在RockyLinux 9.3环境中采用RPM模式部署Oracle 19C
用途
在开发数据库系统时，可以验证功能是否与Oracle的表现一致，验证正确性和兼容性
限制
- 虚拟机安装，CPU 2*4 内存16G 磁盘100G
- 目标生产环境是RHEL 9.X，学习环境采用Rocky Linux 9.3
- 选择Oracle版本是长期支持版19C
- 只验证基础的功能，可以禁用CDB PDB
- 安装的Oracle只需要功能验证不用于生产环境，也不进行性能测试
查找资料
- bing上查找资料，一般找到的安装Oracle的资料是CentOS 7.x,8.x，而9.x的比较少，找到：
- 基于RHEL9,ORACLE LINUX 9安装Oracle 19c 数据库
可惜文中表示安装Oracle时需要安装库补丁，流程还是比较麻烦 - linux安装oracle19c完整版(图形+静默安装) 系统参数都是手工设置和通过界面设置，可以参考
- 基于RHEL9,ORACLE LINUX 9安装Oracle 19c 数据库
- 直接查找官方文档
- Oracle Database Installation Guide 19c for Linux
发现最新的19C没有要求安装补丁，并且支持RPM方式安装，过程非常简洁，尝试成功后总结，供大家参考。
- Oracle Database Installation Guide 19c for Linux
准备环境
安装虚拟机的过程不再赘述，安装后需要做的准备工作如下：
- 关闭防火墙
#检查防火墙状态 systemctl status firewalld.service #关闭防火墙 systemctl stop firewalld.service #禁止开机启动防火墙 systemctl disable firewalld.service - 关闭SELINUX
vi /etc/selinux/config 编辑内容：
#SELINUX=enforcing #注释掉 SELINUX=disabled #增加 存盘退出，下次重新启动后生效。如果想使配置立即生效，执行：
setenforce 0 - 配置域名
采用修改/etc/hostname的方式，重启后生效
vi /etc/hostname oracle19c.learning.cn - 配置域名解析
vi /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.154.19 oracle19c oracle19c.learning.cn - 配置软件源
事先将rocky linux 9.3的ISO mount到/mnt/rocky9/
vi /etc/yum.repos.d/rocky.repo [baseos] name=Rocky Linux $releasever - BaseOS baseurl=file:///mnt/rocky9/BaseOS/ gpgcheck=1 enabled=1 countme=1 metadata_expire=6h gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-9 [appstream] name=Rocky Linux $releasever - AppStream baseurl=file:///mnt/rocky9/AppStream/ gpgcheck=1 enabled=1 countme=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-9 - 准备Oracle RPM
- 预安装RPM：
访问Oracle Linux 9的软件源，如x86对应的是: https://yum.oracle.com/repo/OracleLinux/OL9/appstream/x86_64/，
找到对应Oracle 19c的预安装版本，如 oracle-database-preinstall-19c-1.0-1.el9.x86_64.rpm，下载该预安装rpm - Oracle 19C:
访问 Oracle下载页 找到最新的19C版本，如
oracle-database-ee-19c-1.0-1.x86_64.rpm,然后下载到本地
- Linux共享Windows目录
为了节省Linux的磁盘空间，直接在Linux中访问Windows下载的rpm
- 在Windows中共享保存rpm的文件夹，如名称为//192.168.154.1/Oracle
- 在Linux中链接Windows的共享
mkdir -p /mnt/oracle mount -t cifs -o username=xxxx,password=yyyy //192.168.154.1/Oracle /mnt/oracle 请把"xxxx","yyyy"换成实际的用户名和密码
部署Oracle预安装RPM包
按官方文档，安装 Preinstallation RPM时会：
- 解析Oracle Grid Infrastructure和Oracle Database所需的依赖项,并自动下载和安装对应的RPM包
- 创建oracle用户，将其加入新创建的oraInventory (oinstall)和 OSDBA (dba)组中
- 按Oracle数据库预安装RPM程序的建议设置sysctl.conf、系统启动参数和驱动程序参数
- 设置硬和软资源限制 Linux进程资源访问限制
- 根据内核版本设置其他推荐参数
- 在Linux x86_64和Linux aarch64机器的内核中设置numa=off
dnf install -y /mnt/oracle/19c/oracle-database-preinstall-19c-1.0-1.el9.x86_64.rpm Last metadata expiration check: 0:01:14 ago on Wed 17 Apr 2024 12:02:20 PM CST. Dependencies resolved. ====================================================================================================== Package Architecture Version Repository Size ====================================================================================================== Installing: oracle-database-preinstall-19c x86_64 1.0-1.el9 @commandline 33 k Installing dependencies: chkconfig x86_64 1.24-1.el9 baseos 161 k gssproxy x86_64 0.8.4-6.el9 baseos 