java堆压测 - 悦读

$ 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");
        }
    }

}