Sun Microsystems SPARC Enterprise M8000 Product Notes page 27

Solaris OS Issues and Workarounds for All Supported Releases (3 of 4)
TABLE 5
CR ID Description
6614737 The DR deleteboard(8) and moveboard(8)
operations might hang if any of the following
conditions exist:
A DIMM has been degraded.
The domain contains system boards with
different memory size.
6619224 For Solaris domains that include SPARC 64 VII
processors, a single domain of 256 threads or
more might hang for an extended period of
time under certain unusual situations. Upon
recovery, the uptime command will show
extremely high load averages.
6623226 The Solaris command lockstat(1M) or the
dtrace lockstat provider might cause a system
panic.
6625734 Systems with large number of processors in a
single domain environment might have
suboptimal performance with certain
workloads.
6632549 fmd service on domain might fail to
maintenance mode after DR operations.
Workaround
Avoid performing DR operations if any of the
following conditions exist:
• Degraded memory – To determine whether the
system contains degraded memory, use the
XSCF command showstatus. For sample
output see
a System" on page
• Differing memory sizes – To determine whether
the domain contains system boards with
different memory sizes, display the list of
memory sizes using the XSCF command
showdevices or the prtdiag command on
the domain. For sample output, see
"Identifying Different Memory Sizes in a
System Board" on page
If a DR command hangs, reboot the domain to
recover.
For Solaris domains that include SPARC 64 VII
processors, do not exceed a domain size of 256
virtual processors in a single Solaris domain.
This means a maximum of 32 CPUs in a single
domain configuration (maximum configuration
for an M8000 server).
Do not use the Solaris lockstat(1M)
command or the dtrace lockstat provider.
Use processor sets to bind application processes
or LWPs to groups of processors. Refer to the
psrset(1M) man page for more information.
If fmd service fails, issue the following
commands on the domain to recover:
# svcadm clear fmd
Sun SPARC Enterprise M8000/M9000 Servers Product Notes
"Identifying Degraded Memory in
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