Virtual Machine Configurations

Oracle Linux 5 Update 7 x86_64

Kernel

kernel-uek-2.6.32-200.13.1.el5uek or higher

Virtualization Type

Paravirtualized

File System

Mount Options

Details

ext3

None

For single instance database files.

File Name	Conf File Settings	Comments
/etc/modprobe.conf	alias eth0 xennet	-
	alias scsi_hostadapter xenblk	-
/etc/security/limits.conf	oracle soft nproc 131072	-
	oracle hard nofile 131072	-
	oracle soft nofile 131072	# depending on size of db, these may need to be larger
	oracle soft core unlimited	-
	oracle hard core unlimited	-
	oracle hard nproc 131072	-
/etc/sysctl.conf	net.core.rmem_default = 262144	-
	net.core.wmem_default = 262144	-
	fs.aio-max-nr = 3145728	-
	fs.file-max = 6815744	-
	net.ipv4.ip_local_port_range = 9000 65500	-
	net.core.rmem_max = 4194304	-
	net.core.wmem_max = 262144	-
	kernel.shmmax = 16892102656	-
	kernel.shmall = 8187841	-
	kernel.shmmni = 4096	-
	kernel.sem = 250 32000 100 142	-
	kernel.msgmni = 2878	-
	kernel.msgmax = 8192	-
	kernel.msgmnb = 65536	-
	net.ipv4.tcp_syncookies = 1	-
	kernel.core_uses_pid = 1	-
	net.ipv4.conf.default.rp_filter = 2	-
	kernel.sysrq = 1	-

Oracle

Oracle Database 10g Release 2, Single Instance for Linux x86_64

Version

10.2.0.4

Patch

None

Bug No

9466221

Summary

Dmesg displays "Task XXXX: blocked for more than 120 seconds" under load

Affects

Systems on OEL5.5/RHEL5.5

Symptoms

Following messages may be seen in dmesg - "Task XXXX: blocked for more than 120 seconds"

Solution

These messages are only for information;newly added in OEL5.5/RHEL5.5. To disable this messages echo 0 > /proc/sys/kernel/hung_task_timeout_secs"

Bug No

10056679

Summary

unable to start X

Affects

X environment

Symptoms

On some hardware startup of X environment may fail after upgrading to Unbreakable Enterprise Kernel with following Error:#Fatal server error:#Cannot run in framebuffer mode. Please specify busIDs for all framebuffer devices.

Solution

reconfigure X using command "X -configure" and use generated configuration file to start X environment.

Bug No

10104470

Summary

Error message on boot, "Unable to set hardware clock"

Affects

None

Symptoms

Error message at boot or at runtime while attempting to set the hardware clock

Solution

This error at boot can be safely ignored. If this error is encountered at runtime, install util-linux-2.13-0.52.0.1.rpm. Fixed in EL5U6

Bug No

5240928

Summary

warning messages in trace files during certain workloads with async io turned on

Affects

Performance under high i/o load

Symptoms

Following warning in trace files WARNING: ORACLE PROCESS RUNNING OUT OF OS KERNEL I/O RESOURCES

Solution

Fixed in 10.2.0.4. For 10g, versions lower than 10.2.0.4 ,apply patch 5452672.

Oracle VM Server 3.1.1 , Guest VM - Oracle Linux 5 Update 7 x86_64 ,Paravirtualized with Oracle 10.2.0.4