在IIS 6中，我们曾经使用两个第三方组件来进行Url重写:Helicon(用于处理无扩展名的url)和UrlRewriting.net。
不久前，我们仍然使用这两个组件迁移到IIS 7-经典模式。
现在，我们尝试使用 native .Net路由切换到不带第三方组件的集成模式。
路由工作正常，但是我们的Web应用程序的行为却完全不同。
我们的网络服务器过去一直将CPU使用率保持在10％以下，但现在很容易使用50％或更高的使用率。
我们已经开始分析内存转储，但似乎并没有找到问题的根源。
似乎.Net缓存机制正在阻止垃圾收集器？这与使用“集成模式”有什么关系？
您可以在下面找到我们分析的摘录。任何关于下一步寻找的建议将不胜感激。
> !analyze -v -hang
*****************************
*
* Exception Analysis
*
*****************************
GetPageUrlData failed, server returned HTTP status 404
URL requested: http://watson.microsoft.com/00000000.htm?Retriage=1
FAULTING_IP:
+aceb6a0
00000000`00000000 ?? ???
EXCEPTION_RECORD: ffffffffffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 0000000000000000
ExceptionCode: 80000003 (Break instruction exception)
ExceptionFlags: 00000000
NumberParameters: 0
FAULTING_THREAD: 0000000000000022
BUGCHECK_STR: HANG
PROCESS_NAME: w3wp.exe
ERROR_CODE: (NTSTATUS) 0xcfffffff - <Unable to get error code text>
EXCEPTION_CODE: (NTSTATUS) 0xcfffffff - <Unable to get error code text>
MOD_LIST: <ANALYSIS/>
NTGLOBALFLAG: 0
APPLICATION_VERIFIER_FLAGS: 0
MANAGED_STACK: !dumpstack -EE
OS Thread Id: 0x42ec (221)
Current frame:
Child-SP RetAddr Caller, Callee
0000000016aee3f0 000007feecbae407 (MethodDesc 000007feec936b88 +0x77 DomainNeutralILStubClass.IL_STUB_PInvoke(IntPtr, Int32, Boolean, IntPtr ByRef))
0000000016aee4f0 000007fef8408d0a (MethodDesc 000007fef81650a8 +0x4a System.Globalization.TextInfo.GetHashCodeOrdinalIgnoreCase(System.String))
0000000016aee510 000007feecbaea82 (MethodDesc 000007feec936d80 +0x42 DomainNeutralILStubClass.IL_STUB_PInvoke(IntPtr))
0000000016aee9e8 000007fef49b6f57 (MethodDesc 000007fef4993988 +0x47 System.Configuration.Internal.InternalConfigRoot.AcquireHierarchyLockForWrite())
0000000016aeeab0 000007fef49b6f57 (MethodDesc 000007fef4993988 +0x47 System.Configuration.Internal.InternalConfigRoot.AcquireHierarchyLockForWrite())
0000000016aeeae0 000007fef49c601e (MethodDesc 000007fef49870e0 +0x5e System.Configuration.Internal.InternalConfigRoot.RemoveConfigImpl(System.String, System.Configuration.BaseConfigurationRecord))
0000000016aeeaf0 000007feecb18d36 (MethodDesc 000007feec99bc38 +0x86 System.Web.ApplicationImpersonationContext..ctor())
0000000016aeeb50 000007feecbab930 (MethodDesc 000007feec93acc8 +0x160 System.Web.Caching.CacheEntry.CallCacheItemRemovedCallback(System.Web.Caching.CacheItemRemovedCallback, System.Web.Caching.CacheItemRemovedReason))
0000000016aeeb70 000007feecbaae55 (MethodDesc 000007feec99e5a8 +0x75 System.Web.Caching.CacheDependency.DisposeInternal())
0000000016aeeba0 000007feecbac11d (MethodDesc 000007feec93cb88 +0x9d System.Web.Caching.CacheDependency.NotifyDependencyChanged(System.Object, System.EventArgs))
0000000016aeebf0 000007feecbaad3b (MethodDesc 000007feec93ace8 +0x16b System.Web.Caching.CacheEntry.Close(System.Web.Caching.CacheItemRemovedReason))
0000000016aeec70 000007feecb1538e (MethodDesc 000007feec99a9b0 +0x6fe System.Web.Caching.CacheSingle.UpdateCache(System.Web.Caching.CacheKey, System.Web.Caching.CacheEntry, Boolean, System.Web.Caching.CacheItemRemovedReason, System.Object ByRef))
0000000016aeed40 000007feecb14bdd (MethodDesc 000007feec99a248 +0x2d System.Web.Caching.CacheInternal.DoRemove(System.Web.Caching.CacheKey, System.Web.Caching.CacheItemRemovedReason))
0000000016aeed90 000007feecb4361d (MethodDesc 000007feec99ac80 +0x42d System.Web.Caching.ExpiresBucket.FlushExpiredItems(System.DateTime, Boolean))
