Oracle® Database

5.1.1 Operating System Requirements for Linux Containers

Linux Container version lxc-1.0.7-2.0.10 is supported on Oracle Linux 7 and Oracle Linux 6. Ensure that you have the following minimum kernel version installed on your system:

5.1.2 Patch Requirements

You must install patch 20920711 prior to enabling RT for Linux Containers.

5.1.3 Enabling Real-Time Processes for Linux Containers

To enable Real-Time (RT) processes on Linux Containers before you start an Oracle Grid Infrastructure installation, create the container with the RT option for Oracle Real Application Clusters (Oracle RAC) and Oracle Clusterware support:

lxc-create -n node_name -t oracle -B [brtfs|ext4] --  --release=6.latest --privileged=rt 

For example:

lxc-create -n node3-lxc1 -t oracle -B btrfs --  --release=6.latest --privileged=rt

This command example creates one container named node3-lxc1, and uses the brtfs file system to host the container.

5.2.1 Hard Limit Value Error in the Prerequisite Screen During the Installation

During a 12.1.0.2 installation, a hard limit value error occurs in the prerequisite screen.

Workaround:

You must not fix the hard limit value using the Fix and Check Again button. Instead, manually add the hard limit value 65536 to the entry etc/security/limits.conf on the host, log out and log in again, and then proceed with the installation. This may help to overcome any issue when the user tries to connect to the Linux container.

Install_User_Name     hard    nofile          65536

This issue is tracked with Oracle bug 20683209.

5.2.2 Shared Memory File System Verification Fails on Linux Containers

During a 12.1.0.2 Grid installation, the /dev/shm entry is not found in the /etc/fstab file of a Linux Container and the verification for the shared memory file system fails.

Workaround:

Check that the correct shared memory file system mounts on the Linux Container host. Ensure that the /dev/shm mount area is of type tmpfs and is mounted with the following options:

• With rw and execute permissions set on it

• With noexec or nosuid not set on it

Use the following procedure to check the shared memory file system:

1. Check the current mount settings on the Linux Container host. For example:

   $ more /etc/fstab |grep "tmpfs"
   tmpfs         /dev/shm       tmpfs     defaults     0 0
   
   

   Here is another example:

   $ df -h /dev/shm
   Filesystem      Size  Used Avail Use% Mounted on
   tmpfs            29G  228K   29G   1% /dev/shm
   

2. If necessary, change the mount settings on the Linux Container host. For example, log in as root, open the /etc/fstab file with a text editor, and modify the tmpfs line:

   tmpfs     /dev/shm     tmpfs     rw,exec      0 0
   

This issue is tracked with Oracle bug 22116467.

5.2.3 Kernel Warnings in the Prerequisite Check Screen During the Installation

During a 12.1.0.2 installation, kernel warnings appear in the prerequisite check screen due to missing /proc parameter files in the Linux container.

Workaround:

Add the missing /proc parameter files and set the recommended values in the host and proceed with the installation. The following /proc parameter files may only be set on the host and not for individual containers:

/proc/sys/fs/aio-max-nr
/proc/sys/net/core/rmem_default
/proc/sys/net/core/rmem_max
/proc/sys/net/core/wmem_default
/proc/sys/net/core/wmem_max
/proc/sys/net/ipv4/ip_local_port_range

Setting the values on the host according to Oracle recommended values automatically sets these values for all the Linux containers as well.

This issue is tracked with Oracle bug 20683257.

5.3.1 The oclumon dumpnodeview Displays Negative Value for IFree Field

In the Linux Containers environment, the inode value is not exported. As a result, the oclumon dumpnodeview command displays a negative value for the IFree (number of free inodes) field in its output.

Workaround:

None

This issue is tracked with Oracle bug 21150692.

5.3.2 DBCA Displays Incorrect Memory of the Host Server

When creating a database on Linux Container, Database Configuration Assistant (DBCA) incorrectly shows the available memory of the host server instead of the Linux Container on the Specify Configuration Options page. When you choose to allocate the percentage of memory based on the value shown, the database creation may fail in the case where total consumable memory for that Linux Container is less than the allocated memory.

