树脂记忆问题

时间:2011-04-25 10:25:35

标签: memory-management jvm resin

我使用jvm参数启动了树脂3.0.28:

    -Xms6300M -Xmx6300M -Xss128k -XX:ThreadStackSize=256 -XX:MaxPermSize=128M 
-XX:PermSize=128M -verbose:gc -XX:+PrintGCDetails -XX:+UseParallelGC 
-XX:+PrintGCTimeStamps

但保留的内存已超过10GB

树脂有什么问题? 我使用jmap -heap,输出如下: 它表明jvm堆内存处于正常状态。

Attaching to process ID 9456, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 10.0-b22

using thread-local object allocation.
Parallel GC with 16 thread(s)

Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize      = 6606028800 (6300.0MB)
   NewSize          = 2686976 (2.5625MB)
   MaxNewSize       = -65536 (-0.0625MB)
   OldSize          = 5439488 (5.1875MB)
   NewRatio         = 2
   SurvivorRatio    = 8
   PermSize         = 134217728 (128.0MB)
   MaxPermSize      = 134217728 (128.0MB)

Heap Usage:
PS Young Generation
Eden Space:
   capacity = 2155151360 (2055.3125MB)
   used     = 1966086568 (1875.0062637329102MB)
   free     = 189064792 (180.30623626708984MB)
   91.22730795112228% used
From Space:
   capacity = 23265280 (22.1875MB)
   used     = 13849352 (13.207771301269531MB)
   free     = 9415928 (8.979728698730469MB)
   59.527983329665496% used
To Space:
   capacity = 23068672 (22.0MB)
   used     = 0 (0.0MB)
   free     = 23068672 (22.0MB)
   0.0% used
PS Old Generation
   capacity = 4404019200 (4200.0MB)
   used     = 3854164456 (3675.6176528930664MB)
   free     = 549854744 (524.3823471069336MB)
   87.51470602126349% used
PS Perm Generation
   capacity = 134217728 (128.0MB)
   used     = 53393152 (50.919677734375MB)
   free     = 80824576 (77.080322265625MB)
   39.78099822998047% used

1 个答案:

答案 0 :(得分:0)

你到底保留了什么?我假设您指的是进程本身分配的内存:

堆将不会使用超过您指定的数量(除了一些碎片,但这是次要的)。过程中的“其他物体”使用这个空间,虽然树脂或JVM可能有问题,特别是如果内存在数周内稳定增加,树脂和hvm使用的内存量也可能是正常的。 / p>

看看我尝试回答另一个类似的问题:

JVM memory consumption double of heapsize

简而言之:确保您查看正确的工艺尺寸。我通常在32位Debian系统上使用1-1.5 GB的非Java堆空间用于树脂(这当然会使你的4 GB声音很多)。

此外:
-Xss128k -XX:ThreadStackSize = 256

将被解释为

-XX:ThreadStackSize = 128 -XX:ThreadStackSize = 256,

所以你可能想要删除其中一个......(见http://mail.openjdk.java.net/pipermail/hotspot-dev/2011-June/004272.html