108 k initscripts x86_64 10.11.5-1.el9 baseos 210 k keyutils x86_64 1.6.3-1.el9 baseos 72 k ksh x86_64 3:1.0.0~beta.1-3.el9 appstream 879 k libXxf86dga x86_64 1.1.5-8.el9 appstream 20 k libaio-devel x86_64 0.3.111-13.el9 appstream 10 k libdmx x86_64 1.1.4-12.el9 appstream 16 k libev x86_64 4.33-5.el9 baseos 52 k libnfsidmap x86_64 1:2.5.4-20.el9 baseos 60 k libnsl x86_64 2.34-83.el9.7 baseos 77 k libverto-libev x86_64 0.3.2-3.el9 baseos 13 k nfs-utils x86_64 1:2.5.4-20.el9 baseos 425 k rpcbind x86_64 1.2.6-5.el9 baseos 56 k sssd-nfs-idmap x86_64 2.9.1-4.el9_3 baseos 42 k xorg-x11-utils x86_64 7.5-40.el9 appstream 106 k xorg-x11-xauth x86_64 1:1.1-10.el9 appstream 36 k Transaction Summary ====================================================================================================== Install 18 Packages Total size: 2.3 M Installed size: 7.5 M Downloading Packages: Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : libnfsidmap-1:2.5.4-20.el9.x86_64 1/18 Installing : ksh-3:1.0.0~beta.1-3.el9.x86_64 2/18 Running scriptlet: ksh-3:1.0.0~beta.1-3.el9.x86_64 2/18 Installing : libdmx-1.1.4-12.el9.x86_64 3/18 Installing : libXxf86dga-1.1.5-8.el9.x86_64 4/18 Installing : xorg-x11-utils-7.5-40.el9.x86_64 5/18 Installing : xorg-x11-xauth-1:1.1-10.el9.x86_64 6/18 Installing : libaio-devel-0.3.111-13.el9.x86_64 7/18 Installing : libnsl-2.34-83.el9.7.x86_64 8/18 Installing : keyutils-1.6.3-1.el9.x86_64 9/18 Installing : libev-4.33-5.el9.x86_64 10/18 Installing : libverto-libev-0.3.2-3.el9.x86_64 11/18 Installing : gssproxy-0.8.4-6.el9.x86_64 12/18 Running scriptlet: gssproxy-0.8.4-6.el9.x86_64 12/18 Running scriptlet: rpcbind-1.2.6-5.el9.x86_64 13/18 Installing : rpcbind-1.2.6-5.el9.x86_64 13/18 Running scriptlet: rpcbind-1.2.6-5.el9.x86_64 13/18 Created symlink /etc/systemd/system/multi-user.target.wants/rpcbind.service → /usr/lib/systemd/system/rpcbind.service. Created symlink /etc/systemd/system/sockets.target.wants/rpcbind.socket → /usr/lib/systemd/system/rpcbind.socket. Running scriptlet: nfs-utils-1:2.5.4-20.el9.x86_64 14/18 Installing : nfs-utils-1:2.5.4-20.el9.x86_64 14/18 Running scriptlet: nfs-utils-1:2.5.4-20.el9.x86_64 14/18 Installing : chkconfig-1.24-1.el9.x86_64 15/18 Installing : initscripts-10.11.5-1.el9.x86_64 16/18 Running scriptlet: initscripts-10.11.5-1.el9.x86_64 16/18 Created symlink /etc/systemd/system/sysinit.target.wants/import-state.service → /usr/lib/systemd/system/import-state.service. Created symlink /etc/systemd/system/sysinit.target.wants/loadmodules.service → /usr/lib/systemd/system/loadmodules.service. Running scriptlet: oracle-database-preinstall-19c-1.0-1.el9.x86_64 17/18 Installing : oracle-database-preinstall-19c-1.0-1.el9.x86_64 17/18 Installing : sssd-nfs-idmap-2.9.1-4.el9_3.x86_64 18/18 Running scriptlet: oracle-database-preinstall-19c-1.0-1.el9.x86_64 18/18 Running scriptlet: sssd-nfs-idmap-2.9.1-4.el9_3.x86_64 18/18 Verifying : chkconfig-1.24-1.el9.x86_64 1/18 Verifying : libverto-libev-0.3.2-3.el9.x86_64 2/18 Verifying : initscripts-10.11.5-1.el9.x86_64 