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oracle 序列（oracle序列查询下一个值但已存在）

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如果您想了解oracle序列和oracle序列查询下一个值但已存在的知识，那么本篇文章将是您的不二之选。我们将深入剖析oracle序列的各个方面，并为您解答oracle序列查询下一个值但已存在的疑在这

如果您想了解oracle 序列和oracle序列查询下一个值但已存在的知识，那么本篇文章将是您的不二之选。我们将深入剖析oracle 序列的各个方面，并为您解答oracle序列查询下一个值但已存在的疑在这篇文章中，我们将为您介绍oracle 序列的相关知识，同时也会详细的解释oracle序列查询下一个值但已存在的运用方法，并给出实际的案例分析，希望能帮助到您！

本文目录一览：

oracle 序列（oracle序列查询下一个值但已存在）

oracle 序列（oracle序列查询下一个值但已存在）

在许多的数据库之中都会存在一种自动增长列的概念。像 SQL Server、MySQL、DB2都提供有这样的数据类型，可是惟独在Oracle之中没有（Oracle12C之后提供了，之前没有），但是在Oracle之中提供的是一种手工的自动增长列控制，而这样的控制在Oracle之中使用序列（对象）完成。如果要想进行序列的创建，则要使用如下的语法：

CREATE SEQUENCE  序列名称

[INCREMENT BY 步长] [START WITH 开始值]

[MAXVALUE 最大值 | NOMAXVALUE]

[MINVALUE 最小值 | NOMINVALUE]

[CYCLE | NOCYCLE]

[CACHE 缓存大小 | NOCACHE]

如果用户直接使用“CREATE SEQUENCE序列名称”创建的是一个默认序列，默认序列的数值从1开始，每次增长1，而且没有最大值，最小值为1

 

范例：创建一个默认的序列

CREATE SEQUENCE myseq ;

既然序列属于数据库对象，那么所有的数据库对象一定要保存在数据字典之中，序列的数据字典应该查“user_sequences”数据字典：

SELECT * FROM user_sequences ;

在此数据字典之中主要包含如下列的数据信息：

· SEQUENCE_NAME：表示的序列名称，本处为 MYSEQ；

· MIN_VALUE：表示序列的最小值，默认的序列最小值是 1；

· MAX_VALUE：表示序列的最大值，默认序列是没有最大值，10 28 已经很大了。

· INCREMENT_BY：步长，每次增长的数据，默认的是 1；

· CYCLE：是否为循环序列，如果是 N 表示非循环，如果是 Y表示循环；

· ORDER：表示序列是否排序；

· CACHE_SIZE ：序列的缓存数据；

· LAST_NUMBER ：序列最后一次的增长值。

当一个序列对象已经创建完成之后，那么下面就可以采用如下的两个伪列来进行序列的控制：

· 取得序列下一个增长数据（每次调用序列值都增长指定的步长）： 序列.nextval；

· 取得序列的当前数据（每次调用序列都不增长）： 序列.currval；

·在使用 currval 之前一定要首先使用 nextval，否则会出现“ORA-08002: 序列 MYSEQ.CURRVAL 尚未在此会话中定义”。

范例：操作序列

SELECT myseq.nextval FROM dual ;

SELECT myseq.currval FROM dual ;

 

 

 

解释：关于 user_sequences 数据字典之中的 LAST_NUMBER 和 CACHE 的作用

首先必须明确的是，LAST_NUMBER 并不是当前序列真正增长的数据。

实际上当用户每次进行数据增长控制的时候，LAST_NUMBER 都表示已经处理完的一批序列内容，当当前序列的数值等于了 LAST_NUMBER 数据时，那么会自动再增加指定个“CACHE”大小的序列。

但是由于数据存在有缓存的问题，所以当数据库重新启动之后，那么所操作的序列就可能出现跳号的情况。如果想要避免跳号问题出现，那么最简单的做法是取消缓存，使用 NOCACHE 表示。

现在序列已经创建完成，而且也已经可以正常的进行使用了，可是该如何实现行的自动编号呢？只能够在数据增加的时候手工的进行控制。

 

范例：建立数据表，同时保存数据

DROP TABLE mytab PURGE ;

CREATE TABLE mytab(

mid NUMBER ,

title VARCHAR2(50) ,

CONSTRAINT pk_mid PRIMARY KEY(mid)

) ;



   INSERT INTO mytab(mid,title)

VALUES (myseq.nextval,''JAVA'') ;

在开发之中只能够通过以上的方式实现序列的自动增长操作。

以上的序列创建方式是最为常用的一种方式，而现在也可以通过一些选项的控制，实现一些特殊的序列定义。

1，改变序列增长的步长

默认的序列步长是 1（INCREMENT BY 属性决定的）。

DROP SEQUENCE myseq ;

