How can we suppress GSVC100W messages which  being output to SYSLOG?

Release: FAQSO.00200-14.2-SYSVIEW-Performance Management
Component:

To suppress the GSVW321W message, we should turn to NO following each message at prefix.CNM4BPRM ( CTHRESH) :

SETDEFAULT

JOBNAME =
TRAN =
RSCE =
LIMIT 0
WARNPCT *
TYPE *
RULETYPE AUTO
DURATION 2
TRIGLVL STATUS
PRIORITY 000
MSG YES  <=====  TURN to NO from YES.
LOG
SMF

You can also set the Log parameter to No to prevent it from writing a record to the log.

Then, recycle SYSVIEW with COLD start.