线上内存告警占用了90%+ 订单服务占用了42% 8.3g,分析订单服务是否可以降低配置。
分析
1.查看应用实际占用内存
cat /proc/{pid}/status
2.查看jvm启动参数
3.查看高峰期的时候jvm内存增长率
jstat -gcutil {pid} 1000 500 1000:1秒采集一次 500:采集500次
结论:
1.eden区108秒会触发回收一次，每次回收上一次耗时 和下一次耗时详见得出3.234-3.222=0.012s 回收用了 12毫秒
2:老年代上次回收和下一次回收空间是一致的,表示几乎没增长
3.eden区平均每秒增长率:108/100=1.8
0.00 57.89 0.58 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 1.32 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 1.90 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 3.05 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 3.65 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 3.83 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 5.58 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 6.41 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 7.55 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 8.29 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 8.89 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 10.62 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 11.34 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 12.79 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 13.52 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 13.95 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 15.36 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 16.56 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 17.74 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 18.88 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 19.48 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 20.99 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 21.90 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 22.89 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 23.49 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 25.24 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 26.77 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 29.01 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 29.85 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 30.68 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 32.09 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 32.92 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 33.58 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 34.96 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 36.34 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 37.91 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 38.24 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 39.38 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 41.50 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 42.82 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 43.40 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 44.13 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 45.13 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 45.70 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 46.54 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 47.56 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 48.43 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 48.85 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 50.25 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 51.50 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 52.66 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 53.27 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 53.48 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 54.66 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 55.39 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 56.55 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 57.28 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 57.85 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 58.43 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 59.16 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 59.74 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 60.47 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 61.88 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 63.18 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 63.76 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 65.48 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 67.22 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 67.39 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 67.96 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 68.95 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 69.11 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 69.95 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 70.96 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 72.52 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 73.26 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 73.85 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 74.44 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 75.03 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 75.86 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 76.44 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 77.71 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 79.56 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 80.04 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 81.03 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 81.46 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 81.47 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 81.64 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 82.79 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 84.09 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 84.10 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 84.26 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 85.41 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 87.13 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 87.96 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 89.53 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 90.12 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 90.72 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 92.08 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 93.42 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 93.76 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 94.49 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 94.84 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 94.88 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 96.38 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 96.74 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 97.33 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 98.97 9.84 92.58 90.41 139 3.222 4 0.648 3.870 0.00 57.89 99.55 9.84 92.58 90.41 139 3.222 4 0.648 3.870