jstat -gcutil -t 18987 1000
where 18987 is the java PID, and 1000 is the number of milliseconds (1 second) between samples
896794.7 0.00 0.00 4.01 5.63 98.94 9259 282.051 250 336.211 618.262 896795.7 0.00 0.00 5.31 5.63 98.94 9259 282.051 250 336.211 618.262 896796.7 0.00 0.00 5.31 5.63 98.94 9259 282.051 250 336.211 618.262 896797.7 0.00 0.00 5.71 5.63 98.94 9259 282.051 250 336.211 618.262 896798.6 0.00 0.00 5.71 5.63 98.94 9259 282.051 250 336.211 618.262 896799.6 0.00 0.00 5.95 5.63 98.94 9259 282.051 250 336.211 618.262 896800.6 0.00 0.00 5.95 5.63 98.94 9259 282.051 250 336.211 618.262 896801.6 0.00 0.00 6.10 5.63 98.94 9259 282.051 250 336.211 618.262 896802.6 0.00 0.00 6.11 5.63 98.94 9259 282.051 250 336.211 618.262 896803.7 0.00 0.00 6.66 5.63 98.94 9259 282.051 250 336.211 618.262 896804.7 0.00 0.00 6.74 5.63 98.94 9259 282.051 250 336.211 618.262 896805.7 0.00 0.00 6.84 5.63 98.94 9259 282.051 250 336.211 618.262 896806.7 0.00 0.00 6.88 5.63 98.94 9259 282.051 250 336.211 618.262 896807.7 0.00 0.00 6.96 5.63 98.94 9259 282.051 250 336.211 618.262 896808.7 0.00 0.00 6.99 5.63 98.94 9259 282.051 250 336.211 618.262 896809.7 0.00 0.00 7.04 5.63 98.94 9259 282.051 250 336.211 618.262 896810.7 0.00 0.00 7.05 5.63 98.94 9259 282.051 250 336.211 618.262 896811.7 0.00 0.00 7.60 5.63 98.94 9259 282.051 250 336.211 618.262 896812.7 0.00 0.00 7.64 5.63 98.94 9259 282.051 250 336.211 618.262 896813.7 0.00 0.00 7.66 5.63 98.94 9259 282.051 250 336.211 618.262 896814.7 0.00 0.00 7.73 5.63 98.94 9259 282.051 250 336.211 618.262 896815.7 0.00 0.00 7.73 5.63 98.94 9259 282.051 250 336.211 618.262 896816.7 0.00 0.00 7.77 5.63 98.94 9259 282.051 250 336.211 618.262 896817.7 0.00 0.00 7.88 5.63 98.94 9259 282.051 250 336.211 618.262 896818.7 0.00 0.00 7.88 5.63 98.94 9259 282.051 250 336.211 618.262