Home Database Mysql Tutorial ORA-12547经典错误处理

ORA-12547经典错误处理

Jun 07, 2016 pm 05:12 PM

ORA-12547错误处理 今天,领导告知我,让我帮一同事将Oracle安装下,他在安装的过程中出现了问题,报错,无法继续安装。 一

ORA-12547错误处理

今天,领导告知我,让我帮一同事将Oracle安装下,他在安装的过程中出现了问题,报错,无法继续安装。
     
一、由于NLS_LANG设置错误,导致ora-12547错误
我过去看了看,发现在AIX5.3系统中使用DBCA建库到最后一步点完成后立即就出现了ORA-12547 tns lost connect  这个错误,当时感觉挺蹊跷的,随后对系统的环境做了详细检查,异步IO是开启来的,HOST文件也是正常的,参数文件貌似也没有太大的问题,ulimit限制也都改成了-1; 也没有发现有明显的问题,安装日志里面是已经告诉说是操作系统环境不满足。当时实在是查不出来到底是什么原因导致就把之前安装的DBSOFT给删除了,重新进行DBSOFT的安装和建库,DBSOFT的安装中没有报任何错,到最好还是一样的问题,只好再次进行再次的检查,发现了在oracle用户环境配置文件里[db:oracle]$cat~/.profile里发现了NLS_LANG=ZHS16GBK这个参数,后面想想看这个参数并不是必须的,而且有可能会导致安装的时候报错,随即将其禁用掉,参数文件如下:$ cat .profile

PATH=/usr/bin:/etc:/usr/sbin:/usr/ucb:$HOME/bin:/usr/bin/X11:/sbin:.
export PATH
if [ -s "$MAIL" ]           # This is at Shell startup.  In normal
then echo "$MAILMSG"        # operation, the Shell checks
fi                          # periodically.
ORACLE_BASE=/oracle
ORACLE_SID=orcl
ORACLE_HOME=$ORACLE_BASE/app/10.2.0/db_1
#NLS_LANG=ZHS16GBK
PATH=$ORACLE_HOME/bin:$PATH:
export  ORACLE_BASE ORACLE_SID ORACLE_HOME  PATH
$
   将其禁用后,再次DBCA建库,故障没有再重现,成功建库。
  
二、dbca建库出现这个问题,后面在网上搜索了下,基本上是由如下四种原因导致:
  1、异步IO导致dbca报ORA-12547
解决办法:
  AIX:
  a、smitty chaio  (只有AIX 5系列支持)
  b、把STATE to be configured at system restart 设置成available
  c、再次运行DBCA创建成功
  HP-UNIX 可以参考(Metalink Note:139272.1)
 
  a. 创建aio字符设备
   # /sbin/mknod /dev/async c 101 0x0
   # chown oracle:dba /dev/async
   # chmod 660 /dev/async
 
  b.用sam调整内核参数
     -> Kernel Configuration
        -> Drivers
           -> 选择'asyncdsk'
           -> Actions>Add Driver to Kernel. (此时pending state由out变为in状态)
      -> Kernel Configuration
        -> Configurable Parameters
           -> max_async_ports
              设置为初始化文件中的'processes'值+oracle后台进程数 (根据v$bgprocess,单实例后台进程数最多为78个)
 
  c. 用sam设置aio_max_ops
     -> Kernel Configuration
        -> Configurable Parameters
           -> aio_max_ops
           -> 可设置为默认值2048
       
  以上配置,主机需重构核心,,重启.   
  d. 设置oracle用户必须有MLOCK权限。
   a. 设定dba组的MLOCK的权限
      roolt#setprivgrp dba MLOCK
 
    b. 避免重启后失效,需要设置:
       vi /etc/privgroup 添加如下行:
       dba MLOCK
  e.检查一下aio是否生效了
   #fuser /dev/async
   有进程列出来说明aio已经生效了。
 
 
 
  2、ulimit默认值没有修改
解决办法:
  Linux
  a、修改limits参数文件,添加如下内容
  vi /etc/security/limits.conf
  oracle soft nproc 2047
  oracle hard nproc 16384
  oracle soft nofile 1024
  oracle hard nofile 65536

  AIX
  a、修改limits参数文件,在最后如下添加如下内容:(注:-1为无限制使用)
  vi /etc/security/limits
default:     
fsize = -1   
core = 2097151
cpu = -1     
data = 262144
rss = 65536  
stack = 65536
nofiles = 2000
root: 
daemon:
bin:  
sys:  
adm:  
uucp: 
guest:
nobody:
lpd:  
oracle:  
data = -1
stack = -1


