Oracle在19年2月13日发不了Oracle  19c的exadata版本，可以在Linux平台进行测试。

下载地址：https://edelivery.oracle.com/

首先在mos上查看19c的认证系统，19c相当于Oracle 12.2.0.3，是Oracle 12的终极版本。目前查看认证只是在Oracle  Linux 7上，本次测试环境为RHEL 7.5

安装环境：

RHEL 7.5 x86_64

Oracle 19c

安装过程：

涉及安装目录及参数调整：

##创建目录

mkdir -p /oracle/product/12.2/db

##创建用户

groupadd -g 1200 oinstall

groupadd -g 1201 dba

groupadd -g 1202 oper

groupadd -g 1203 backupdba

groupadd -g 1204 dgdba

groupadd -g 1205 kmdba

useradd -m -d /home/oracle -u 1101 -g oinstall -G dba,oper,backupdba,dgdba,kmdba oracle

chown -R oracle:oinstall /oracle

echo 'oracle' | passwd oracle --stdin

##关闭防火墙

sed -i  "s/SELINUX=enforcing/SELINUX=disabled/"  /etc/selinux/config

systemctl  stop firewalld

systemctl disable firewalld

##配置内核参数

#kernel.shmmax = 内存/2*1024*1024*1024   3G

#kernel.shmall = shmmax/4096

cat <> /etc/sysctl.conf

fs.file-max = 6815744

kernel.sem = 250 32000 100 128

kernel.shmmni = 4096

kernel.shmall = 786048

kernel.shmmax = 3221225472

kernel.panic_on_oops = 1

net.core.rmem_default = 262144

net.core.rmem_max = 4194304

net.core.wmem_default = 262144

net.core.wmem_max = 1048576

net.ipv4.ip_local_port_range = 32768 61000

fs.aio-max-nr = 3145728

#vm.nr_hugepages = 92200

vm.vfs_cache_pressure=200

vm.swappiness=10

vm.min_free_kbytes=524288

vm.dirty_ratio = 5

vm.dirty_background_ratio=5

vm.dirty_writeback_centisecs=100

vm.dirty_expire_centisecs=100

vm.drop_caches=3

vm.overcommit_memory=2

kernel.panic = 10

kernel.sysrq=1

eof

sysctl -p

cat <> /etc/security/limits.conf

oracle soft nproc 2047

oracle hard nproc 16384

oracle soft nofile 1024

oracle hard nofile 65536

oracle soft stack 10240

oracle hard stack 32768

oracle  hard  memlock  3145728

oracle  soft  memlock  3145728

eof

echo "session required pam_limits.so" >> /etc/pam.d/login

##禁用THP

###关闭THP

# cat /sys/kernel/mm/transparent_hugepage/enabled

#[always] madvise never  <

sed -i 's#GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet"#GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=rhel/root r

d.lvm.lv=rhel/swap rhgb quiet transparent_hugepage=never"#' /etc/default/grub

grub2-mkconfig -o /boot/grub2/grub.cfg

###禁用avahi-daemon

##systemctl stop avahi-daemon

##systemctl disable avahi-daemon

##systemctl status avahi-daemon

####设置RemoveIPC=false

echo "RemoveIPC=no" >> /etc/systemd/logind.conf

#重启systemd-logind服务或重启主机

# systemctl daemon-reload

# systemctl restart systemd-logind

###参考：ALERT: Setting RemoveIPC=yes on Redhat 7.2 Crashes ASM and Database Instances as Well as Any Application That Uses a Shared Memory Segment (SHM) or

Semaphores (SEM) (文档 ID 2081410.1)

###如果后续OS升级后，也需要检查这个参数，以避免相关问题

cat <> /etc/profile

if [ \$USER = "oracle" ]; then

if [ \$SHELL = "/bin/ksh" ]; then

ulimit -p 16384

ulimit -n 65536

else

ulimit -u 16384 -n 65536

fi

fi

eof

##调整存储：红帽7默认deadline不需要调整

###[root@rhdb01 rpm]# more /sys/block/sdb/queue/scheduler

###noop deadline [cfq]