Workaround:

You must allocate physical memory for the database according to the configuration of the Linux Container system.

This issue is tracked with Oracle bug 21546793.

5.3.3 12.1.0.2 Oracle Restart Deinstallation Issue with the CRSDECONFIG Plugin on Oracle Linux 7 Container

After successful deinstallation of 12.1.0.2 Oracle Restart, some of the files and directories are not removed.

Workaround:

After deinstalling 12.1.0.2 Oracle Restart, remove the following files and directories:

rm -r Oracle_Restart_Home
rm -r /OPT/ORCLFMAP
rm -r /etc/init.d/ohasd
rm -r /etc/init.d/ init.ohasd
rm -r /etc/systemd/system/oracle-ohasd.service

This issue is tracked with Oracle bug 20566514.

5.3.4 DBCA Unable to Identify File System Paths

When creating a database on Linux Containers, Database Configuration Assistant (DBCA) cannot identify the host owned file system paths in a Linux Container environment. This results in an error on the Storage Locations screen.

Workaround:

The storage location for the data file and flash recovery area must be owned by the Linux Container file system.

This issue is tracked with Oracle bugs 21890441 and 22011207.

7.1.1 Oracle Configuration Manager Support for SUSE Linux Enterprise Server 11

You must install the following packages to use Oracle Configuration Manager on SUSE 11:

glibc-devel-32bit-2.11.1-0.17.4
libgcc43-32bit-4.3.4_20091019-0.7.35
gcc-32bit-4.3-62.198
glibc-32bit-2.11.1-0.17.4
glibc-profile-32bit-2.11.1-0.17.4
glibc-locale-32bit-2.11.1-0.17.4
gcc43-32bit-4.3.4_20091019-0.7.35 

7.2.1 INS-10008 Error During Database Installation

While performing Oracle Grid Infrastructure installation, if the Grid Naming Service (GNS) and Dynamic Host Configuration Protocol (DHCP) options are selected and automatic execution of root script is enabled, the installation may fail with the following error:

[INS-10008] Session Initialization failed 

Workaround:

Remove the directory GI_HOME recursively before clicking the Install button on the summary page.

This issue is tracked with Oracle bug 16196582.

7.3.1 Oracle ACFS and Oracle ADVM May Not Mount After System Restart

Rarely, Oracle ACFS and Oracle ADVM devices in /dev/asm are set to the root group ID while the udev rules file, /etc/udev/rules.d/55-usm.rules, specifies a different group ID. As a result, Oracle ACFS and Oracle ADVM may not mount after system restart.

Workaround:

Edit the /etc/rc.local file and add the following entry:

/sbin/start_udev

Oracle ACFS and Oracle ADVM devices are created with the expected settings according to the udev rules file.

This issue is tracked with Oracle bug 13653789.

7.3.2 Issues in Creating Oracle ACFS Volume

Oracle Automatic Storage Management Configuration Assistant cannot be used to create Oracle ACFS volume with stripe column 1.

Workaround:

Use the asmcmd volcreate command or the ALTER DISKGROUP SQL statement to create the volume. After the volume is created, you can use Oracle Automatic Storage Management Configuration Assistant to create Oracle ACFS file system.

This issue is tracked with Oracle bug 16347687.

8.2.1 32-Bit Oracle Database Client Installation Fails on Linux x86

The 32-bit Oracle Database Client installation may fail on Oracle Linux 7 and Red Hat Enterprise Linux 7 on Linux x86 systems.

Workaround:

For Oracle Linux 7, install the glibc-2.17-55.0.4.el7 package.

For Red Hat Enterprise Linux 7, the issue is tracked with Red Hat bugzilla 1150282. Contact Red Hat for a fix.

This issue is tracked with Oracle bug 19028658.

8.2.2 Oracle Database 12c Installation on Oracle Linux 7 and Red Hat Enterprise Linux 7 Fails

Oracle Database 12.1.0.2 installation on Oracle Linux 7 and Red Hat Enterprise Linux 7 fails with a missing compat-libstdc++-33 package error.

Workaround:

Ignore the compat-libstdc++-33 package requirement error and proceed with the installation.

