分析案例：应用服务器W3WP进程CPU持续超过百分之九十（Oracle客户端Bug）

  75:ef2c       0 days 2:06:17.155
  67:198ac      0 days 1:54:59.175
  76:1afe4      0 days 1:41:53.460
  20:19f0c      0 days 0:04:41.145

OS Thread Id: 0x13fdc (60)

        Child SP               IP Call Site
0000000030c9dcc8 00000000779cd3fa [InlinedCallFrame: 0000000030c9dcc8] System.Exception.GetMessageFromNativeResources(ExceptionMessageKind, System.Runtime.CompilerServices.StringHandleOnStack)
0000000030c9dcc8 000007fef86e5aca [InlinedCallFrame: 0000000030c9dcc8] System.Exception.GetMessageFromNativeResources(ExceptionMessageKind, System.Runtime.CompilerServices.StringHandleOnStack)
0000000030c9dca0 000007fef86e5aca *** WARNING: Unable to verify checksum for mscorlib.ni.dll
System.Threading.ThreadAbortException..ctor()
0000000030c9df40 000007fef974a7f3 [GCFrame: 0000000030c9df40] 
0000000030c9dfc8 000007fef974a7f3 [GCFrame: 0000000030c9dfc8] 
0000000030c9e130 000007fef974a7f3 [GCFrame: 0000000030c9e130] 
0000000030c9e5c8 000007fef974a7f3 [HelperMethodFrame: 0000000030c9e5c8] 
0000000030c9e6f0 000007fe9a1774fa *** ERROR: Module load completed but symbols could not be loaded for Oracle.DataAccess.dll
Oracle.DataAccess.Client.OracleTuningAgent.DoScan()
0000000030c9e740 000007fe9a1688e5 Oracle.DataAccess.Client.OracleTuningAgent.TuningFunction()
0000000030c9e7c0 000007fef86339a5 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
0000000030c9e920 000007fef8633719 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
0000000030c9e950 000007fef86336f7 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
0000000030c9e9a0 000007fef864adc1 System.Threading.ThreadHelper.ThreadStart()
0000000030c9ecb8 000007fef974a7f3 [GCFrame: 0000000030c9ecb8] 
0000000030c9f008 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 0000000030c9f008] 
0000000030c9f198 000007fef974a7f3 [ContextTransitionFrame: 0000000030c9f198] 
0000000030c9f3b8 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 0000000030c9f3b8] 
OS Thread Id: 0x20bd4 (61)
        Child SP               IP Call Site
00000000031bdc58 00000000779cd96a [HelperMethodFrame: 00000000031bdc58] System.AppDomain.nUnload(Int32)
00000000031bdd50 000007fef8e3e892 System.AppDomain.Unload(System.AppDomain)
00000000031bddb0 000007fef4b0c4a2 *** WARNING: Unable to verify checksum for System.Web.ni.dll
System.Web.HttpRuntime.ReleaseResourcesAndUnloadAppDomain(System.Object)
00000000031bde30 000007fef86339a5 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
00000000031bdf90 000007fef8633719 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
00000000031bdfc0 000007fef866216f System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
00000000031be010 000007fef866136a System.Threading.ThreadPoolWorkQueue.Dispatch()
00000000031be578 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 00000000031be578] 
00000000031be708 000007fef974a7f3 [ContextTransitionFrame: 00000000031be708] 
00000000031be928 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 00000000031be928] 
OS Thread Id: 0x3314 (62)

        Child SP               IP Call Site
0000000003bee5b8 00000000779cd3fa [HelperMethodFrame: 0000000003bee5b8] 
0000000003bee6e0 000007fe9a1774fa Oracle.DataAccess.Client.OracleTuningAgent.DoScan()
0000000003bee730 000007fe9a1688e5 Oracle.DataAccess.Client.OracleTuningAgent.TuningFunction()
0000000003bee7b0 000007fef86339a5 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
0000000003bee910 000007fef8633719 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
0000000003bee940 000007fef86336f7 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
0000000003bee990 000007fef864adc1 System.Threading.ThreadHelper.ThreadStart()
0000000003beeca8 000007fef974a7f3 [GCFrame: 0000000003beeca8] 
0000000003beeff8 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 0000000003beeff8] 
0000000003bef188 000007fef974a7f3 [ContextTransitionFrame: 0000000003bef188] 
0000000003bef3a8 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 0000000003bef3a8] 
OS Thread Id: 0xa130 (63)
        Child SP               IP Call Site
0000000003ecdc48 00000000779cd96a [HelperMethodFrame: 0000000003ecdc48] System.AppDomain.nUnload(Int32)
0000000003ecdd40 000007fef8e3e892 System.AppDomain.Unload(System.AppDomain)
0000000003ecdda0 000007fef4b0c4a2 System.Web.HttpRuntime.ReleaseResourcesAndUnloadAppDomain(System.Object)
0000000003ecde20 000007fef86339a5 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
0000000003ecdf80 000007fef8633719 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
0000000003ecdfb0 000007fef866216f System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
0000000003ece000 000007fef866136a System.Threading.ThreadPoolWorkQueue.Dispatch()
0000000003ece568 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 0000000003ece568] 
0000000003ece6f8 000007fef974a7f3 [ContextTransitionFrame: 0000000003ece6f8] 
0000000003ece918 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 0000000003ece918] 
OS Thread Id: 0xe0c (64)
        Child SP               IP Call Site
000000000528e918 00000000779cd3fa [HelperMethodFrame: 000000000528e918] 
000000000528ea40 000007fe9a1774fa Oracle.DataAccess.Client.OracleTuningAgent.DoScan()
000000000528ea90 000007fe9a1688e5 Oracle.DataAccess.Client.OracleTuningAgent.TuningFunction()
000000000528eb10 000007fef86339a5 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
000000000528ec70 000007fef8633719 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
000000000528eca0 000007fef86336f7 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
000000000528ecf0 000007fef864adc1 System.Threading.ThreadHelper.ThreadStart()
000000000528f008 000007fef974a7f3 [GCFrame: 000000000528f008] 
000000000528f358 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 000000000528f358] 
000000000528f4e8 000007fef974a7f3 [ContextTransitionFrame: 000000000528f4e8] 
000000000528f708 000007fef974a7f3 [DebuggerU2MCatchHandlerFrame: 000000000528f708]

其他注意事项：

      经查触发这个bug的代码时BulkCopy，使用Oracle的BulkCopy还是要慎用。

参考信息：

http://www.cnblogs.com/zhaoguan_wang/p/5505751.html

http://www.cnblogs.com/xling/p/4347165.html

分析案例：应用服务器W3WP进程CPU持续超过百分之九十（Oracle客户端Bug）

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