11.2.0.3 adg库因 bug 16427872 导致smon占用大量cpu

发表于 2014 年 1 月 8 日 由 惜分飞

检查数据库发现客户有一套核心的ADG库smon进程负载异常,单进程一直持有cpu 100%

[oracle@q9adg01 trace]$ top -c
top - 14:00:14 up 83 days, 21:39,  4 users,  load average: 10.34, 11.55, 11.25
Tasks: 1162 total,   3 running, 1157 sleeping,   0 stopped,   2 zombie
Cpu(s):  1.7%us,  1.2%sy,  0.0%ni, 86.2%id, 10.7%wa,  0.0%hi,  0.1%si,  0.0%st
Mem:  264253752k total, 200445076k used, 63808676k free,   757684k buffers
Swap: 33554424k total,        0k used, 33554424k free,  6529220k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND        
 5707 oracle    25   0  150g  20m  16m R 99.9  0.0  14273:00 ora_smon_q9db1 
 5285 oracle    16   0 13564 1952  820 R 31.5  0.0   0:02.49 top -c         
 5713 oracle    18   0  150g  20m  17m S  5.3  0.0 410:01.33 ora_asmb_q9db1 
 5821 oracle    15   0  150g  23m  17m S  5.3  0.0   4883:29 ora_lck0_q9db1 
 7596 oracle    15   0  150g  69m  37m S  5.3  0.0   5368:28 ora_pr00_q9db1 


[oracle@q9adg02 ~]$ top -c
top - 14:00:03 up 84 days, 19:36,  3 users,  load average: 6.46, 6.96, 6.76
Tasks: 1045 total,   5 running, 1040 sleeping,   0 stopped,   0 zombie
Cpu(s):  1.8%us,  1.0%sy,  0.0%ni, 93.4%id,  3.7%wa,  0.0%hi,  0.1%si,  0.0%st
Mem:  264253752k total, 196879216k used, 67374536k free,   425320k buffers
Swap: 33554424k total,        0k used, 33554424k free,  4727836k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND        
11615 oracle    25   0  150g  16m  14m R 100.0  0.0  14272:55 ora_smon_q9db2
18173 oracle    16   0  150g  73m  37m D 18.6  0.0  24:33.91 oracleq9db2 (LOCAL=NO) 
 6561 oracle    15   0  150g  31m  25m R 12.2  0.0   0:48.50 oracleq9db2 (LOCAL=NO)

数据库版本和patch信息

14:18:05 sys@Q9DB>select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production


SQL>  SELECT INST_ID,DATABASE_ROLE,OPEN_MODE FROM GV$DATABASE;

   INST_ID DATABASE_ROLE    OPEN_MODE
---------- ---------------- --------------------
         2 PHYSICAL STANDBY READ ONLY WITH APPLY
         1 PHYSICAL STANDBY READ ONLY WITH APPLY

SQL >select inst_id,STARTUP_TIME from gv$instance;

   INST_ID STARTUP_T
---------- ---------
         2 01-NOV-13
         1 01-NOV-13

[oracle@q9adg01 trace]$ /u01/app/oracle/product/11.2.0/db_1/OPatch/opatch  lspatches
16056266;Database Patch Set Update : 11.2.0.3.6 (16056266)
16315641;Grid Infrastructure Patch Set Update : 11.2.0.3.6 (16083653)

SYSAUX表空间增加数据文件

SQL> select ts# from v$tablespace where name='SYSAUX';

       TS#
----------
         2

SQL> select file#,name,creation_time from v$datafile where ts#=2;

     FILE# NAME                                               CREATION_
---------- -------------------------------------------------- ---------
         3 +DATA/q9db/datafile/sysaux.1412.818566605          12-MAR-08
       151 +DATA/q9db/datafile/sysaux.1431.818566885          26-MAR-12
       221 +DATA/q9db/datafile/sysaux.828.818547945           16-APR-12
      1744 +DATA/q9db_adg/datafile/sysaux.2050.835459505      29-DEC-13

核对数据库确实在2013年12月29日对SYSAUX表空间增加了数据文件而且未重启数据库,触发Bug 16427872 Standby SMON spins on CPU after add/drop SYSAUX datafile on primary
bug-16427872
Bug 16427872 Standby SMON spins on CPU after add/drop SYSAUX datafile on primary
在12.1.0.1中修复,在未修复前增加/删除sysaux的数据文件后,通过重启实例来解决该问题

发表在 Oracle Bug | 标签为 | 一条评论

multipath实现设备用户组设置

发表于 2014 年 1 月 7 日 由 惜分飞

现在的Linux系统中,很多都会使用系统自带的multipath多路径软件,在以前的版本中,我们一般通过multipath+udev或者multipath+rc.local来实现多路径和权限设置,而在redhat 5.3-5.11的版本中multipath就直接可以实现多路径聚合、设备持久化、用户组设置
操作系统版本

[root@rac1 dev]# uname -r
2.6.39-300.26.1.el5uek

[root@rac1 dev]# more /etc/issue
Oracle Linux Server release 5.9
Kernel \r on an \m

fdisk记录

[root@rac1 dev]# fdisk -l 
…………
Disk /dev/sdh: 134.2 GB, 134217728000 bytes
255 heads, 63 sectors/track, 16317 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System