CREATE SEQUENCE myseq

INCREMENT BY 2 ;

此时每当调用 nextval 访问序列的时候，都会按照 2 进行数据的增长。

2 ，改变序列的开始值

默认的序列开始值是从 1 开始的，但是现在如果希望做一些定单的自动编号生成，则可以使用开始值设置一个较大的数据，这样处理定单编号就比较方便。

DROP SEQUENCE myseq ;

CREATE SEQUENCE myseq

INCREMENT BY 2

START WITH 10000000000000000000;

SELECT TO_CHAR(myseq.nextval,999999999999999999999)

3 ，循环序列

如果说现在希望序列的内容在：1、3、5、7、9 五个数据之间循环显示，那么就需要设置循环序列，而此时需要：

· 序列的最大值是 9；

· 序列的最小值是 1；

· 步长应该为 2。

DROP SEQUENCE myseq ;

CREATE SEQUENCE myseq

INCREMENT BY 2

START WITH 1

MAXVALUE 9 MINVALUE 1

CYCLE NOCACHE;

而利用此方式实际上就可以定义一些简单的抽奖的种子数据。

For oracle databases, if the top showing the oracle database, then oracle process is using the top c

For oracle databases, if the top showing the oracle database, then oracle process is using the top c

Note 805586.1 Troubleshooting Session Administration (Doc ID 805586.1) Note 822527.1 How To Find Where The Memory Is Growing For A Process (Doc ID 822527.1) Note 273646.1 How to diagnose the high cpu utilization of ORACLE.EXE in Windows environment Note 728539.1 Find Blocking Sessions In sqlPLUS Note 61552.1 Troubleshooting Oracle Database Hanging Issues for versions from 7 to 9--Exhaustive Note 164760.1 Detecting and Resolving Locking Conflicts using TopSessions

How I Simplified Oracle Database 12c and 11g Installations on Oracle Linux 6

How I Simplified Oracle Database 12c and 11g Installations on Oracle Linux 6

How I Simplified Oracle Database 12c and 11g Installations on Oracle Linux 6

by Ginny Henningsen; updated by Michele Casey

How to simplify the installation of Oracle Database 12c or 11g on Oracle Linux 6 by installing the oracle-rdbms-server-12cR1-preinstall or oracle-rdbms-server-11gR2-preinstall RPM package, which automatically performs a number of tasks, such as installing required software packages, resolving package dependencies, and modifying kernel parameters.

 

Published September 2012 (updated September 2017)

READ THIS FIRST: Important Changes Since Publication

While the content in this article is still valid, several details have changed.  For example:

  • For Oracle Database 12c Release 2, the preinstall RPM has a different name than the one used in the article belowpu:
    • oracle-database-server-12cR2-preinstall
    • See also this documentation: Automatically Configuring Oracle Linux with Oracle Preinstallation RPM
  • The preinstall RPMs are published on Oracle Linux yum server for both Oracle Linux 6 and 7 in the Latest repositories which are configured and enabled by default in recent releases of Oracle Linux 6 and 7 


 

Introducing the oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall RPM for Oracle Linux

Before installing Oracle Database 12c or 11g on a system, you need to preconfigure the operating environment since the database requires certain software packages, package versions, and tweaks to kernel parameters. (Be sure to review the appropriate Oracle Database installation guide to familiarize yourself with hardware, software, and operating system requirements.)

Want to comment on this article? Post the link on Facebook''s OTN Garage page.  Have a similar article to share? Bring it up on Facebook or Twitter and let''s discuss.

Note: This article applies to Oracle Linux 6. A previous article, "How I Simplified Oracle Database Installation on Oracle Linux," covered performing a similar task on versions of Oracle Linux 5.

On Oracle Linux, I discovered that there is a remarkably easy way to address these installation prerequisites: First, depending on your database version, install either the RPM package called oracle-rdbms-server-12cR1-preinstall or oracle-rdbms-server-11gR2-preinstall. This RPM performs a number of preconfiguration steps, including the following:

  • Automatically downloading and installing any additional software packages and specific package versions needed for installing Oracle Grid Infrastructure and Oracle Database 12 c Release 1 (12.1) or 11g Release 2 (11.2.0.3), with package dependencies resolved via yum or up2date capabilities.
  • Creating the user oracle and the groups oinstall (for OraInventory) and dba (for OSDBA), which are used during database installation. (For security purposes, this user has no password by default and cannot log in remotely. To enable remote login, please set a password using the passwd tool.)
  • Modifying kernel parameters in /etc/sysctl.conf to change settings for shared memory, semaphores, the maximum number of file descriptors, and so on.
  • Setting hard and soft shell resource limits in /etc/security/limits.conf, such as the locked-in memory address space, the number of open files, the number of processes, and core file size.
  • Setting numa=off in the kernel for x86_64 machines.

