HP-UX Workload Manager A.03.05.xx Release Notes for HP-UX 11i v3 (B8843-90051, February 2011)
Table Of Contents
- HP-UX Workload Manager A.03.05.xx Release Notes
- Table of Contents
- 1 Announcement
- 2 New in this version
- 3 Known problems and workarounds
- System panic when PRM is enabled; install failure in absence of PRM when certain kernel patches are present
- Capping issue
- WLM uses only the assigned CPU resources even with utilitypri set
- Temporary Instant Capacity (TiCAP) expires while WLM is managing nPartitions
- Automatic activation of Instant Capacity core without authorization
- Partition management affected when cores are deactivated with iCAP on fully owned system
- Application hangs in FSS group
- Shutdown slow; “Waiting for shutdown confirmation” and “Shutdown initiated; however, ... unable to acquire confirmation” messages displayed
- Unable to get CPU allocation due to number of processes
- Collectors abort when updated while running
- GlancePlus/OpenView Performance Agent and processor sets
- GlancePlus may not correctly identify processes’ PRM groups
- glance Adviser memory consumption increases continually
- WLM enables/disables SLOs at end of interval
- No metrics on startup or reconfiguration
- WLM configurations cannot be activated with fewer than 100 Mbytes of memory available
- Secure Resource Partitions: Blocked port on a virtual network interface
- Reaching the system V semaphore limit
- Configuration wizard requires PRM
- Processes in transient FSS groups appear unexpectedly in other workload groups
- Modifying a managed partition requires WLM and the global arbiter be stopped
- Performing online cell operations
- WLM GUI is not compatible with different versions of WLM
- "Message violation" error
- Upgrading or installing PRM before upgrading WLM can cause failed swverify checks
- 4 Compatibility information and installation requirements
- Disk and memory requirements
- Network operating environment
- Compatibility with other software
- Compatibility with long hostnames
- Compatibility with X Windows
- Compatibility with GlancePlus
- Compatibility with HP Integrity Virtual Machines
- Compatibility of WLM virtual partition management and Instant Capacity / PPU
- Compatibility of WLM virtual partition management and certain CPU bindings
- Compatibility of WLM partition management and PSETs
- Compatibility of psrset and PSETs
- Compatibility with PRM
- Compatibility with gWLM
- Compatibility with Java
- Installation procedure
- 5 Patches and fixes in this version
- 6 Software availability in native languages
- 7 Security
- 8 Available manuals
- 9 WLM toolkits
- 10 Providing feedback
- 11 Training
3 Known problems and workarounds
This section discusses problems and workarounds for version A.03.04 and A.03.05.
System panic when PRM is enabled; install failure in absence of PRM when
certain kernel patches are present
Issue On HP-UX 11i v1, a system panic problem occurs when Process Resource
Manager (PRM) is enabled. In addition, WLM installation fails when certain
core kernel patches are present and PRM is absent.
Workaround Install the version A.01.00.00.07 or later PROCSETS product bundle, which
includes critical core kernel and processor set patches. It also installs patches
PHKL_30032 through PHKL_30036 or their superseding patches. For patch
descriptions, refer to Table 4-4 (page 28).
Capping issue
Issue WLM maintains CPU resource allocations for workloads by capping their CPU
access. Unfortunately, an algorithm in the CPU scheduler that WLM uses does
not always preserve capping on HP-UX 11i v1 and HP-UX 11i v2.
You may see symptoms of this issue in wlminfo output as in the portion of
sample output shown below, with the g_nice group having its “CPU Util”
value significantly higher than the “CPU shares” value:
# wlminfo group
Workload Group PRMID CPU Shares CPU Util Mem Shares State
OTHERS 1 450.00 4.49 0.00 ON
g_nice 2 108.00 125.57 0.00 ON
g_nightly 3 0.00 0.00 0.00 OFF
g_team 4 6.00 0.00 0.00 ON
For a given group, if its “CPU Util” value is ever significantly greater than its
“CPU Shares” value, your system is affected by this issue. (“CPU Util” values
slightly above “CPU Shares” are normal.)
Workaround On HP-UX 11i v1 (B.11.11), install patches PHKL_30034, PHKL_30035,
PHKL_31993, PHKL_31995, and PHKL_32061. Install all these patches at the
same time.
On HP-UX 11i v2 (B.11.23), install the BUNDLE11i patch bundle. Any version
of this bundle is acceptable.
WLM uses only the assigned CPU resources even with utilitypri set
Issue
In an Instant Capacity (iCAP) environment, with utilitypri set in your WLM
global arbiter configuration, WLM ensures all your owned cores are active.
However, if Instant Capacity is not configured in the environment (no designated
Instant Capacity cores), WLM uses only the cores that were assigned to virtual
partitions when the WLM global arbiter (wlmpard) was started.
Workaround
Be sure to assign all the owned cores using vparmodify before you start
wlmpard. If wlmpard is already running, stop it (with the -k option) and assign
all the owned cores using vparmodify.
System panic when PRM is enabled; install failure in absence of PRM when certain kernel patches are present 13