JVM 之 MAT

zhixingheyi_tian2026-03-15 8:55

MAT 各类版本

http://eclipse.dev/mat/download/previous/

https://mirrors.aliyun.com/eclipse/mat/1.11.0/rcp/

案例分析

csharp 复制代码

]# jcmd 3537362 GC.heap_info
3537362:
 PSYoungGen      total 1191424K, used 793611K [0x0000000774b00000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1150976K, 68% used [0x0000000774b00000,0x00000007a51f2cc0,0x00000007baf00000)
  from space 40448K, 0% used [0x00000007baf00000,0x00000007baf10000,0x00000007bd680000)
  to   space 40448K, 0% used [0x00000007bd880000,0x00000007bd880000,0x00000007c0000000)
 ParOldGen       total 1233920K, used 991970K [0x0000000729600000, 0x0000000774b00000, 0x0000000774b00000)
  object space 1233920K, 80% used [0x0000000729600000,0x0000000765eb88a0,0x0000000774b00000)
 Metaspace       used 72037K, capacity 73917K, committed 79312K, reserved 1116160K
  class space    used 9294K, capacity 10257K, committed 11904K, reserved 1048576K



#  jcmd 3544263  GC.heap_info
3544263:
 PSYoungGen      total 1189376K, used 554980K [0x0000000774b00000, 0x00000007bfe80000, 0x00000007c0000000)
  eden space 1146368K, 45% used [0x0000000774b00000,0x00000007948f6f78,0x00000007baa80000)
  from space 43008K, 76% used [0x00000007baa80000,0x00000007bca82460,0x00000007bd480000)
  to   space 43008K, 0% used [0x00000007bd480000,0x00000007bd480000,0x00000007bfe80000)
 ParOldGen       total 1233920K, used 75742K [0x0000000729600000, 0x0000000774b00000, 0x0000000774b00000)
  object space 1233920K, 6% used [0x0000000729600000,0x000000072dff7af0,0x0000000774b00000)
 Metaspace       used 80621K, capacity 83136K, committed 88960K, reserved 1124352K
  class space    used 10526K, capacity 11767K, committed 13696K, reserved 1048576K