GC在.net 4.5中挂起多个appdomains。 [英] GC Hangs with multiple appdomains in .net 4.5.

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我们有一个Asp.net mvc webapi，有大约100个appdomains，每个包含一个扩展名。

We have a Asp.net mvc webapi which has about 100 appdomains, each containing a extension.

现在我们不时挂起api。即使是只返回字符串的状态api，也没有一条路由响应。

Now from time to time we have hangs of the api. Not a single route is responding even a status api which only returns a string does not reply.

当它挂起时，该网站有大约120个线程（这很正常），大约12个GB RAM。

When it hangs the site has about 120 threads (which is quite normal) and about 12 GB RAM.

当我们进行MemoryDump时，我们可以看到网站是总是在垃圾收集的中间。

When we do a MemoryDump we can see that the Site is always in the middle of a grabage collection.

大多数时候我们看到大多数线程都挂在堆栈中，代码处理appdomains之间的序列化并且是wai为GC而言。

Most of the time we see that the most threads hang in a stack with code handling the serializaition between the appdomains and is waiting for the GC.

等待大约5分钟的事件挂起没有结束。是否有任何已知的GarbageCollection问题被许多应用程序域所取代？

Event when waiting about 5 Minutes the hang does not end. Is there any known issues of the GarbageCollection realted to many appdomains?

当我查看"gc中的时间"性能计数器时，我可以看到该网站在GC中花费了大量的时间（约10％）

When I look at the "time in gc" perfromance counter I can see that the site is permantly spending a noticable about of time in GC (about 10%)

任何关于测试或尝试改进的提示？

Any hints on what to test or try to improve?

我可以期待在将运行时更新到4.5.2时有所改进吗？

Could I expect improvements when updating the runtime to 4.5.2 ?

如果有人收集点，我也会在SO上发布

I also posted on SO , if someone is collecting point

http://stackoverflow.com/questions/34207066/net-4-5-garbage-collection-hangs-with-many-appdomains