Disk /dev/sdi: 33.5 GB, 33554432000 bytes
64 heads, 32 sectors/track, 32000 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes

   Device Boot      Start         End      Blocks   Id  System

multipath包
检查安装multipath相关包(该版本系统默认安装)

[root@rac1 dev]# rpm -aq|grep mapper
device-mapper-multipath-libs-0.4.9-56.0.3.el5
device-mapper-event-1.02.67-2.el5
device-mapper-1.02.67-2.el5
device-mapper-multipath-0.4.9-56.0.3.el5

获取wwid值

[root@rac1 dev]# /sbin/scsi_id -g -u -s /block/sdh
14f504e46494c45527049754962662d395751372d68356743
[root@rac1 dev]# /sbin/scsi_id -g -u -s /block/sdi
14f504e46494c4552484d486249782d464471382d354f4b58

获取uid和gid

[root@rac1 dev]# id grid
uid=1100(grid) gid=54321(oinstall) groups=54321(oinstall),1020(asmadmin),1021(asmdba)

multipath.conf配置

[root@rac1 dev]# vi /etc/multipath.conf

defaults {
user_friendly_names no
queue_without_daemon no
flush_on_last_del yes
max_fds max
}

blacklist {
devnode "^hd[a-z]"
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^cciss.*"
}

devices {
        device {
                vendor                  "OPNFILER "
                product                 "LUN"
                path_grouping_policy    group_by_prio
                features             "3 queue_if_no_path pg_init_retries 50"
                getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
                path_checker            tur
                path_selector           "round-robin 0"
                hardware_handler        "1 alua"
                failback               immediate
                rr_weight              uniform
                rr_min_io             128
        }
}

multipaths {
        multipath {
                wwid                    14f504e46494c45527049754962662d395751372d68356743  #wwid
                alias                   xifenfei128
                uid                     1100                                               #uid
                gid                     1020                                               #gid
        }



        multipath {
                wwid                    14f504e46494c4552484d486249782d464471382d354f4b58   #wwid
                alias                   xifenfei32                                          
                uid                     1100                                                #uid
                gid                     1020                                                #gid
         }
}

启动multipath

[root@rac1 dev]# modprobe dm-multipath 
[root@rac1 dev]# modprobe dm-round-robin 
[root@rac1 dev]# chkconfig multipathd on
[root@rac1 dev]# service multipathd start 
Starting multipathd daemon: [  OK  ]
[root@rac1 dev]# multipath -F
[root@rac1 dev]# multipath -v2
create: xifenfei128 (14f504e46494c45527049754962662d395751372d68356743) undef OPNFILER,VIRTUAL-DISK
size=125G features='0' hwhandler='0' wp=undef
`-+- policy='round-robin 0' prio=1 status=undef
  `- 3:0:0:9  sdh 8:112 undef ready  running
create: xifenfei32 (14f504e46494c4552484d486249782d464471382d354f4b58) undef OPNFILER,VIRTUAL-DISK
size=31G features='0' hwhandler='0' wp=undef
`-+- policy='round-robin 0' prio=1 status=undef
  `- 3:0:0:10 sdi 8:128 undef ready  running

查看生成多路径设备
注意设备名称、组、用户

[root@rac1 dev]# ls -l /dev/mapper/xifenfei*
brw-rw---- 1 grid asmadmin 252, 2 Jan  7 21:21 /dev/mapper/xifenfei128
brw-rw---- 1 grid asmadmin 252, 3 Jan  7 21:21 /dev/mapper/xifenfei32

补充Linux 6.x中udev设置所属组和权限
对于linux 6.x,multipath不能设置磁盘所属组和权限,可以通过udev进行实现,类似配置如下

[root@bxrac03 mapper]#cat 99-diskownership.rules

SUBSYSTEM!="block", GOTO="quickexit"
KERNEL!="dm-*", GOTO="quickexit"
PROGRAM=="/sbin/dmsetup info -c --noheadings -o name -m %m -j %M"
RESULT=="*ocr*", OWNER="grid", GROUP="oinstall", MODE="0660"
RESULT=="*oradata", OWNER="grid", GROUP="oinstall", MODE="0660"
RESULT=="*backup", OWNER="grid", GROUP="oinstall", MODE="0660"
LABEL="quickexit"

其中RESULT和dm的别名向匹配

发表在 Linux | 标签为 | 3 条评论

数据库恢复检查脚本(Oracle Database Recovery Check)

发表于 2014 年 1 月 5 日 由 惜分飞

Oracle Database Recovery Check 介绍
根据多年来的数据库恢复经验,提炼出来数据库恢复关键点信息收集脚本(Oracle Database Recovery Check)，该脚本主要是在数据库mount状态情况下查询数据库的一些基础表信息等信息，不对数据库进行任何写操作(只做读和dump操作)，不会在坏的数据库基础之上带来任何破坏，不影响任何数据库后续的恢复工作。通过该脚本收集信息能够快速定位数据库异常原因，并初步判断数据库恢复疑难程度，减少数据库异常恢复诊断时间，提供恢复效率和准确性。

