[讨论] 为什么其他人的system.gc引启的GC都有system标志，为什么我的没有呢？
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xgj1988
2015-08-12
别人的：
72117.421: [Full GC (System) 72117.423: [CMS: 905025K->1529502K(4096000K), 5.3562640 secs] 3556285K->1529502K(7168000K), 我的 2015-08-12T20:35:49.620+0800: 4.886: [Full GC2015-08-12T20:35:49.620+0800: 4.886: [CMS: 8067K->11295K(86080K), 0.0831676 secs] 33421K->11295K(124800K), [CMS Perm : 23403K->23395K(23552K)], 0.0833236 secs] [Times: user=0.08 sys=0.02, real=0.08 secs] 为什么别人的有System标识，而我的没有呢， 环境是： 系统：win7 JDK：java version "1.7.0_51" Java(TM) SE Runtime Environment (build 1.7.0_51-b13) Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode) 我的JVM参数：-XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:+ScavengeBeforeFullGC -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=syslog/heap.bin -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:syslog/gc.log |
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xgj1988
2015-08-12
而且用jstat 查看。
为什么GCC那一列是NO GC呢 100.00 0.00 74.34 9.26 99.54 2 0.035 0 0.000 0.035 Allocation Failure No GC 0.00 0.00 0.31 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.31 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.31 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.31 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.31 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.61 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.61 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.61 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 0.61 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.64 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.64 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.64 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.80 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.80 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.80 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.80 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.80 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.80 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC 0.00 0.00 1.80 13.19 60.00 2 0.035 1 0.086 0.121 System.gc() No GC |
