4593892 |
repeated warnings in dmesg about lost ticks (it 80129/bz 139376) |
usually seen on x86-64, both Intel and Opteron based systems |
dmesg will have errors like: warning: many lost ticks. Your time source seems to be instable or some driver is hogging interrupts rip __do_softirq+0x4d/0xd0 |
Fixed in U5 |
|
5041764 |
CFQ io scheduler can delay/hang io (bz 184535/it 88208 ) |
heavy io access to raw/block devices |
io requests will start to hang or take a long to complete RAC node could be evicted |
Fixed in U4. Pre-U4, boot w/ elevator=deadline |
|
5058952 |
e1000 flow control defaults to none in the 2.6 kernel |
e1000 network interfaces with heavy traffic |
Network performance of the system is affected. For e.g: In the case of a RAC cluster, this may result in lost global cache blocks. |
Fixed in U4. Pre-U4, load e1000 with FlowControl=1 (Rx) |
|
5093059 |
netdump doesn't load with bonding configured (it 85145) |
bringing up netdump over a bonded interface |
/var/log/messages will have an error: netlog: bond0 doesn't support polling, aborting. |
Fixed in U4. |
|
5136660 |
bonding primary=ethX doesn't take effect |
Bonding doesn't take effect |
If we make a bond of eth5 and eth6, where eth6 is primary, on reboot eth5 will become active which makes server inaccessible. |
Fixed in 2.6.9.42.0.3.0.2.EL kernel or higher |
|
5333606 |
rpm throws errors if selinux is disabled at OS installation and is enabled at runtime |
error at rpm packages installs |
during packages installation, errors indicate the scriplet failures |
relabel the filesystems through 'touch /.autorelabel' or 'fixfilesrelabel' |
|
5447805 (BZ 202186) |
Kernel panic on 'aio_put_req' with x86_64 RHEL 4 AS U3 when all multipathed paths fails at the same time |
multipath solutions |
Kernel panic on aio_out_req |
Fixed in kernel-2.6.9-42.5.EL.src.rpm (available from RedHat) or in kernel-smp-2.6.9.42.0.3.0.3.EL.x86_64.rpm (available from Oracle) |
|
5463714 |
system will hang if reboot or restart iscsi service without unmount ocfs2 partition on iscsi volume |
system hang |
restart iscsi service or reboot without umount iscsi volume cause system hang |
unmount iscsi volume before restart iscsi service or reboot server |
|
5593995 |
Using Pro*C causes the system to run out of memory |
Caused the system to hang. |
The system hangs. |
For OEL5U3, Remove references to pathnames that do not exist on your system in pcscfg.cfg. Fixed in OEL5U4. |
|
5693201 |
Application does not detect OEL4 as RHEL4 |
Applications that use /etc/redhat-release for detection of distribution |
Applications that use /etc/redhat-release for detection of distribution may error out |
echo "Red Hat Enterprise Linux AS release 4 (Nahant Update 4)" > /etc/redhat-release |
|
7240271 |
Kernel panic occurs while starting up Oracle Enterprise Manager agent |
2.6.9-67.0.20.0.1.EL ( OEL ) or 2.6.9-67.0.20.EL ( RHEL ) kernels |
Machine will experience a linux BUG, panic & reboot, when the EM Agent starts. |
EL4.6 errata ( 2.6.9-67.0.20.0.2 and 2.6.9-67.0.22.0.1) kernel patches that have this fix. |
|
Redhat Bugzilla 202027 |
Clear_kernel_mapping: mapping has been split. will leak memory |
Seen on x86-64 Opteron based systems |
/var/log/messages will have errors like clear_kernel_mapping: mapping has been split. will leak memory |
Fixed in U5 |
|
5240928 |
warning messages in trace files during certain workloads with async io turned on |
Performance under high i/o load |
Following warning in trace files WARNING: ORACLE PROCESS RUNNING OUT OF OS KERNEL I/O RESOURCES |
Fixed in 10.2.0.4. For 10g, versions lower than 10.2.0.4 ,apply patch 5452672. |
|
5215593 |
unable to start RAC with db_cache_size > 4gb |
RAC instances with > 4gb db_cache_size |
nodes that started up correctly with 10.2.0.1 may fail to startup with ORA-4031 errors in 10.2.0.2 |
Fixed in 10.2.0.4. For 10g, versions lower than 10.2.0.4, apply patch 5940792; or set _ksmg_granule_size=33554432 in the init.ora. Larger sga sizes may need a higher value. |
|
5526245 |
warning messages in trace files from qmnc process |
10.2.0.2 and 10.2.0.3 RAC |
Following warning in trace files - KSXPLOOKUP: warning cnh incarnation number may be stale ... |
Fixed in 10.2.0.4. For 10g, versions lower than 10.2.0.4 ,apply patch 5526245. |
|
6057703 |
ORA-00600:[kclchkblkdma_3] in RAC instance |
10.2.0.3 RAC |
the user process may terminate leaving the above mentioned traces in alert/trace files |
Fixed in 10.2.0.4. For 10g, versions lower than 10.2.0.4 ,apply patch 6614205. |
|
6682370 |
When configuring the cluster interconnect the interface name should not contain a "." |
10.2.0.3 cluster interconnect configuration |
If the interface name being used as the private interconnect contains a "." then 1. oifcfg getif does not display the confguration; and 2. The public interface gets used as the cluster interconnect |
Fixed in 10.2.0.4. For 10g, versions lower than 10.2.0.4 avoid using interface names with a "." |
|
8451866 |
Incorrect multipath.conf setting affects RAC node failover. Settings(features = "1 queue_if_no_path") and/or (no_path_retry = queue) causes the node hang if io path fails. no_path_retry has to be set to the numeric value explicitly. |
All applications using device mapper multipath devices which have contingency plan in case of io path failure. |
RAC node hangs if io path fails. |
In configuration file /etc/multipath.conf,set no_path_retry and polling_interval to the numeric values, for example, "no_path_retry=5" and "polling_interval=10" so as to disable queuing. These values depend on system workload. |
|
5768303 |
Under load with device mapper the system reboots |
Running Oracle with device-mapper |
under high-stress, SCSI paths are lost and servers reboot. Messages in /var/log/messages |
For qla2xxx and qla2400 options qlport_down_retry=1 & ql2xretrycount=5 in modprobe.conf Upgraded qLogic driver to release 8.01.06 failback parameter IMMEDIATE set to 1 in the device mapper config file |
|
Oracle Bugzilla 3032 |
NOT ALL I/O PATHS ARE RECOVERED WITH MULTIPATH TOOL AFTER PATH FAILURE and RECOVERY. With 8.01.07 Qlogic driver |
The number of paths available for i/o |
when a host port or storage port is blocked then unblocked or when a cable is removed then restored - one or more paths are reported down in /var/log/messages a'path is down'. |
Fixed in 8.02.14.01 driver, the following settings with 8.01.07 driver is required in modprobe.conf ConfigRequired=0 ql2xprocessrscn=1 ql2xprocessnotready=0 ql2xsuspendcount=3 ql2xretrycount=5 qlport_down_retry=3 ql2xfailover=0 ql2xioctltimeout=10 |
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