##echo deadline > /sys/block/sdb/queue/scheduler

##配置oracle环境变量

cat <> /home/oracle/.bash_profile

export ORACLE_BASE=/oracle/product

export ORACLE_HOME=/oracle/product/19/db

export PATH=\$PATH:\$ORACLE_HOME/bin:\$ORACLE_HOME/OPatch

export ORACLE_SID=rh19c

eof

安装数据库所需软件包：

通过yum可以访问系统ISO，安装方式如下：

yum -y install compat-libcap1.x86_64 compat-libstdc++-33.x86_64 ksh.x86_64  libaio-devel.x86_64  gcc-c++.x86_64 libstdc++-devel.x86_64 smartmontools.x86_64 sysstat.x86_64 xorg-x11-utils-7.5-22.el7.x86_64

除此以为需要下载compat-libstdc++-33软件包，否则在使用Oracle Text时容易出现问题。

下载地址：https://access.redhat.com/downloads/content/compat-libstdc++-33/3.2.3-72.el7/x86_64/fd431d51/package

Oracle从18c开始database软件直接解压到ORACLE_HOME目录下

解压文件：

unzip V981623-01.zip -d /oracle/product/19/db/

开始安装：

export DISPLAY=192.168.15.125:0.0

./runInstaller

选择只安装软件：

由于虚拟机配置内存较小，shmall参数告警可忽略。

安装compat软件：

rpm -ivh compat-libstdc++-33-3.2.3-72.el7.x86_64.rpm

安装完成后，使用root用户执行两个脚本:

/oracle/oraInventory/orainstRoot.sh

/oracle/product/19/db/root.sh

通过netca创建监听，和以往11g界面一致。

通过dbca创建数据库：

选择指定的字符集：

数据库参数调整如下，具体情况需根据实际情况进行调整：

alter system set db_file_multiblock_read_count=32 scope=spfile sid='*';

alter system set max_dump_file_size = '500M' scope=spfile sid='*';

alter system set "_memory_imm_mode_without_autosga"=FALSE scope=spfile sid='*';

alter system set job_queue_processes=100 scope=spfile sid='*';

alter system set DB_FILES=4096 scope=spfile sid='*';

alter system set nls_date_format='YYYY-MM-DD HH24:MI:SS' scope=spfile sid='*';

alter system set open_cursors=3000 scope=spfile sid='*';

alter system set open_links_per_instance=48 scope=spfile sid='*';

alter system set open_links=100 scope=spfile sid='*';

alter system set parallel_max_servers=20 scope=spfile sid='*';

alter system set session_cached_cursors=200 scope=spfile sid='*';

alter system set undo_retention=10800 scope=spfile sid='*';

alter system set "_undo_autotune"=false scope=spfile sid='*';

alter system set "_partition_large_extents"=false scope=spfile sid='*';

alter system set "_use_adaptive_log_file_sync"=false scope=spfile sid='*';

alter system set "_optimizer_use_feedback"=false scope=spfile sid='*';

alter system set deferred_segment_creation=false scope=spfile sid='*';

alter system set "_external_scn_logging_threshold_seconds"=600 scope=spfile sid='*';

alter system set "_external_scn_rejection_threshold_hours"=24 scope=spfile sid='*';

alter system set result_cache_max_size=0 scope=spfile sid='*';

alter system set "_cleanup_rollback_entries"=2000 scope=spfile sid='*';

alter system set parallel_force_local=true scope=spfile sid='*';   --rac

alter system set "_gc_policy_time"=0 scope=spfile sid='*';

alter system set "_clusterwide_global_transactions"=false scope=spfile sid='*';

alter system set "_library_cache_advice"=false scope=both sid='*';

alter system set db_cache_advice=off scope=both sid='*';

alter system set filesystemio_options=setall scope=spfile sid='*';

alter system set fast_start_mttr_target=300 scope=spfile sid='*';

alter profile default limit PASSWORD_LIFE_TIME   UNLIMITED;

alter profile  ORA_STIG_PROFILE limit  PASSWORD_LIFE_TIME   UNLIMITED;

begin

DBMS_AUTO_TASK_ADMIN.DISABLE(

client_name => 'sql tuning advisor',

operation => NULL,

window_name => NULL);

end;

/

begin

DBMS_AUTO_TASK_ADMIN.DISABLE(

client_name => 'auto space advisor',

operation => NULL,

window_name => NULL);

end;

/

重启数据库后完成安装。