we have a similar problem with db2 9.5 fp8 on p/linux and performance manager
opm is trying to get a snapshot and gets this error
[17:10:46.285]Terminating :Error while taking history snapshot. PMGETLIST failed, rc=-1042: snapproc.c 5021 -1042
QL1042C An unexpected system error occurred. SQLSTATE=58004
this for only 1 database in this instance (we have more - and monitored)
no entry in diag log either..