0000000016aeee90 000007feecb43196 (MethodDesc 000007feec99aa68 +0x146 System.Web.Caching.CacheExpires.FlushExpiredItems(Boolean, Boolean))
0000000016aeeef0 000007fef8371839 (MethodDesc 000007fef807cd28 +0x9 System.Threading.Thread.get_CurrentThread())
0000000016aeef20 000007fef83717ec (MethodDesc 000007fef8090a70 +0xdc System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean))
0000000016aeef40 000007fef83ec8ec (MethodDesc 000007fef8090ac8 +0x7c System.Threading.ExecutionContext.CreateCopy())
0000000016aeef80 000007fef83ecfa7 (MethodDesc 000007fef8098b30 +0x97 System.Threading._TimerCallback.PerformTimerCallback(System.Object))
0000000016aef230 000007feed2ab8f4 (MethodDesc 000007feec9ec4c0 +0x6f4 System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32))
0000000016aef4a0 000007feed2a9ef1 (MethodDesc 000007feec9d2dc8 +0x51 DomainNeutralILStubClass.IL_STUB_ReversePInvoke(Int64, Int64, Int64, Int32))
DERIVED_WAIT_CHAIN:
Dl Eid Cid WaitType
-- --- ------- --------------------------
0 1414.168c Speculated (Triage) -->
34 1414.1ca4 Unknown
WAIT_CHAIN_COMMAND: ~0s;k;;~34s;k;;
BLOCKING_THREAD: 0000000000001ca4
DEFAULT_BUCKET_ID: APPLICATION_HANG_BusyHang
PRIMARY_PROBLEM_CLASS: APPLICATION_HANG_BusyHang
LAST_CONTROL_TRANSFER: from 000007fef951579e to 000007fef95155e1
STACK_TEXT:
00000000`0850f4c0 000007fe`f951579e : 00000000`03735c20 00000002`6f7f8e08 00000001`7f3ce748 00000000`107bdf08 : clr!SVR::gc_heap::mark_object_simple1+0x458
00000000`0850f560 000007fe`f9513745 : 00000000`03735c20 000007fe`ecc2d808 00000000`00000002 000007fe`ecc2d808 : clr!SVR::gc_heap::mark_object_simple+0x4d7
00000000`0850f5f0 000007fe`f9418987 : 00000001`7f3ce748 00000000`03735c20 00000000`201617f8 0000e5b3`06a4c486 : clr!SVR::GCHeap::Promote+0x161
00000000`0850f670 000007fe`f9418c77 : 00000000`201617f8 000007fe`f9418940 ffffffff`fffffe00 00000000`20161800 : clr!CalculateSizedRefSize+0x47
00000000`0850f6a0 000007fe`f9418be1 : 00000000`000000c0 00000000`00000001 00000000`00000003 00000000`0850f728 : clr!ScanConsecutiveHandlesWithUserData+0x67
00000000`0850f6e0 000007fe`f950dcb2 : 00000000`20160000 000007fe`f9418b88 00000000`00000003 00000000`0370d0b0 : clr!BlockScanBlocksWithUserData+0x59
00000000`0850f720 000007fe`f950d275 : 00000000`0850f8a0 00000000`0850f910 000007fe`f9418b88 00000000`0850f910 : clr!TableScanHandles+0x219
00000000`0850f7e0 000007fe`f9418ac8 : 00000000`00000002 00000000`00000008 00000000`00000008 00000007`ff316000 : clr!HndScanHandlesForGC+0x1ad
00000000`0850f890 000007fe`f95934c6 : 00000000`03735c20 000007fe`f95134b0 00000000`00000002 00000000`00000008 : clr!ScanSizedRefByAD+0xf8
00000000`0850f930 000007fe`f9511a43 : 00000000`03735c20 00000000`00000002 00000000`03735c20 000007fe`00000001 : clr!SVR::gc_heap::mark_phase+0x19c
00000000`0850f9c0 000007fe`f9512632 : 00000005`24fe3bc1 00000000`00000000 00000000`037363f8 00000000`03735c20 : clr!SVR::gc_heap::gc1+0x54
00000000`0850fa30 000007fe`f9511758 : 00000000`00000000 00000000`01120f30 00000000`01680000 00000000`00000000 : clr!SVR::gc_heap::garbage_collect+0x372
00000000`0850fac0 000007fe`f958a0cb : 00000000`0000406b 00000000`03735c20 00000000`0850fd40 00000000`00000000 : clr!SVR::gc_heap::gc_thread_function+0x78
00000000`0850fb10 00000000`7728652d : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : clr!SVR::gc_heap::gc_thread_stub+0x82
00000000`0850fd60 00000000`7771c521 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd
00000000`0850fd90 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x1d
FOLLOWUP_IP:
clr!SVR::gc_heap::gc_thread_stub+82
000007fe`f958a0cb cc int 3
SYMBOL_STACK_INDEX: d
SYMBOL_NAME: clr!SVR::gc_heap::gc_thread_stub+82
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: clr
IMAGE_NAME: clr.dll
DEBUG_FLR_IMAGE_TIMESTAMP: 4e1822f4
STACK_COMMAND: ~34s ; kb
BUCKET_ID: X64_HANG_clr!SVR::gc_heap::gc_thread_stub+82
FAILURE_BUCKET_ID: APPLICATION_HANG_BusyHang_cfffffff_clr.dll!SVR::gc_heap::gc_thread_stub
WATSON_STAGEONE_URL: http://watson.microsoft.com/00000000.htm?Retriage=1
Followup: MachineOwner
---------
> !clrstack
OS Thread Id: 0x42ec (221)
Child SP IP Call Site
0000000016aee998 00000000777418ca [HelperMethodFrame_1OBJ: 0000000016aee998] System.Threading.ReaderWriterLock.AcquireWriterLockInternal(Int32)
0000000016aeeac0 000007fef49b6f57 System.Configuration.Internal.InternalConfigRoot.AcquireHierarchyLockForWrite()
0000000016aeeaf0 000007fef49c601e System.Configuration.Internal.InternalConfigRoot.RemoveConfigImpl(System.String, System.Configuration.BaseConfigurationRecord)
0000000016aeeb60 000007feecbab930 System.Web.Caching.CacheEntry.CallCacheItemRemovedCallback(System.Web.Caching.CacheItemRemovedCallback, System.Web.Caching.CacheItemRemovedReason)
0000000016aeec00 000007feecbaad3b System.Web.Caching.CacheEntry.Close(System.Web.Caching.CacheItemRemovedReason)
0000000016aeec80 000007feecb1538e System.Web.Caching.CacheSingle.UpdateCache(System.Web.Caching.CacheKey, System.Web.Caching.CacheEntry, Boolean, System.Web.Caching.CacheItemRemovedReason, System.Object ByRef)
0000000016aeed50 000007feecb14bdd System.Web.Caching.CacheInternal.DoRemove(System.Web.Caching.CacheKey, System.Web.Caching.CacheItemRemovedReason)
0000000016aeeda0 000007feecb4361d System.Web.Caching.ExpiresBucket.FlushExpiredItems(System.DateTime, Boolean)
0000000016aeeea0 000007feecb43196 System.Web.Caching.CacheExpires.FlushExpiredItems(Boolean, Boolean)
0000000016aeef30 000007fef83717ec System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
0000000016aeef90 000007fef83ecfa7 System.Threading._TimerCallback.PerformTimerCallback(System.Object)
0000000016aef208 000007fef9399714 [GCFrame: 0000000016aef208]
0000000016aef3e0 000007fef9399714 [DebuggerU2MCatchHandlerFrame: 0000000016aef3e0]
0000000016aef5b8 000007fef9399714 [ContextTransitionFrame: 0000000016aef5b8]
0000000016aef7a0 000007fef9399714 [DebuggerU2MCatchHandlerFrame: 0000000016aef7a0]
> !syncblk
Index SyncBlock MonitorHeld Recursion Owning Thread Info SyncBlock Owner
7906 0000000015d167c8 1 1 000000000fdbee90 405c 270 000000010f37d138 System.Dynamic.Utils.CacheDict`2[[System.Type, mscorlib],[System.Reflection.MethodInfo, mscorlib]]
8144 00000000153c3038 3 1 0000000015e0f1f0 4338 228 000000021f79e8b0 System.Web.CachedPathData
26403 00000000154b5e58 5 1 0000000010bdb640 42b8 119 00000001cf83a158 System.Web.CachedPathData
26600 000000000fd0e0d8 3 1 000000001d006e60 403c 311 000000025f712b40 System.Web.CachedPathData
26677 000000001519c558 3 1 000000001eff0540 36e8 327 000000020f664fb8 System.Web.CachedPathData
27056 000000001519f428 5 1 000000001c862340 34e0 294 000000018f5fd5b8 System.Object
27174 000000000ce4b628 1 1 000000000fe5c830 464c 212 00000001ff6ed2a8 System.Web.DirectoryMonitor
27227 00000000107207d8 3 1 000000001f9b0cb0 47b4 260 000000016f85dcb8 System.Web.CachedPathData
27426 000000000c9ef2e8 3 1 000000000cbd3ff0 4058 131 00000001ff5a2ce8 System.Web.CachedPathData