3/18 Verifying : rpcbind-1.2.6-5.el9.x86_64 4/18 Verifying : libev-4.33-5.el9.x86_64 5/18 Verifying : sssd-nfs-idmap-2.9.1-4.el9_3.x86_64 6/18 Verifying : gssproxy-0.8.4-6.el9.x86_64 7/18 Verifying : nfs-utils-1:2.5.4-20.el9.x86_64 8/18 Verifying : libnfsidmap-1:2.5.4-20.el9.x86_64 9/18 Verifying : keyutils-1.6.3-1.el9.x86_64 10/18 Verifying : libnsl-2.34-83.el9.7.x86_64 11/18 Verifying : libaio-devel-0.3.111-13.el9.x86_64 12/18 Verifying : xorg-x11-xauth-1:1.1-10.el9.x86_64 13/18 Verifying : xorg-x11-utils-7.5-40.el9.x86_64 14/18 Verifying : libXxf86dga-1.1.5-8.el9.x86_64 15/18 Verifying : libdmx-1.1.4-12.el9.x86_64 16/18 Verifying : ksh-3:1.0.0~beta.1-3.el9.x86_64 17/18 Verifying : oracle-database-preinstall-19c-1.0-1.el9.x86_64 18/18 Installed: chkconfig-1.24-1.el9.x86_64 gssproxy-0.8.4-6.el9.x86_64 initscripts-10.11.5-1.el9.x86_64 keyutils-1.6.3-1.el9.x86_64 ksh-3:1.0.0~beta.1-3.el9.x86_64 libXxf86dga-1.1.5-8.el9.x86_64 libaio-devel-0.3.111-13.el9.x86_64 libdmx-1.1.4-12.el9.x86_64 libev-4.33-5.el9.x86_64 libnfsidmap-1:2.5.4-20.el9.x86_64 libnsl-2.34-83.el9.7.x86_64 libverto-libev-0.3.2-3.el9.x86_64 nfs-utils-1:2.5.4-20.el9.x86_64 oracle-database-preinstall-19c-1.0-1.el9.x86_64 rpcbind-1.2.6-5.el9.x86_64 sssd-nfs-idmap-2.9.1-4.el9_3.x86_64 xorg-x11-utils-7.5-40.el9.x86_64 xorg-x11-xauth-1:1.1-10.el9.x86_64 Complete! 注意：安装完成后重新启动系统，确认所有的系统参数已经应用
验证预安装RPM的工作成果（不是强迫症无需关注这一部分）
- 检查依赖项，执行命令
dnf repoquery --requires oracle-database-preinstall-19c-1.0-1.el9.x86_64.rpm /bin/sh /etc/redhat-release /usr/bin/bash bc bind-utils binutils ethtool glibc glibc-devel initscripts ksh libaio libaio-devel libgcc libnsl libstdc++ libstdc++-devel make module-init-tools net-tools nfs-utils openssh-clients pam policycoreutils policycoreutils-python-utils procps psmisc smartmontools sysstat tar unzip util-linux-ng xorg-x11-utils xorg-x11-xauth 显示所有的依赖项，说明在部署预安装RPM过程中，检查3个文件和31个rpm的依赖关系
- 检查系统配置/etc/sysctl.conf 增加了内容
cat /etc/sysctl.conf # oracle-database-preinstall-19c setting for fs.file-max is 6815744 fs.file-max = 6815744 # oracle-database-preinstall-19c setting for kernel.sem is '250 32000 100 128' kernel.sem = 250 32000 100 128 # oracle-database-preinstall-19c setting for kernel.shmmni is 4096 kernel.shmmni = 4096 # oracle-database-preinstall-19c setting for kernel.shmall is 1073741824 on x86_64 kernel.shmall = 1073741824 # oracle-database-preinstall-19c setting for kernel.shmmax is 4398046511104 on x86_64 kernel.shmmax = 4398046511104 # oracle-database-preinstall-19c setting for kernel.panic_on_oops is 1 per Orabug 19212317 kernel.panic_on_oops = 1 # oracle-database-preinstall-19c setting for net.core.rmem_default is 262144 net.core.rmem_default = 262144 # oracle-database-preinstall-19c setting for net.core.rmem_max is 4194304 net.core.rmem_max = 4194304 # oracle-database-preinstall-19c setting for net.core.wmem_default is 262144 net.core.wmem_default = 262144 # oracle-database-preinstall-19c setting for net.core.wmem_max is 1048576 net.core.wmem_max = 1048576 # oracle-database-preinstall-19c