Note that oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall parses the existing /etc/sysctl.conf and /etc/security/limits.conf files and updates values only as needed for database installation. Any precustomized settings not related to database installation are left as is.

The oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall RPM packages are accessible through the Oracle Unbreakable Linux Network (ULN, which requires a support contract), from the Oracle Linux distribution media, or from the Oracle public yum repository. Thus, whether or not your system is registered with ULN to access Oracle patches and support, you can use oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall to simplify database installation on Oracle Linux. In addition, the Oracle public yum repository now includes all security and bug errata, ensuring systems are secured and stable with the latest security updates and bug fixes.

Installing the oracle-rdbms-server-12cR1-preinstall or oracle-rdbms-server-11gR2-preinstall RPM

The remainder of this article steps through the procedure that I used for installing oracle-rdbms-server-11gR2-preinstall on Oracle Linux via the Oracle public yum repository. The same steps outlined in the following section can be used for either version of the preinstall RPM package. I started with a system running Oracle Linux Release 6 Update 4 for x86_64, a 64-bit version of Oracle Linux that I downloaded from the Oracle software delivery cloud (requires registration or login). First, I set up a yum configuration file that pointed to the correct repository, and then I installed the oracle-rdbms-server-11gR2-preinstall RPM from that repository.

Here are the steps for preconfiguring a system for Oracle Database installation using oracle-rdbms-server-11gR2-preinstall. Remember, the steps are the same when using the oracle-rdbms-server-12cR1-preinstall package; you simply need to change the name of the RPM package during the yum installation step.

  1. As an authorized user (for example, root), retrieve the file that configures repository locations:
      
    # cd /etc/yum.repos.d

# wget http://yum.oracle.com/public-yum-ol6.repo
  2. Using a text editor, modify the file, changing the field enabled=0 to enabled=1 to reflect repositories that correspond to the machine''s operating system release.
     

    Here is an excerpt of public-yum-old6.repo with the changed lines in boldface.

    [ol6_latest]

name=Oracle Linux $releasever Latest ($basearch)

baseurl=http://yum.oracle.com/repo/OracleLinux/OL6/latest/$basearch/

gpgkey=http://yum.oracle.com/RPM-GPG-KEY-oracle-ol6

gpgcheck=1

enabled=1





[ol6_UEK_latest]

name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releasever ($basearch)

baseurl=http://yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/$basearch/

gpgkey=http://yum.oracle.com/RPM-GPG-KEY-oracle-ol6

gpgcheck=1

enabled=1
     

    Because the target system is running Oracle Linux Release 6 Update 4 for x86_64, which installs the Oracle Unbreakable Enterprise Kernel by default, there are two repositories to enable, [ol6_latest] and [ol6_UEK_latest].

  3. Next, install the oracle-rdbms-server-11gR2-preinstall RPM using the yum install command. If you are using Oracle Database 12c, then you would type yum install.
     

    The output in Listing 1 shows how the installation checks dependencies and then downloads and installs the required packages.

    # yum install oracle-rdbms-server-11gR2-preinstall

Loaded plugins: refresh-packagekit, rhnplugin, security

Setting up Install Process

Resolving Dependencies

--> Running transaction check

---> Package oracle-rdbms-server-11gR2-preinstall.x86_64 0:1.0-6.el6 will be installed

--> Processing Dependency: gcc-c++ for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: gcc for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: libaio-devel for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: libstdc++-devel for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: glibc-devel for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: compat-libstdc++-33 for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: ksh for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: compat-libcap1 for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Running transaction check

---> Package compat-libcap1.x86_64 0:1.10-1 will be installed

---> Package compat-libstdc++-33.x86_64 0:3.2.3-69.el6 will be installed

---> Package gcc.x86_64 0:4.4.6-4.el6 will be installed

--> Processing Dependency: cpp = 4.4.6-4.el6 for package: gcc-4.4.6-4.el6.x86_64

--> Processing Dependency: cloog-ppl >= 0.15 for package: gcc-4.4.6-4.el6.x86_64

---> Package gcc-c++.x86_64 0:4.4.6-4.el6 will be installed

--> Processing Dependency: libmpfr.so.1()(64bit) for package: gcc-c++-4.4.6-4.el6.x86_64

