| 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' |
| |
| 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 |
| |
| 7036544 |
| Database instance startup fails when sga_target was set to multiples of 4096M |
| 11.1.0.6 |
| Database instance startup fails with the following error " ORA-12853: insufficient memory for PX buffers: current 0K, max needed 2640K and ORA-04031: unable to allocate 21544 bytes of shared memory ("large pool","unknown object","large pool","PX msg pool")" |
| Fixed in 11.1.0.7, for 11.1.0.6 set the parameter large_pool_size in init.ora or increase the sga_target size. |
| |
| 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. |
| |