomount状态。，现在倒是能启动到nomount,但就是搞不懂那些提示会不会有什么影响。

alert_db1.txt

3.43 KB, 下载次数: 2187

4^#

发表于 2012-7-10 12:57:00

回复 2# 的帖子

大师，我上传了aler.log

5^#

发表于 2012-7-10 13:11:58

startup nomount 之后查一下以下信息并贴出来

col name for a40
col value for a40
col describ for a40
set linesize 130

SELECT x.ksppinm NAME, y.ksppstvl VALUE, x.ksppdesc describ
FROM SYS.x$ksppi x, SYS.x$ksppcv y
WHERE x.inst_id = USERENV ('Instance')
AND y.inst_id = USERENV ('Instance')
AND x.indx = y.indx
AND upper(x.ksppinm) like '%NUMA%';

6^#

发表于 2012-7-10 13:15:57

回复 5# 的帖子

SQL> set pages 9999;
SQL> SELECT x.ksppinm NAME, y.ksppstvl VALUE, x.ksppdesc describ
FROM SYS.x$ksppi x, SYS.x$ksppcv y
WHERE x.inst_id = USERENV ('Instance')
AND y.inst_id = USERENV ('Instance')
AND x.indx = y.indx
AND upper(x.ksppinm) like '%NUMA%';  2 3 4 5 6

NAME                                        VALUE                                        DESCRIB
---------------------------------------- ---------------------------------------- ----------------------------------------
_rm_numa_sched_enable                      FALSE                                        Is Resource Manager (RM) related NUMA sc
                                                                              heduled policy enabled

_NUMA_pool_size                         Not specified                               aggregate size in bytes of NUMA pool
_enable_NUMA_optimization                TRUE                                        Enable NUMA specific optimizations
_NUMA_instance_mapping                      Not specified                               Set of nodes that this instance should r
                                                                              un on

_rm_numa_simulation_pgs                0                                        number of PGs for numa simulation in res
                                                                              ource manager

_rm_numa_simulation_cpus                0                                        number of cpus per PG for numa simulatio
                                                                              n in resource manager

_db_block_numa                               2                                        Number of NUMA nodes

7 rows selected.

7^#

发表于 2012-7-10 13:18:02

alter system set "_enable_NUMA_optimization"= false scope=spfile;
alter system set "_db_block_numa"=1 scope=spfile;

startup force nomount;

8^#

发表于 2012-7-10 13:30:20

回复 7# 的帖子

太牛了，没有那个提示了。对了，这是准备上线的库。不知道这样改会不会有什么影响。

9^#

发表于 2012-7-10 13:35:20

回复刘总#

哪里能找到那两个参数的说明呢，学习一下。

10^#

发表于 2012-7-10 13:42:16

Description

Oracle NUMA (Non Uniform Memory Architecture) support can be used with large SMP multiprocessor environments with NUMA hardware. When enabled Oracle NUMA support facilitates efficient use of underlying NUMA hardware and may improve database performance.

Oracle NUMA support needs the right combination of hardware, operating system and Oracle version.

With 10.2.0.4 and 11.1.0.7 patchsets, Oracle NUMA support can be enabled on common Operating Systems like AIX, HP-UX, Solaris, Linux and Windows if the underlying hardware characteristic is NUMA.

When running an Oracle database with NUMA support in a NUMA capable environment, Oracle will by default detect if the hardware and operating system are NUMA capable and enable Oracle NUMA support.

Some OS upgrades/patches may enable NUMA (For example on Linux NUMA is enabled with kernel release 2.6.9-67). Care should be taken before enabling NUMA support or leaving it on by default. Please see below under the âRecommendationâ section. Contact your hardware vendor for recommendation and information on your system and operating system NUMA capabilities
Likelihood of Occurrence

The symptoms described in the following section generally occur when:

Oracle database NUMA support is enabled
Both operating system and hardware are NUMA capable.

And :

Database workload is memory constrained (or apply too much memory pressure on a given NUMA memory pool)
Dynamic reconfiguration events change the characteristics of the hardware or partition (e.g number of CPUs, memory available).

Some issues are OS/hardware specific. See bugs caused by NUMA section below.

Dynamic reconfiguration events removing resources from NUMA system such as an entire cell and all its processors are not supported (Please review Note:761065.1)
Possible Symptoms

The problems manifest usually with crashes with internal errors including:

ORA-4031
ORA-600 with argument KSKRECONFIGNUMA2
ORA-600 with argument KSBASEND_INTERNAL
ORA-600 with argument KSMHEAP_ALLOC1
ORA-27302: FAILURE OCCURRED AT: SSKGXPCRE3

Workaround or Resolution
Recommendation

Customers who have their SLAâs unaffected with NUMA enabled can continue to run with no changes.
It is strongly recommended to customers who want to enable NUMA do sufficient testing before going into production.
Apply all the bug fixes or patchset required for your Oracle database version. Fixes for all known NUMA issues in the Oracle database is available for download. Please review the known bugs section.

To disable NUMA consult the section "Steps to disable NUMA" covering the instructions to disable NUMA at the Oracle database level. To disable NUMA at the operating system or hardware level contact your hardware vendor.

Please review the "Caution" section below when disabling NUMA.
Caution

Disabling or enabling NUMA can change application performance.
It is strongly recommended to evaluate the performance after disabling or before enabling NUMA in a test environment.
Operating system and/or hardware configuration may need to be tuned or reconfigured when disabling Oracle NUMA support. Consult your hardware vendor for more information or recommendation

Steps to disable NUMA

Customers can download and apply patch for Bug 8199533 to disable NUMA support. This is a database patch and should be applied to the Database home. This patch is available for common platforms on 10.2.0.4 and 11.1.0.7 releases.
If you apply patch for Bug 8199533 then Oracle will no longer enabled NUMA support by default even if it detects a NUMA capable environment.
Oracle support does not recommended using init.ora parameter "_enable_NUMA_optimization" to disable NUMA. Customers should apply fix for Patch 8199533 to disable NUMA . The patch is rolling upgradeable.
This patch does not need to be applied to the ASM home. However if the same Oracle home is used for both RDBMS and ASM instances then this patch can be applied to the Oracle home.

To enable NUMA optimization after applying patch 8199533, set init.ora parameter _enable_NUMA_optimization=TRUE

上面的参数禁用了 NUMA ， NUMA的介绍可以参考上面的文档，不推荐使用 Linux 6.2 + 10gR2这样的组合，如果使用的话本质上我也建议禁用NUMA

11^#

发表于 2012-7-10 13:47:44

回复 10# 的帖子

嗯，再次感谢刘总^_^

albert

12^#

发表于 2013-1-9 09:31:21

每天登陆刘大的网站必有收获
学习了