LLT 8.0 introduced a feature that sets llt_hb thread in uninterruptable sleep state (D) while waiting for i/o. The 'load average' takes into account both the processes waiting for CPU and the processes in uninterruptable sleep state.
The fix has been included in Access 8.0.200 which is available for download from:
https://www.veritas.com/content/support/en_US/downloads/update.UPD445144
To disable this feature temporarily:
# lltconfig -H hbthread:0
To disable this feature permanently:
# vi /etc/llttab
set-misc hbthread:0
To verify that this feature is disabled:
# lltconfig -H query
Current LLT miscellaneous values:
sleepalloc = 0
hbthread = 0