fcachedaemon utlizing 100% of CPU during backups

[dave.s]

Using data protector to backup single CPU guests, fcachedaemon starts consuming more and more CPU % until it eventually hits 100% bottlenecking the system from doing anything else. Eventually the system becomes unresponsive to any commands or login attempts.

If the backup is aborted it goes back down to under 1%. The issue persists on guests with more than one cpu however backups are able to complete since fcachedaemon is only hogging one of the CPU's.

I was hopeful when I read through this past thread
http://h30499.www3.hp.com/t5/System-Administration/fcachedaemon-started-using-100-CPU/m-p/4663610#M381251

But updating the system with the last vm cumulative patch did not help.

Software Specifications
- 11iv3 Sept 2010 OS installed on both the Host and Guests.
- IVM version 04.20.05 installed on both the Host and Guests.

Hardware Specifications
RX7640 1 Cell, 40Gig Memory, 4 Dual Core CPU's.

Allocated as follows to 6 guests.

Host #-> hpvmstatus
[Virtual Machines]
Virtual Machine Name VM # OS Type State #VCPUs #Devs #Nets Memory Rmt Host
==================== ===== ======= ========= ====== ===== ===== ======= ========
Guest 1 24 HPUX On (OS) 1 3 1 4 GB -
Guest 2 25 HPUX On (OS) 1 3 1 4 GB -
Guest 3 26 HPUX On (OS) 1 2 1 4 GB -
Guest 4 27 HPUX On (OS) 1 2 1 4 GB -
Guest 5 29 HPUX On (OS) 1 2 1 6 GB -
Guest 6 28 HPUX On (OS) 2 2 1 4 GB -

GuestAVIOStor B.11.31.1009 HPVM Guest AVIO Storage Software
GuestAvioLan B.11.31.1009 HPVM Guest AVIO LAN Software
HPVM-Guest B.04.20.05 Integrity VM Guest
VMGuestLib B.04.20.05 Integrity VM Guest Support Libraries
VMGuestSW B.04.20.05 Integrity VM Guest Support Software
PHKL_41211 1.0 vm page table mgmt cumulative patch
PHKL_41362 1.0 vm cumulative patch