---> Package glibc-devel.x86_64 0:2.12-1.80.el6_3.4 will be installed

--> Processing Dependency: glibc-headers = 2.12-1.80.el6_3.4 for package: glibc-devel-2.12-1.80.el6_3.4.x86_64

--> Processing Dependency: glibc-headers for package: glibc-devel-2.12-1.80.el6_3.4.x86_64

---> Package ksh.x86_64 0:20100621-16.el6 will be installed

---> Package libaio-devel.x86_64 0:0.3.107-10.el6 will be installed

---> Package libstdc++-devel.x86_64 0:4.4.6-4.el6 will be installed

--> Running transaction check

---> Package cloog-ppl.x86_64 0:0.15.7-1.2.el6 will be installed

--> Processing Dependency: libppl_c.so.2()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64

--> Processing Dependency: libppl.so.7()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64

---> Package cpp.x86_64 0:4.4.6-4.el6 will be installed

---> Package glibc-headers.x86_64 0:2.12-1.80.el6_3.4 will be installed

--> Processing Dependency: kernel-headers >= 2.2.1 for package: glibc-headers-2.12-1.80.el6_3.4.x86_64

--> Processing Dependency: kernel-headers for package: glibc-headers-2.12-1.80.el6_3.4.x86_64

---> Package mpfr.x86_64 0:2.4.1-6.el6 will be installed

--> Running transaction check

---> Package kernel-uek-headers.x86_64 0:2.6.32-300.32.1.el6uek will be installed

---> Package ppl.x86_64 0:0.10.2-11.el6 will be installed

--> Finished Dependency Resolution



Dependencies Resolved



================================================================================

 Package                         Arch   Version                Repository  Size

================================================================================

Installing:

 oracle-rdbms-server-11gR2-preinstall

                                 x86_64 1.0-6.el6              ol6_latest  15 k

Installing for dependencies:

 cloog-ppl                       x86_64 0.15.7-1.2.el6         ol6_latest  93 k

 compat-libcap1                  x86_64 1.10-1                 ol6_latest  17 k

 compat-libstdc++-33             x86_64 3.2.3-69.el6           ol6_latest 183 k

 cpp                             x86_64 4.4.6-4.el6            ol6_latest 3.7 M

 gcc                             x86_64 4.4.6-4.el6            ol6_latest  10 M

 gcc-c++                         x86_64 4.4.6-4.el6            ol6_latest 4.7 M

 glibc-devel                     x86_64 2.12-1.80.el6_3.4      ol6_latest 970 k

 glibc-headers                   x86_64 2.12-1.80.el6_3.4      ol6_latest 600 k

 kernel-uek-headers              x86_64 2.6.32-300.32.1.el6uek ol6_latest 713 k

 ksh                             x86_64 20100621-16.el6        ol6_latest 684 k

 libaio-devel                    x86_64 0.3.107-10.el6         ol6_latest  13 k

 libstdc++-devel                 x86_64 4.4.6-4.el6            ol6_latest 1.5 M

 mpfr                            x86_64 2.4.1-6.el6            ol6_latest 156 k

 ppl                             x86_64 0.10.2-11.el6          ol6_latest 1.3 M



Transaction Summary

================================================================================

Install      15 Package(s)



Total download size: 25 M

Installed size: 61 M

Is this ok [y/N]: Downloading Packages:

--------------------------------------------------------------------------------

Total                                           710 kB/s |  25 MB     00:35     

Running rpm_check_debug

Running Transaction Test

Transaction Test Succeeded

Running Transaction



  Installing : mpfr-2.4.1-6.el6.x86_64                                     1/15 

  Installing : libstdc++-devel-4.4.6-4.el6.x86_64                          2/15 

  Installing : cpp-4.4.6-4.el6.x86_64                                      3/15 

  Installing : ppl-0.10.2-11.el6.x86_64                                    4/15 

  Installing : cloog-ppl-0.15.7-1.2.el6.x86_64                             5/15 

  Installing : kernel-uek-headers-2.6.32-300.32.1.el6uek.x86_64            6/15 

  Installing : glibc-headers-2.12-1.80.el6_3.4.x86_64                      7/15 

  Installing : glibc-devel-2.12-1.80.el6_3.4.x86_64                        8/15 

  Installing : gcc-4.4.6-4.el6.x86_64                                      9/15 

  Installing : gcc-c++-4.4.6-4.el6.x86_64                                 10/15 

  Installing : compat-libstdc++-33-3.2.3-69.el6.x86_64                    11/15 

  Installing : libaio-devel-0.3.107-10.el6.x86_64                         12/15 

  Installing : ksh-20100621-16.el6.x86_64                                 13/15 

  Installing : compat-libcap1-1.10-1.x86_64                               14/15 



  Installing : oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64      15/15 

  Verifying  : gcc-4.4.6-4.el6.x86_64                                      1/15

  Verifying  : compat-libcap1-1.10-1.x86_64                                2/15 

  Verifying  : ksh-20100621-16.el6.x86_64                                  3/15 

  Verifying  : glibc-devel-2.12-1.80.el6_3.4.x86_64                        4/15 

  Verifying  : libaio-devel-0.3.107-10.el6.x86_64                          5/15 

  Verifying  : oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64       6/15 

  Verifying  : gcc-c++-4.4.6-4.el6.x86_64                                  7/15 

  Verifying  : glibc-headers-2.12-1.80.el6_3.4.x86_64                      8/15 

  Verifying  : libstdc++-devel-4.4.6-4.el6.x86_64                          9/15 

  Verifying  : compat-libstdc++-33-3.2.3-69.el6.x86_64                    10/15 

  Verifying  : mpfr-2.4.1-6.el6.x86_64                                    11/15 

  Verifying  : kernel-uek-headers-2.6.32-300.32.1.el6uek.x86_64           12/15 

  Verifying  : cpp-4.4.6-4.el6.x86_64                                     13/15 

  Verifying  : ppl-0.10.2-11.el6.x86_64                                   14/15 

  Verifying  : cloog-ppl-0.15.7-1.2.el6.x86_64                            15/15 



Installed:

  oracle-rdbms-server-11gR2-preinstall.x86_64 0:1.0-6.el6                       



Dependency Installed:

  cloog-ppl.x86_64 0:0.15.7-1.2.el6                                             

  compat-libcap1.x86_64 0:1.10-1                                                

  compat-libstdc++-33.x86_64 0:3.2.3-69.el6                                     

  cpp.x86_64 0:4.4.6-4.el6                                                      

  gcc.x86_64 0:4.4.6-4.el6                                                      

  gcc-c++.x86_64 0:4.4.6-4.el6                                                  

  glibc-devel.x86_64 0:2.12-1.80.el6_3.4                                        

  glibc-headers.x86_64 0:2.12-1.80.el6_3.4                                      

  kernel-uek-headers.x86_64 0:2.6.32-300.32.1.el6uek                            

  ksh.x86_64 0:20100621-16.el6                                                  

  libaio-devel.x86_64 0:0.3.107-10.el6                                          

  libstdc++-devel.x86_64 0:4.4.6-4.el6                                          

  mpfr.x86_64 0:2.4.1-6.el6                                                     

  ppl.x86_64 0:0.10.2-11.el6                                                    



Complete!

    Listing 1: Installing the oracle-rdbms-server-11gR2-preinstall RPM

    The yum installation logs messages about kernel changes in the file /var/log/oracle-rdbms-server-11gR2-preinstall/results/orakernel.log, and it makes backups of current system settings in the directory /var/log/oracle-rdbms-server-11gR2-preinstall/backup.

  4. At this point, the system is ready for the installation of Oracle Database. For example, to install Oracle Database 11g Release 2, follow the directions in Chapter 4, "Installing Oracle Database," of the Database Installation Guide for Linux."
     

    Here are the steps I followed while installing Oracle Database 11g Release 2 in my test environment. Make sure you review all documentation and follow recommended best practices before installing into your production environment.

    1. As root, create a parent directory in a file system that has sufficient space to be the target location for the downloaded files:
        
      # mkdir /home/OraDB11g

# cd /home/OraDB11g
       

      The amount of disk space needed in the file system varies according to the specific installation type, but roughly twice the size of the zip archives, or 5 GB, is enough to house the software and data files.

    2. Into this target directory, download the installation media files from the Oracle Database Software Downloads page on Oracle Technology Network.
    3. Extract the files:
        
      # unzip linux.x64_11gR2_database_1of2.zip

# unzip linux.x64_11gR2_database_2of2.zip
    4. Log in as the user oracle. Change directory to the database directory and enter the following command to run the Oracle Universal Installer:
        
      $ cd /home/OraDB11g/database

$ ./runInstaller

    The Oracle Universal Installer performs a number of checks, verifying that the necessary OS packages and versions are installed. In addition, it checks kernel parameters set by the oracle-rdbms-server-11gR2-preinstall installation. During the kernel settings check, the installer might flag a few settings as "failed," and you should investigate these failures. In some cases, you still might be able to continue with the database installation. If you check kernel settings in /etc/sysctl.conf, you''ll see that oracle-rdbms-server-11gR2-preinstall has modified and added the necessary settings to ensure the minimum requirements are met, as defined in section 2.10.1, "Displaying and Changing Kernel Parameter Values," in Chapter 2, "Oracle Database Preinstallation Requirements," of the Oracle Database Installation Guide 11g Release2 (11.2) for Linux. Below is the list of requirements:

    fs.aio-max-nr = 1048576

fs.file-max = 6815744

kernel.shmall = 2097152

kernel.shmmax = 4294967295

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

net.ipv4.ip_local_port_range = 9000 65500

net.core.rmem_default = 262144

net.core.rmem_max = 4194304

net.core.wmem_default = 262144

net.core.wmem_max = 1048576
     

    If necessary, you can (as root) edit the file /etc/sysctl.conf to specify a setting manually, for example:

    # vi /etc/sysctl.conf 

# /sbin/sysctl -p
     

    The Oracle Universal Installer performs additional checks, such as verifying the glibc version, sufficient disk space, environmental variable and path settings, and sufficient physical memory and swap space. Generally, installing oracle-rdbms-server-11gR2-preinstall takes care of the prerequisites so that you can proceed directly with installing the database.

Final Thoughts

Installing the oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall RPMs can save time when installing Oracle Database 12c and 11g on Oracle Linux. These RPMs address most Oracle Database installation prerequisites and greatly simplify the installation process.

See Also

Here are the resources referenced earlier in this document:

  • Oracle Unbreakable Linux Network: https://linux.oracle.com
  • Oracle Linux yum server: http://yum.oracle.com/
  • Oracle software delivery cloud (requires registration or login): https://edelivery.oracle.com/linux
  • Chapter 4, "Installing Oracle Database," of the Database Installation Guide for Linux: http://docs.oracle.com/cd/E11882_01/install.112/e24321/inst_task.htm#BABBBHJH
  • Oracle Database Software Downloads page on Oracle Technology Network: http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html

And here are some additional resources from the Oracle Database Documentation Library (http://www.oracle.com/pls/db112/homepage). Relevant subsections from the Oracle Database Installation Guide 11g Release 2 (11.2) for Linux (http://download.oracle.com/docs/cd/E11882_01/install.112/e16763/toc.htm) with currently valid URLs are as follows:

  • "About the Oracle RDBMS Pre-Install and Oracle Validated RPMs" from Chapter 1, "Overview of Oracle Database Installation": http://download.oracle.com/docs/cd/E11882_01/install.112/e16763/install_overview.htm#BABDBHCJ
  • Chapter 2, "Oracle Database Preinstallation Requirements": http://download.oracle.com/docs/cd/E11882_01/install.112/e16763/pre_install.htm#BABFDGHJ
  • "Downloading Oracle Software" from Chapter 4, "Installing Oracle Database," which describes how to download installation files from the Oracle Technology Network Website: http://docs.oracle.com/cd/E11882_01/install.112/e16763/inst_task.htm#autoId6

Also see the blog entry "Oracle RDBMS Server 11gR2 Pre-Install RPM for Oracle Linux 6 has been released": https://blogs.oracle.com/linux/entry/oracle_rdbms_server_11gr2_pre

About the Authors

Ginny Henningsen has worked for the last 15 years as a freelance writer developing technical collateral and documentation for high-tech companies. Prior to that, Ginny worked for Sun Microsystems, Inc. as a Systems Engineer in King of Prussia, PA and Milwaukee, WI. Ginny has a BA from Carnegie-Mellon University and a MSCS from Villanova University.

Michele Casey is the Director of Product Management for Oracle Linux. She has worked with commercial Linux distributions and open source projects as a product manager since 2006. She has also held positions as a system administrator, project manager, and technical support engineer.

Revision 1.1, 07/09/2013; added information about using the
oracle-rdbms-server-12cR1-preinstall package to install
Oracle Database 12c

 

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NodeJS-Oracle DB - NJS-040 连接超时，在 ICP 中使用带有 Lopback 的 oracle 驱动程序（loopback-connector-oracle）

NodeJS-Oracle DB - NJS-040 连接超时，在 ICP 中使用带有 Lopback 的 oracle 驱动程序（loopback-connector-oracle）

如何解决NodeJS-Oracle DB - NJS-040 连接超时，在 ICP 中使用带有 Lopback 的 oracle 驱动程序（loopback-connector-oracle）？

我正在使用 loopback-connector-oracle 4.1.1 版寻求有关我面临的问题的一些信息。分析如下： 我们有 DB 连接配置，可以使用 json 文件格式的 oracle 连接器使用属性连接到 oracle DB 数据源。 "maxConn": 20,“主机”：DB_HOST， “端口”：DB_PORT， “数据库”：DB_NAME， “密码”：DB_PASSWORD， “用户”：DB_USER， "connector": "oracle",