setting for net.ipv4.conf.all.rp_filter is 2 net.ipv4.conf.all.rp_filter = 2 # oracle-database-preinstall-19c setting for net.ipv4.conf.default.rp_filter is 2 net.ipv4.conf.default.rp_filter = 2 # oracle-database-preinstall-19c setting for fs.aio-max-nr is 1048576 fs.aio-max-nr = 1048576 # oracle-database-preinstall-19c setting for net.ipv4.ip_local_port_range is 9000 65500 net.ipv4.ip_local_port_range = 9000 65500 注: 原文件备份在/etc/sysctl.d/99-initial-sysctl.conf
- 检查系统配置/etc/sysconfig/network 增加了内容
cat /etc/sysconfig/network # Created by anaconda # oracle-database-preinstall-19c : Add NOZEROCONF=yes NOZEROCONF=yes - 检查进程资源配置
cat /etc/security/limits.d/oracle-database-preinstall-19c.conf # oracle-database-preinstall-19c setting for nofile soft limit is 1024 oracle soft nofile 1024 # oracle-database-preinstall-19c setting for nofile hard limit is 65536 oracle hard nofile 65536 # oracle-database-preinstall-19c setting for nproc soft limit is 16384 # refer orabug15971421 for more info. oracle soft nproc 16384 # oracle-database-preinstall-19c setting for nproc hard limit is 16384 oracle hard nproc 16384 # oracle-database-preinstall-19c setting for stack soft limit is 10240KB oracle soft stack 10240 # oracle-database-preinstall-19c setting for stack hard limit is 32768KB oracle hard stack 32768 # oracle-database-preinstall-19c setting for memlock hard limit is maximum of 128GB on x86_64 or 3GB on x86 OR 90 % of RAM oracle hard memlock 134217728 # oracle-database-preinstall-19c setting for memlock soft limit is maximum of 128GB on x86_64 or 3GB on x86 OR 90% of RAM oracle soft memlock 134217728 # oracle-database-preinstall-19c setting for data soft limit is 'unlimited' oracle soft data unlimited # oracle-database-preinstall-19c setting for data hard limit is 'unlimited' oracle hard data unlimited - 检查进启动配置的变化
diff /boot/grub2/grub.cfg /boot/grub2/grub.cfg-oracle-database-preinstall-19c.orabackup 设置“numa=off transparent_hugepage=never”关闭了透明大页和numa < set kernelopts="root=/dev/mapper/rl-root ro crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M resume=/dev/mapper/rl-swap rd.lvm.lv=rl/root rd.lvm.lv=rl/swap rhgb quiet numa=off transparent_hugepage=never " --- > set kernelopts="root=/dev/mapper/rl-root ro crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M resume=/dev/mapper/rl-swap rd.lvm.lv=rl/root rd.lvm.lv=rl/swap rhgb quiet " 注意：修改了内核参数，需要重新启动
- 验证创建用户和用户组
groups oracle oracle : oinstall dba oper backupdba dgdba kmdba racdba id oracle uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54323(oper),54324(backupdba),54325(dgdba),54326(kmdba),54330(racdba) 从结果可见oracle属于7个组
- 验证透明大页是否关闭
cat /sys/kernel/mm/transparent_hugepage/enabled always madvise [never] cat /sys/kernel/mm/transparent_hugepage/defrag always defer defer+madvise [madvise] never - 也可以查看安装日志
cat /var/log/oracle-database-preinstall-19c/results/orakernel.log 安装Oracle RPM
