HP-UX Workload Manager Toolkits A.01.07.01 Release Notes for HP-UX 11.0, HP-UX 11i V1, and HP-UX 11i V2

[Sun Dec 14 18:02:40 2003]

[error] 14688: ModPerl::Registry: Can’t

locate

Apache.pm in @INC

These errors indicate that the Apache environment has issues with the example

mod_perl workload pig.pl.

Workaround Use a different mod_perl workload that you know works with your Apache

environment. Alternatively, focus on the .cgi and .php example workloads used

in the same section of the white paper.

PPUTK: Capping issue may affect PPUTK

Issue WLM maintains CPU allocations for workloads by capping their CPU access.

Unfortunately, an algorithm in the CPU scheduler that WLM uses does not always

preserve capping when one or more CPUs are deactivated on a Pay Per Use

system or an iCOD system.

Workaround Configure WLM as desired and then determine whether the capping issue is

present on your system. To determine whether this issue is present:

1. Activate your WLM configuration:

# wlmd -a configuration_file

2. Wait for several WLM intervals (60 seconds by default) to pass.

3. Display CPU shares and utilization data by entering the wlminfo command:

# wlminfo group

A portion of sample wlminfo output is shown below:

Workload Group PRMID CPU

Shares CPU Util Mem Shares State

OTHERS

1 450.00 4.49 0.00 ON

g_nice

2 108.00 55.57 0.00 ON

g_nightly

3 0.00 0.00 0.00 OFF

g_team

4 6.00 0.00 0.00 ON

4. Check the “CPU Shares” and “CPU Util” columns. 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.)

5. If your system is affected, install the following patches:

On HP-UX 11.0, install patch PHKL_29434.

On HP-UX 11i V1.0 (B.11.11), install patches PHKL_30032, PHKL_30033,

PHKL_30034, PHKL_30035, PHKL_30036, and PHKL_30037. Install all

these patches at the same time.

On HP-UX 11i V2.0 (B.11.23), install the BUNDLE11i patch bundle. Any

version is acceptable.

PPUTK: utilitydc message about activating a processor

Issue utilitydc generates the following message:

Unable to activate a processor.

8 HP-UX WLM Toolkits (WLMTK) Release Notes