有两个进程/pod 正在运行，每个进程/pod 都有自己的池供oracle 连接器使用。发生的情况是，在一个实例中，oracle 能够连接并处理请求，但在第二个 pod/进程中，我注意到 njs-040 错误连接超时。由于两者都运行在同一个环境中，所以连接性不会成为问题。我正在寻求您的帮助或意见以了解连接池耗尽的原因？正如我所看到的，DB 上的连接/会话数量配置的数量较少。 当我重新启动 pod/进程时，一切都会恢复正常。在我的流程中遇到的一些问题，如果您可以指导并提供宝贵的意见，我正在寻求您的帮助。

  • 如果使用连接池（oracle 连接器），它也应该释放对象，耗尽的机会会减少吗？
  • 在进程/pod 启动并通过连接器 (oracle) 获取数据源中的连接对象后，发生网络问题并且进程和数据库之间的连接丢失，连接器是否恢复？根据我的观察，我在其他进程中注意到的似乎应该被恢复，当它与范围一起运行时，在一个进程中可能会导致什么？

我非常感谢您的回复。 提前致谢 桑吉夫

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）

Oracle 10g AND Oracle 11g手工建库案例--Oracle 11g

Oracle 10g AND Oracle 11g手工建库案例--Oracle 11g

Oracle 10g AND Oracle 11g手工建库案例--Oracle 11g

系统环境：

操作系统： RedHat EL6

Oracle： Oracle 10g and Oracle 11g

 

手工建库相对来说很容易实现，本案例是从10g和11g，通过手工建库的方式做一个简单的对比，可以看出11g和10g之间的一个简单的差异！

VMware+Linux+Oracle 10G RAC全程详细图解

案例二：

在Oracle 11g 环境下手工建库

DB_NAME=''test1''

INSTANCE_NAME=''test1''

1、建立Instance的初始化参数文件和口令文件

[oracle@rh6 dbs]$cat inittest1.ora

db_name=''test1''

memory_target=400m //Oracle 11g增加了内存自动管理

processes = 150

audit_file_dest=''$ORACLE_BASE/admin/test1/adump''

audit_trail =''db''

db_block_size=8192

db_domain=''''

open_cursors=300

remote_login_passwordfile=''EXCLUSIVE''

undo_tablespace=''UNDOTBS1''

# You may want to ensure that control files are created on separate physical

# devices

control_files = /u01/app/oracle/oradata/test1/control01.ctl

compatible =''11.2.0''

 

[oracle@rh6 dbs]$ orapwd file=orapwtest1 password=oracle entries=3

 

2、建立数据库相关的目录

Oracle 11g增加了diagnostic directory，，默认的为$ORACLE_BASE

[oracle@rh6 dbs]$ mkdir -p $ORACLE_BASE/admin/test1/adump

[oracle@rh6 dbs]$ mkdir -p /u01/app/oracle/oradata/test1

 

3、建立建库脚本

[oracle@rh6 ~]$ cat cr_db.sql

CREATE DATABASE test1

USER SYS IDENTIFIED BY oracle

USER SYSTEM IDENTIFIED BY oracle

LOGFILE

GROUP 1 (''/u01/app/oracle/oradata/test1/redo01a.log'') SIZE 50M ,

GROUP 2 (''/u01/app/oracle/oradata/test1/redo02a.log'') SIZE 50M

MAXLOGFILES 10

MAXLOGMEMBERS 5

MAXLOGHISTORY 1

MAXDATAFILES 200

CHARACTER SET zhs16gbk

DATAFILE ''/u01/app/oracle/oradata/test1/system01.dbf'' SIZE 325M REUSE

SYSAUX DATAFILE ''/u01/app/oracle/oradata/test1/sysaux01.dbf'' SIZE 325M REUSE

DEFAULT TEMPORARY TABLESPACE tempts1

TEMPFILE ''/u01/app/oracle/oradata/test1/temp01.dbf''

SIZE 100M REUSE

UNDO TABLESPACE undotbs1

DATAFILE ''/u01/app/oracle/oradata/test1/undotbs01.dbf''

SIZE 200M REUSE AUTOEXTEND ON MAXSIZE UNLIMITED;

 

4、启动Instance并建立数据库

[oracle@rh6 ~]$ export ORACLE_SID=test1

[oracle@rh6 ~]$ sqlplus ''/as sysdba''

SQL*Plus: Release 11.2.0.1.0 Production on Wed May 21 10:59:58 2014

Copyright (c) 1982, 2009, Oracle. All rights reserved.

Connected to an idle instance.

10:59:59 SYS@ test1>startup nomount;

ORACLE instance started.