dnf install -y /mnt/oracle/19c/oracle-database-ee-19c-1.0-1.x86_64.rpm Last metadata expiration check: 0:04:44 ago on Wed 17 Apr 2024 12:02:20 PM CST. Dependencies resolved. ========================================================================================================== Package Architecture Version Repository Size ========================================================================================================== Installing: oracle-database-ee-19c x86_64 1.0-1 @commandline 2.5 G Transaction Summary ========================================================================================================== Install 1 Package Total size: 2.5 G Installed size: 6.9 G Downloading Packages: Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Running scriptlet: oracle-database-ee-19c-1.0-1.x86_64 1/1 Installing : oracle-database-ee-19c-1.0-1.x86_64 1/1 Running scriptlet: oracle-database-ee-19c-1.0-1.x86_64 1/1 [INFO] Executing post installation scripts... [INFO] Oracle home installed successfully and ready to be configured. To configure a sample Oracle Database you can execute the following service configuration script as root: /etc/init.d/oracledb_ORCLCDB-19c configure Verifying : oracle-database-ee-19c-1.0-1.x86_64 1/1 Installed: oracle-database-ee-19c-1.0-1.x86_64 Complete! 禁用CDB
vi /etc/init.d/oracledb_ORCLCDB-19c ... export ORACLE_HOME=/opt/oracle/product/19c/dbhome_1 export ORACLE_VERSION=19c export ORACLE_SID=ORCLCDB export TEMPLATE_NAME=General_Purpose.dbc export CHARSET=AL32UTF8 export PDB_NAME=ORCLPDB1 export LISTENER_NAME=LISTENER export NUMBER_OF_PDBS=1 export CREATE_AS_CDB=true 修改为 export CREATE_AS_CDB=false 初始化数据库
[root@oracle19c ansible]# /etc/init.d/oracledb_ORCLCDB-19c configure Configuring Oracle Database ORCLCDB. Prepare for db operation 10% complete Copying database files 40% complete Creating and starting Oracle instance 42% complete 46% complete 50% complete 54% complete 60% complete Completing Database Creation 66% complete 70% complete Executing Post Configuration Actions 100% complete Database creation complete. For details check the logfiles at: /opt/oracle/cfgtoollogs/dbca/ORCLCDB. Database Information: Global Database Name:ORCLCDB System Identifier(SID):ORCLCDB Look at the log file "/opt/oracle/cfgtoollogs/dbca/ORCLCDB/ORCLCDB.log" for further details. Database configuration completed successfully. The passwords were auto generated, you must change them by connecting to the database using 'sqlplus / as sysdba' as the oracle user. 可以查看详细一点儿的日志（输出了时间）
cat /opt/oracle/cfgtoollogs/dbca/ORCLCDB/ORCLCDB.log 本次初始化耗时6分钟，对比没有禁用CDB的一次实验，初始化耗时15分钟
修改oracle用户的环境变量
su - oracle vi .bashrc # 在原文件最后增加 umask 022 export TMP=/tmp export TMPDIR=$TMP export NLS_LANG=AMERICAN_AMERICA.AL32UTF8 export ORACLE_BASE=/opt/oracle export ORACLE_HOME=$ORACLE_BASE/product/19c/dbhome_1 export TNS_ADMIN=$ORACLE_HOME/network/admin export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib export ORACLE_SID=ORCLCDB export PATH=$ORACLE_HOME/bin:$PATH 小技巧：修改.bashrc 而不是.bash_profile的原因是可以支持非登录模式执行shell
验证基本功能
返回root重新以oracle用户执行
