You can specify all counters or as few as a single instance of a counter.
sysmon – samples all counters marked by Sybase as most important to performance and tuning. This is the default value.
rs_helpcounter sysmon
"all" – samples all counters.
module_name – samples all counters for a particular module.
module_name, display_name – samples all instances of a particular counter. Use sp_helpcounter for a list of counters.
module_name, display_name, instance_id – samples a particular instance of a counter. To find the numeric ID for an instance, execute admin_who and see the Info column.
admin stats, sysmon, display, 1