HP-UX Workload Manager A.03.01 Release Notes for HP-UX 11i v1 and HP-UX 11i v2

HP-UX Workload Manager Release Notes

Known problems and workarounds

Reaching the system V semaphore limit

Issue

If your system has many system V semaphores in use, WLM’s use of

semaphores may push the total number of semaphores over system

limits—especially if the WLM configuration contains a large number of data

collectors. The WLM daemon wlmd creates two semaphore sets: one

containing a single semaphore; the other containing a semaphore for each

data collector in the WLM configuration.

If this system limit is reached, wlmd prints the following error and exits

before the first WLM interval begins:

Cannot allocate a system V semaphore set of size x: Increase

the system-imposed limits.

You may also see the following error:

WLM--”wm_knob_init, prm_rep_load”: PRM--”PRM internal daemon

binary is missing or has incorrect permissions (PRM-2352)”

For additional details relating to this message, look in syslog. In some

conditions, this message indicates no semaphores are available.

Workaround

Use /usr/sbin/sam to increase the system limits.

On HP-UX 11i v1 and later, increase the following kernel parameters:

semmns Max number of overall semaphores

semmsl Max number of semaphores allowed in a semaphore set

Configuration wizard requires PRM

Issue

Starting with the WLM A.03.01 release, WLM no longer includes Process

Resource Manager (B3835DA). WLM’s configuration wizard requires PRM

however. Without PRM installed, the wizard:

• Always sets the initial CPU count to 1 in the pop-up dialog that appears

before the wizard itself appears

• Returns a message about the PRM API not being installed when it

attempts to validate a configuration