27677 000000000ccee958 3 1 0000000015fa5d10 3b78 236 000000015f681dc8 System.Web.CachedPathData
27680 000000000ccd9588 3 1 00000000159aa750 4200 180 000000019fa2b008 System.Web.CachedPathData
27728 000000000c804c98 3 1 00000000159aae60 4568 211 00000001ff576860 System.Web.CachedPathData
27831 000000000a2d2a58 3 1 000000000cba4df0 43cc 127 00000000ff6f45a0 System.Web.CachedPathData
28088 00000000159b9688 5 1 000000001d139d30 3c40 177 000000023f887808 System.Web.CachedPathData
28491 00000000102d2fb8 7 1 000000000cacd460 411c 150 000000010f697cc8 System.Web.CachedPathData
28637 000000000a2d5f88 9 1 000000001ca9e8e0 41a8 130 000000024f6be1e8 System.Web.CachedPathData
28672 000000000c8675f8 3 1 000000000cbc38e0 40c4 151 000000018f481828 System.Web.CachedPathData
-----------------------------
Total 29135
CCW 2
RCW 2
ComClassFactory 0
Free 22330
> !threadpool
CPU utilization: 74%
Worker Thread: Total: 196 Running: 196 Idle: 0 MaxLimit: 2400 MinLimit: 24
Work Request in Queue: 32
Unknown Function: 000007feefe898e0 Context: 00000000109e2d10
Unknown Function: 000007feefe898e0 Context: 000000001d346680
AsyncTimerCallbackCompletion TimerInfo@0000000010a41d90
AsyncTimerCallbackCompletion TimerInfo@000000001cdeeb60
AsyncTimerCallbackCompletion TimerInfo@000000001f2c9860
Unknown Function: 000007feefe898e0 Context: 000000001ed65ad0
Unknown Function: 000007feefe898e0 Context: 000000000a1bc1c0
Unknown Function: 000007feefe898e0 Context: 000000001ef443e0
Unknown Function: 000007feefe898e0 Context: 0000000015410af0
Unknown Function: 000007feefe898e0 Context: 000000000fd96330
Unknown Function: 000007feefe898e0 Context: 000000001d624860
Unknown Function: 000007feefe898e0 Context: 000000000fc6e500
Unknown Function: 000007feefe898e0 Context: 0000000015b8e110
Unknown Function: 000007feefe898e0 Context: 00000000158dc6b0
Unknown Function: 000007feefe898e0 Context: 000000001f1ab600
Unknown Function: 000007feefe898e0 Context: 000000000cf05e38
Unknown Function: 000007feefe898e0 Context: 000000001d0b1c50
AsyncTimerCallbackCompletion TimerInfo@0000000003849290
Unknown Function: 000007feefe898e0 Context: 000000001c926f10
Unknown Function: 000007feefe898e0 Context: 000000001d472c80
Unknown Function: 000007feefe898e0 Context: 000000000cf15af0
Unknown Function: 000007feefe898e0 Context: 000000001f5b00c0
Unknown Function: 000007feefe898e0 Context: 000000000a022fa0
Unknown Function: 000007feefe898e0 Context: 000000001049d2e0
Unknown Function: 000007feefe898e0 Context: 00000000105e9370
AsyncTimerCallbackCompletion TimerInfo@000000000c985cd0
Unknown Function: 000007feefe898e0 Context: 000000001d376960
Unknown Function: 000007feefe898e0 Context: 000000001ee3f0d0
Unknown Function: 000007feefe898e0 Context: 000000001ee325b0
Unknown Function: 000007feefe898e0 Context: 0000000015f726b0
Unknown Function: 000007feefe898e0 Context: 0000000015598480
Unknown Function: 000007feefe898e0 Context: 000000000ce2a8a0
--------------------------------------
Number of Timers: 80
--------------------------------------
Completion Port Thread:Total: 5 Free: 3 MaxFree: 48 CurrentLimit: 5 MaxLimit: 2400 MinLimit: 24
最佳答案
好的，发现并解决了问题。
这个周末有人把我指向this Server Fault question。这似乎是合理的，通过路由模块发送所有请求肯定会导致性能问题。
看完其他文章后，我意识到这是一个配置问题。我们正在通过所有托管模块发送所有请求:
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>
设置为 false ，我们的Web应用程序现在表现正常。
@Aristos:即使我没有跟进您的建议，也感谢您的考虑。
关于asp.net - 将IIS从经典模式切换到集成模式时，锁定并占用大量CPU，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9191639/