This issue is tracked with Oracle bug 21151912.

8.3.1 Oracle ACFS and Oracle ADVM May Not Mount After System Restart

Rarely, Oracle ACFS and Oracle ADVM devices in /dev/asm are set to the root group ID while the udev rules file, /etc/udev/rules.d/55-usm.rules, specifies a different group ID. As a result, Oracle ACFS and Oracle ADVM may not mount after system restart.

Workaround:

Edit the /etc/rc.local file and add the following entry:

/sbin/start_udev

Oracle ACFS and Oracle ADVM devices are created with the expected settings according to the udev rules file.

This issue is tracked with Oracle bug 13653789.

8.3.2 Error When Running the acfsdriverstate Command

When running the acfsdriverstate command for Cluster Verification Utility (CVU), Oracle Universal Installer, or the root scripts, you may encounter a permission denied error if the current working directory is not accessible to the user.

Workaround:

Change the current working directory to a directory where the user running the command has access, such as the user's home directory or /tmp, before running the acfsdriverstate command.

This issue is tracked with Oracle bug 18364777.

8.3.3 Oracle Universal Installer Issue on Oracle Linux 7 and Red Hat Enterprise Linux 7

On Oracle Linux 7 (64-bit) and Red Hat Enterprise Linux 7 (64-bit), certain tools such as Oracle Universal Installer, Oracle Database Configuration Assistant, and Oracle Enterprise Manager Configuration Assistant cannot display the non-English multibyte character language messages. For example, languages such as Japanese, Chinese, and Korean are not displayed by these tools on Oracle Linux 7 (64-bit) and Red Hat Enterprise Linux 7 (64-bit).

Workaround:

Run the following commands for the Japanese language:

mkdir /usr/share/fonts/japanese/TrueType
cd /usr/share/fonts/japanese/TrueType
ln -s /usr/share/fonts/wqy-zenhei/wqy-zenhei.ttc sazanami-gothic.ttf

Run the following commands for the Chinese language:

mkdir /usr/share/fonts/chinese/TrueType
cd /usr/share/fonts/chinese/TrueType
ln -s /usr/share/fonts/wqy-zenhei/wqy-zenhei.ttc uming.ttf

Run the following commands for the Korean language:

mkdir /usr/share/fonts/korean/TrueType
cd /usr/share/fonts/korean/TrueType
ln -s /usr/share/fonts/wqy-zenhei/wqy-zenhei.ttc gulim.ttf

Next, start Oracle Universal Installer.

This issue is tracked with Oracle bug 19381563.

8.3.4 Database Smart Flash Cache Error on Oracle Linux 7

When using Database Smart Flash Cache on Oracle Linux 7, you may encounter an ORA-439 error.

Workaround:

Download and install the patch associated with Oracle bug 19504946 when it is available on the My Oracle Support website.

This issue is tracked with Oracle bug 19504946.

8.3.5 Intel C++ Compiler Error on Oracle Linux 7 and Red Hat Enterprise Linux 7

When compiling C++ code on Oracle Linux 7 and Red Hat Enterprise Linux 7 with Intel C++ Compiler 12, you may encounter the following errors:

/usr/include/c++/4.8.2/ext/atomicity.h(49): error: identifier__ATOMIC_ACQ_REL" is undefined { return __atomic_fetch_add(__mem, __val, __ATOMIC_ACQ_REL); }
/usr/include/c++/4.8.2/ext/atomicity.h(49): error: identifier "__atomic_fetch_add" is undefined { return __atomic_fetch_add(__mem, __val, __ATOMIC_ACQ_REL); }

Workaround:

Upgrade to Intel C++ Compiler 13.0.

This issue is tracked with Oracle bug 19583928.

8.3.6 Oracle ACFS is Not Supported

Oracle Automatic Storage Management Cluster File System (Oracle ACFS) is not supported on Oracle Linux 7 and Red Hat Enterprise Linux 7.

Workaround:

Download and install the patch associated with Oracle bug 18321597 when it is available on the My Oracle Support website.

This issue is tracked with Oracle bug 18321597.