java ygc 频繁_jvm之判断ygc耗时和频率
Step1、找出所查java应用的进程编号
jps -mlv | grep 应用名称 # 或者 ps -ef | grep 应用名称
20848 com.lqz.test.Main -Dprogram=APP_/home/lqz/test/bin/.. -Xms4G -Xmx4G
Step2、查看应用的gc概况
$ jstat -gcutil 20848 250 10
S0 S1 E O P YGC YGCT FGC FGCT GCT
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 54.10 34.51 39.51 469204 5176.817 549 111.738 5288.555
56.25 0.00 5
Step1、找出所查java应用的进程编号 jps -mlv | grep 应用名称 # 或者 ps -ef | grep 应用名称 20848 com.lqz.test.Main -Dprogram=APP_/home/lqz/test/bin/.. -Xms4G -Xmx4G Step2、查看应用的gc概况 $ jstat -gcutil 20848 250 10 S0 S1 E O P YGC YGCT FGC FGCT GCT 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 52.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 54.10 34.51 39.51 469204 5176.817 549 111.738 5288.555 56.25 0.00 5