Resolution and speed with servo motor

--update--

i changed the base period and servo period
base perio is 22000
servo period is 90000
and the scale is 50(1 rotation is 10mm | 10 mm equal 500 pulses it is good)
and i take max 2500rpm for jog speed(25000mm/min)  
when i decrease the base period for example 20000 i take maximum 3000rpm but sometimes program give following error so that 22000 is good

and also when i open the axis program
"Unexpected realtime delay on task 0 with period 22000
This Message will only display once per session
Run the Latency Test and resolve before counting"
What should i do?