Oracle Database Recovery Check下载
Oracle Database Recovery Check FOR ORACE 11G及其以前版本下载
Oracle Database Recovery Check For Linux/Uinx
Oracle Database Recovery Check For Windows
Oracle Database Recovery Check For ALL
Oracle Database Recovery Check FOR ORACE 12C下载
Oracle Database Recovery Check For Linux/Uinx
Oracle Database Recovery Check For Windows
Oracle Database Recovery Check For ALL

Oracle Database Recovery Check使用说明
1. 根据系统平台下载对应的版本,相应平台,使用unzip/winrar软件解压成sql文件
2. 上传到服务器之上(oracle用户需要有读取权限)
3. 启动数据库到mount状态
4. 在sqlplus中使用@path/check_recover_db.sql文件
5. 发送xifenfei_db_recover_YYYYMMDD.html到dba@xifenfei.com
6. 联系我:手机(17813235971)或者qq(107644445)

操作演示(所有平台,版本操作相同)
unix/liunx平台使用方法(for 12c以前版本,12c版本操作步骤完全相同)

[oracle@xifenfei ~]$ ls -l /home/oracle/check_recover_db_linux.sql 
-rw-r--r-- 1 oracle oinstall 13008 Mar 30 10:36 check_recover_db_linux.sql
[oracle@xifenfei ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sun Mar 30 10:55:58 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount
ORACLE instance started.

Total System Global Area  418484224 bytes
Fixed Size                  1385052 bytes
Variable Size             331353508 bytes
Database Buffers           79691776 bytes
Redo Buffers                6053888 bytes
Database mounted.
SQL> @/home/oracle/check_recover_db_linux.sql 

+----------------------------------------------------------------------------+
|                   Oracle Database Recovery Check Result                    |
|----------------------------------------------------------------------------+
|  Copyright (c) 2012-2014 xifenfei. All rights reserved. (www.xifenfei.com) |
+----------------------------------------------------------------------------+

Please start the database to mount state.
Note: Do not modify any inspection results
Please refer to the use of the script://www.xifenfei.com/5056.html
To send xifenfei_db_recover_YYYYMMDD.html to dba@xifenfei.com or QQ(107644445)
-----Oracle Database Recovery Check STRAT-----

----Starting Collect Data Dictionary Information----

----Starting Collect PATCH Information----

----Starting Collect ALERT LOG Information----

----Starting DUMP file_hdrs Information----

----Starting DUMP controlf Information----

----Starting DUMP redohdr Information----

-----Oracle Database Recovery Check END-----
********************************************************************************
Please check and upload /home/oracle/xifenfei_db_recover_20140330.html
********************************************************************************
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

生成的html文件为:/home/oracle/xifenfei_db_recover_20140330.html

win平台使用方法(for 12c版本,12c以前版本操作步骤完全相同)

C:\Users\XIFENFEI>dir E:\SkyDrive\ORACLE\tools\db_recover\check_recover_db_win_12c.sql
 驱动器 E 中的卷是 本地磁盘
 卷的序列号是 000C-3B41

 E:\SkyDrive\ORACLE\tools\db_recover 的目录

2014-03-29  23:43            11,101 check_recover_db_win_12c.sql
               1 个文件         11,101 字节
               0 个目录 19,557,310,464 可用字节

C:\Users\XIFENFEI>sqlplus / as sysdba

SQL*Plus: Release 12.1.0.1.0 Production on 星期日 3月 30 11:01:37 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

已连接到空闲例程。

SQL> startup mount
ORACLE 例程已经启动。

Total System Global Area  400846848 bytes
Fixed Size                  2440024 bytes
Variable Size             289408168 bytes
Database Buffers          100663296 bytes
Redo Buffers                8335360 bytes

SQL> @E:\SkyDrive\ORACLE\tools\db_recover\check_recover_db_win_12c.sql

+----------------------------------------------------------------------------+
|                   Oracle Database Recovery Check Result                    |
|----------------------------------------------------------------------------+
|  Copyright (c) 2012-2014 xifenfei. All rights reserved. (www.xifenfei.com) |
+----------------------------------------------------------------------------+

Please start the database to mount state.
Note: Do not modify any inspection results
Please refer to the use of the script://www.xifenfei.com/5056.html
To send xifenfei_db_recover_YYYYMMDD.html to dba@xifenfei.com or QQ(107644445)
 驱动器 C 中的卷没有标签。
 卷的序列号是 D053-8FE1

 C:\Users\XIFENFEI 的目录

2014-03-30  11:02            32,796 xifenfei_db_recover_20140330.html
               1 个文件         32,796 字节
               0 个目录  8,444,190,720 可用字节
********************************************************************************
Please check and upload "xifenfei_db_recover_YYYYMMDD.html" in current directory
********************************************************************************
从 Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options 断开

生成的html文件为C:\Users\XIFENFEI\xifenfei_db_recover_20140330.html
发表在 Oracle备份恢复 | 标签为 , , , , , | 2 条评论