Total System Global Area 417546240 bytes

Fixed Size 2213936 bytes

Variable Size 268437456 bytes

Database Buffers 142606336 bytes

Redo Buffers 4288512 bytes

11:00:12 SYS@ test1>@/home/oracle/cr_db

Database created.

Elapsed: 00:01:23.44

11:01:51 SYS@ test1>

 

建库告警日志：

CREATE TABLESPACE sysaux DATAFILE ''/u01/app/oracle/oradata/test1/sysaux01.dbf'' SIZE 325M REUSE

EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO ONLINE

Wed May 21 11:01:08 2014

Completed: CREATE TABLESPACE sysaux DATAFILE ''/u01/app/oracle/oradata/test1/sysaux01.dbf'' SIZE 325M REUSE

EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO ONLINE

processing ?/rdbms/admin/dplsql.bsq

processing ?/rdbms/admin/dtxnspc.bsq

CREATE UNDO TABLESPACE UNDOTBS1 DATAFILE ''/u01/app/oracle/oradata/test1/undotbs01.dbf''

SIZE 200M REUSE AUTOEXTEND ON MAXSIZE UNLIMITED

Wed May 21 11:01:23 2014

Successfully onlined Undo Tablespace 2.

Completed: CREATE UNDO TABLESPACE UNDOTBS1 DATAFILE ''/u01/app/oracle/oradata/test1/undotbs01.dbf''

SIZE 200M REUSE AUTOEXTEND ON MAXSIZE UNLIMITED

CREATE TEMPORARY TABLESPACE TEMPTS1 TEMPFILE ''/u01/app/oracle/oradata/test1/temp01.dbf''

SIZE 100M REUSE

Completed: CREATE TEMPORARY TABLESPACE TEMPTS1 TEMPFILE ''/u01/app/oracle/oradata/test1/temp01.dbf''

SIZE 100M REUSE

ALTER DATABASE DEFAULT TEMPORARY TABLESPACE TEMPTS1

Completed: ALTER DATABASE DEFAULT TEMPORARY TABLESPACE TEMPTS1

ALTER DATABASE DEFAULT TABLESPACE SYSTEM

Completed: ALTER DATABASE DEFAULT TABLESPACE SYSTEM

processing ?/rdbms/admin/dfmap.bsq

processing ?/rdbms/admin/denv.bsq

processing ?/rdbms/admin/drac.bsq

processing ?/rdbms/admin/dsec.bsq

processing ?/rdbms/admin/doptim.bsq

processing ?/rdbms/admin/dobj.bsq

processing ?/rdbms/admin/djava.bsq

processing ?/rdbms/admin/dpart.bsq

Wed May 21 11:01:34 2014

processing ?/rdbms/admin/drep.bsq

processing ?/rdbms/admin/daw.bsq

processing ?/rdbms/admin/dsummgt.bsq

processing ?/rdbms/admin/dtools.bsq

processing ?/rdbms/admin/dexttab.bsq

processing ?/rdbms/admin/ddm.bsq

processing ?/rdbms/admin/dlmnr.bsq

processing ?/rdbms/admin/ddst.bsq

Wed May 21 11:01:43 2014

SMON: enabling tx recovery

Starting background process SMCO

Wed May 21 11:01:44 2014

SMCO started with pid=17, OS id=2816

Wed May 21 11:01:50 2014

replication_dependency_tracking turned off (no async multimaster replication found)

Starting background process QMNC

Wed May 21 11:01:50 2014

QMNC started with pid=20, OS id=2826

Completed: CREATE DATABASE test1

USER SYS IDENTIFIED BY ****USER SYSTEM IDENTIFIED BY ****LOGFILE

GROUP 1 (''/u01/app/oracle/oradata/test1/redo01a.log'') SIZE 50M ,

GROUP 2 (''/u01/app/oracle/oradata/test1/redo02a.log'') SIZE 50M

MAXLOGFILES 10

MAXLOGMEMBERS 5

MAXLOGHISTORY 1

MAXDATAFILES 200

CHARACTER SET zhs16gbk

DATAFILE ''/u01/app/oracle/oradata/test1/system01.dbf'' SIZE 325M REUSE

SYSAUX DATAFILE ''/u01/app/oracle/oradata/test1/sysaux01.dbf'' SIZE 325M REUSE

DEFAULT TEMPORARY TABLESPACE tempts1

TEMPFILE ''/u01/app/oracle/oradata/test1/temp01.dbf''

SIZE 100M REUSE

UNDO TABLESPACE undotbs1

DATAFILE ''/u01/app/oracle/oradata/test1/undotbs01.dbf''

SIZE 200M REUSE AUTOEXTEND ON MAXSIZE UNLIMITED

 

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