  3、Linux 下SELinux配置不正确,解决办法
  a、用root用户登录系统执行 setenforce 0   (不需要重启)
  b、修改/etc/selinux/config文件中的SELINUX="" 为 disabled ,需要重启

   4、libaio(x86_64) is not installed(同AIX一样,是开启异步IO,在Linux下打这个包)
解决办法:
a、插入操作系统安装光盘
b、root用户登录系统挂载操作系统安装光盘:
   #mount -t iso9660 /dev/cdrom /mnt
   #cd /mnt/Server
c、检查并安装libaio包,执行如下命令
   #rpm -qa| grep -i ^libaio
   #rpm -ivh libaio-*.i386.rpm
   #rpm -ivh libaio-*.x86_64.rpm
d、检查刚才安装的包是否成功
   #rpm -qa | grep ^libaio
e、再次执行安装,问题解决

更多Oracle相关信息见Oracle 专题页面 ?tid=12

linux

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

When might a full table scan be faster than using an index in MySQL? When might a full table scan be faster than using an index in MySQL? Apr 09, 2025 am 12:05 AM

Full table scanning may be faster in MySQL than using indexes. Specific cases include: 1) the data volume is small; 2) when the query returns a large amount of data; 3) when the index column is not highly selective; 4) when the complex query. By analyzing query plans, optimizing indexes, avoiding over-index and regularly maintaining tables, you can make the best choices in practical applications.

Can I install mysql on Windows 7 Can I install mysql on Windows 7 Apr 08, 2025 pm 03:21 PM

Yes, MySQL can be installed on Windows 7, and although Microsoft has stopped supporting Windows 7, MySQL is still compatible with it. However, the following points should be noted during the installation process: Download the MySQL installer for Windows. Select the appropriate version of MySQL (community or enterprise). Select the appropriate installation directory and character set during the installation process. Set the root user password and keep it properly. Connect to the database for testing. Note the compatibility and security issues on Windows 7, and it is recommended to upgrade to a supported operating system.

Explain InnoDB Full-Text Search capabilities. Explain InnoDB Full-Text Search capabilities. Apr 02, 2025 pm 06:09 PM

InnoDB's full-text search capabilities are very powerful, which can significantly improve database query efficiency and ability to process large amounts of text data. 1) InnoDB implements full-text search through inverted indexing, supporting basic and advanced search queries. 2) Use MATCH and AGAINST keywords to search, support Boolean mode and phrase search. 3) Optimization methods include using word segmentation technology, periodic rebuilding of indexes and adjusting cache size to improve performance and accuracy.

Difference between clustered index and non-clustered index (secondary index) in InnoDB. Difference between clustered index and non-clustered index (secondary index) in InnoDB. Apr 02, 2025 pm 06:25 PM

The difference between clustered index and non-clustered index is: 1. Clustered index stores data rows in the index structure, which is suitable for querying by primary key and range. 2. The non-clustered index stores index key values ​​and pointers to data rows, and is suitable for non-primary key column queries.

MySQL: Simple Concepts for Easy Learning MySQL: Simple Concepts for Easy Learning Apr 10, 2025 am 09:29 AM

MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

Can mysql and mariadb coexist Can mysql and mariadb coexist Apr 08, 2025 pm 02:27 PM

MySQL and MariaDB can coexist, but need to be configured with caution. The key is to allocate different port numbers and data directories to each database, and adjust parameters such as memory allocation and cache size. Connection pooling, application configuration, and version differences also need to be considered and need to be carefully tested and planned to avoid pitfalls. Running two databases simultaneously can cause performance problems in situations where resources are limited.

The relationship between mysql user and database The relationship between mysql user and database Apr 08, 2025 pm 07:15 PM

In MySQL database, the relationship between the user and the database is defined by permissions and tables. The user has a username and password to access the database. Permissions are granted through the GRANT command, while the table is created by the CREATE TABLE command. To establish a relationship between a user and a database, you need to create a database, create a user, and then grant permissions.

RDS MySQL integration with Redshift zero ETL RDS MySQL integration with Redshift zero ETL Apr 08, 2025 pm 07:06 PM

Data Integration Simplification: AmazonRDSMySQL and Redshift's zero ETL integration Efficient data integration is at the heart of a data-driven organization. Traditional ETL (extract, convert, load) processes are complex and time-consuming, especially when integrating databases (such as AmazonRDSMySQL) with data warehouses (such as Redshift). However, AWS provides zero ETL integration solutions that have completely changed this situation, providing a simplified, near-real-time solution for data migration from RDSMySQL to Redshift. This article will dive into RDSMySQL zero ETL integration with Redshift, explaining how it works and the advantages it brings to data engineers and developers.

See all articles