java堆压测

$ jstat -gc 16482 5000
S0C S1C S0U S1U EC EU OC OU MC MU CCSC CCSU YGC YGCT FGC FGCT GCT
10752.0 10752.0 0.0 0.0 131072.0 82630.4 1978880.0 1955174.7 8832.0 8201.6 1152.0 976.8 5 0.203 4 1.657 1.860
10752.0 10752.0 0.0 0.0 131072.0 81318.3 583168.0 471823.4 8832.0 8272.6 1152.0 977.4 8 0.304 7 2.505 2.809
10752.0 10752.0 0.0 0.0 131072.0 81073.7 2473984.0 2425465.2 8832.0 8341.1 1152.0 981.8 10 0.385 9 3.136 3.521
10752.0 10752.0 0.0 0.0 131072.0 81235.8 2796544.0 2660346.6 8832.0 8349.1 1152.0 981.8 12 0.436 11 3.678 4.114
10752.0 10752.0 0.0 0.0 131072.0 80895.8 1097216.0 1019722.5 8832.0 8386.0 1152.0 981.8 15 0.617 14 4.594 5.211
10752.0 10752.0 0.0 0.0 131072.0 80870.1 1741312.0 1723358.5 8832.0 8398.4 1152.0 981.8 17 0.703 16 5.084 5.787
10752.0 10752.0 0.0 0.0 131072.0 80874.9 836608.0 708245.5 9088.0 8428.5 1152.0 981.8 20 0.834 19 6.025 6.860
10752.0 10752.0 0.0 0.0 131072.0 80980.7 2429952.0 2426996.9 9088.0 8454.8 1152.0 981.8 22 0.922 21 6.530 7.452
10752.0 10752.0 0.0 32.0 131072.0 81053.1 2796544.0 2740012.4 9088.0 8476.5 1152.0 981.8 25 1.027 24 7.083 8.111
10752.0 10752.0 0.0 0.0 131072.0 80867.0 954368.0 939548.4 9088.0 8501.1 1152.0 981.8 27 1.090 26 7.876 8.965
10752.0 10752.0 0.0 0.0 131072.0 80981.8 2569216.0 2424435.7 9088.0 8509.3 1152.0 981.8 29 1.161 28 8.378 9.539
10752.0 10752.0 0.0 0.0 131072.0 80861.8 695808.0 549948.0 9088.0 8534.5 1152.0 981.8 32 1.260 31 9.118 10.378
10752.0 10752.0 0.0 0.0 131072.0 80979.2 2414080.0 2346823.4 9088.0 8537.8 1152.0 981.8 34 1.325 33 9.617 10.943
10752.0 10752.0 0.0 0.0 131072.0 80860.8 1220096.0 1174948.9 9088.0 8540.2 1152.0 981.8 37 1.412 36 10.313 11.725
10752.0 10752.0 0.0 0.0 131072.0 80898.6 2587648.0 2581709.6 9088.0 8540.2 1152.0 981.8 39 1.470 38 10.776 12.246
10752.0 10752.0 0.0 0.0 131072.0 0.0 2796544.0 3585.0 9088.0 8550.3 1152.0 981.8 43 1.627 42 11.499 13.126
10752.0 10752.0 0.0 0.0 131072.0 80864.0 1721344.0 1642415.3 9088.0 8558.1 1152.0 981.8 46 1.727 45 12.294 14.022

public class Hello {

public static void main(String[] args) {
System.out.println("hello");
String a = null;
for (int i = 0; i < 2; i++) {
ArrayList<Integer> list = new ArrayList (20000000);
i -- ;
System.out.println("hello");
}
}

}