su - oracle [oracle@oracle19c ~]$ sqlplus / as sysdba SQL*Plus: Release 19.0.0.0.0 - Production on Thu Apr 18 17:23:03 2024 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 SQL> create table t1(a int primary key,b varchar(16)); Table created. SQL> insert into t1 values(100,'beijing'); 1 row created. SQL> insert into t1 values(200,'天津'); 1 row created. SQL> select * from t1 order by a desc; A B ---------- ---------------- 200 天津 100 beijing 重新启动系统后，发现服务不会自动重启，设置自动重启
采用RPM安装并没有设置自动重新启动Oracle的服务，运行 sqlplus / as sysdba 执行简单SQL报错，信息如下：
[oracle@oracle19c ~]$ sqlplus / as sysdba SQL*Plus: Release 19.0.0.0.0 - Production on Thu Apr 18 22:59:25 2024 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to an idle instance. SQL> select * from t1 ; select * from t1 * ERROR at line 1: ORA-01034: ORACLE not available Process ID: 0 Session ID: 0 Serial number: 0 所以要手工增加自动重启的服务，此处主要参考ORACLE 19C 在centos 7的本地rpm包安装及调试，个别地方稍作修正
- 设置公共环境变量文件
vi /etc/sysconfig/ORCLCDB.oracledb ORACLE_BASE=/opt/oracle ORACLE_HOME=/opt/oracle/product/19c/dbhome_1 ORACLE_SID=ORCLCDB - 创建监听服务
vi /usr/lib/systemd/system/ORCLCDB@lsnrctl.service [Unit] Description=Oracle Net Listener After=syslog.target network.target [Service] Type=forking EnvironmentFile=/etc/sysconfig/ORCLCDB.oracledb ExecStart=/opt/oracle/product/19c/dbhome_1/bin/lsnrctl start ExecStop=/opt/oracle/product/19c/dbhome_1/bin/lsnrctl stop User=oracle [Install] WantedBy=multi-user.target - 创建服务启动服务
vi /usr/lib/systemd/system/ORCLCDB@oracledb.service [Unit] Description=Oracle Database service After=syslog.target network.target lsnrctl.service [Service] Type=forking EnvironmentFile=/etc/sysconfig/ORCLCDB.oracledb ExecStart=/opt/oracle/product/19c/dbhome_1/bin/dbstart $ORACLE_HOME ExecStop=/opt/oracle/product/19c/dbhome_1/bin/dbshut $ORACLE_HOME User=oracle [Install] WantedBy=multi-user.target - 设置启动
vi /etc/oratab ... #ORCLCDB:/opt/oracle/product/19c/dbhome_1:N #将此处原来的N修改为Y ORCLCDB:/opt/oracle/product/19c/dbhome_1:Y -
激活服务
systemctl enable ORCLCDB@lsnrctl
systemctl enable ORCLCDB@oracledb -
小技巧，先不忙着启动系统，先手工启动服务进行验证
systemctl start ORCLCDB@lsnrctl systemctl start ORCLCDB@oracledb 如果有错误信息，则通过 systemctl status ORCLCDB@lsnrctl 分析问题
- 重启后检验服务状态
[root@oracle19c ansible]# netstat -tunlp | grep -E '1521|5500' tcp6 0 0 :::5500 :::* LISTEN 1090/tnslsnr tcp6 0 0 :::1521 :::* LISTEN 1090/tnslsnr [root@oracle19c ansible]# su - oracle [oracle@oracle19c ~]$ sqlplus / as sysdba SQL*Plus: Release 19.0.0.0.0 - Production on Thu Apr 18 23:21:52 2024 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 SQL> select * from t2 ; A B ---------- ---------------- 100 beijing 200 天津 总结
本文的内容主要来自网络，但是经过了本人多次的验证和整理，剔除了一些不必要的环节，也为大家跳过了一些坑。如果有不足之处，请不吝指正，我一定及时修改更新。
1、RPM安装的限制
- 仅用于安装 Oracle 数据库软件，RAC不能这样安装，并且扣除preinstallation，安装rpm的难度与静默安装相当。
- RPM 只能用于安装软件，而不能用于更新软件
- 无法控制软件安装的目录，即不一定能满足企业安装规范的目录约束
- 推荐仅用于实验环境，不要用于生产环境
2、一些坑（网上个别文档有些笔误）
- 19C 缺省在/etc/init.d/oracledb_ORCLCDB-19c 设置了字符集为AL32UTF8，无需在其他地方设置服务器字符集
- /etc/hosts 一定要设置正确，但是无需删除127.0.0.1，::1 那两行
- 预安装RPM准备的内容见“验证预安装RPM的工作成果”部分，这些工作都不需要手工执行
- 仅仅功能验证的话不要启动CDB，否则连创建一个普通用户都要好几步操作
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