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我有非常奇怪的网络服务问题。安装如下：在IIS7（win2008）下部署在x64单核，1gb ram机器上的6个Web服务，每个运行在专用应用程序池中。 Web服务通过LB连接到一个mysql集群。我们正在使用mysql odbc连接器5.1.6，连接池为.net v3.5。构建目标平台x64。大约每3个小时，一个网络服务开始占用100％的CPU（或者更好地说100％的CPU核心，但是因为它是单核心机器，它将是100％的CPU）。同时mysql服务器空闲。从任务管理器中“挂起”w3wp无效，IIS重新启动有帮助。我期待在进程管理器，看看里面的w3wp一个奇怪的线程与以下堆栈跟踪，这是我无法理解：asp.net网络服务高CPU使用率
ntoskrnl.exe!IoAcquireRemoveLockEx+0xe7
ntoskrnl.exe!memset+0x22a
ntoskrnl.exe!KeWaitForSingleObject+0x2cb
ntoskrnl.exe!KeDetachProcess+0x120d
ntoskrnl.exe!PsReturnProcessNonPagedPoolQuota+0x3a3
ntoskrnl.exe!CcSetDirtyPinnedData+0x433
myodbc5.dll!SQLTablePrivilegesW+0x22dac
myodbc5.dll!SQLTablePrivilegesW+0x2bffd
myodbc5.dll!SQLTablePrivilegesW+0x107ea
odbc32.dll!SQLAllocHandle+0xba5
odbc32.dll!SQLAllocHandle+0x9c8
mscorwks.dll!IEE+0xa913
System.Data.ni.dll+0x56f8c3
System.Data.ni.dll+0x5c1efe
mscorwks.dll!IEE+0xb0ee
mscorwks.dll!CompareAssemblyIdentity+0x2bb8f
mscorwks.dll!CompareAssemblyIdentity+0x39deb
mscorwks.dll!CompareAssemblyIdentity+0xe63d
mscorwks.dll!CertCreateAuthenticodeLicense+0x21b12f
mscorwks.dll!StrongNameTokenFromPublicKey+0x49f7
mscorwks.dll!PreBindAssembly+0x88a46
mscorlib.ni.dll+0x3988d0
mscorlib.ni.dll+0x39877a
mscorwks.dll!IEE+0xb042
mscorwks.dll!CompareAssemblyIdentity+0x2610d
mscorwks.dll!CompareAssemblyIdentity+0x26358
mscorwks.dll!CompareAssemblyIdentity+0x2ae50
mscorwks.dll!CompareAssemblyIdentity+0x97ad7
mscorwks.dll!CompareAssemblyIdentity+0x97877
mscorwks.dll!CopyPDBs+0x170f3
mscorwks.dll!InitializeFusion+0x5994
mscorwks.dll!GetMetaDataInternalInterfaceFromPublic+0x34ad9
mscorwks.dll!InitializeFusion+0x1282d
mscorwks.dll!CorExitProcess+0x802d
mscorwks.dll!InitializeFusion+0xb5db
mscorwks.dll!CertCreateAuthenticodeLicense+0x240021
mscorwks.dll!CompareAssemblyIdentity+0x97bcc
mscorwks.dll!CompareAssemblyIdentity+0x97877
mscorwks.dll!CreateAssemblyNameObject+0x2c29d
mscorwks.dll!InitializeFusion+0x5994
mscorwks.dll!GetMetaDataInternalInterfaceFromPublic+0x34ad9
mscorwks.dll!InitializeFusion+0x1282d
mscorwks.dll!StrongNameErrorInfo+0x130fe
mscorwks.dll!InitializeFusion+0xbf48
mscorwks.dll!StrongNameErrorInfo+0x76b0
kernel32.dll!BaseThreadInitThunk+0xd
ntdll.dll!RtlUserThreadStart+0x21
我也能再现那些具有VS2010部署在另一台机器上同样的问题并能够连接到“挂” W3WP，看到GC终结线程坐在一起类似下面的一个堆栈跟踪：
[Native to Managed Transition]
System.Data.dll!System.Data.Odbc.OdbcHandle.ReleaseHandle()
[Native to Managed Transition]
[Managed to Native Transition]
mscorlib.dll!System.Runtime.InteropServices.SafeHandle.Dispose(bool disposing)
mscorlib.dll!System.Runtime.InteropServices.SafeHandle.Finalize()
[Appdomain Transition]
还有一堆栈跟踪存在，我相信这是第一个的反射最后。
my_SQLFreeStmtExtended strmov Highest
myodbc5.dll!strmov(char * dst, const char * src) Line 38 + 0xd bytes
myodbc5.dll!cli_safe_read(st_mysql * mysql) Line 731
myodbc5.dll!cli_read_query_result(st_mysql * mysql) Line 2739 + 0x8 bytes
myodbc5.dll!mysql_next_result(st_mysql * mysql) Line 5221 + 0xd bytes
myodbc5.dll!my_SQLFreeStmtExtended(void * hstmt, unsigned short fOption, unsigned int clearAllResults) Line 427 + 0xc bytes
odbc32.dll!000007fef1d43ee9()
[Frames below may be incorrect and/or missing, no symbols loaded for odbc32.dll]
odbc32.dll!000007fef1d43d3e()
mscorwks.dll!000007fef102cd27()
System.Data.ni.dll!000007feebe73ad3()
这个问题在生产16核心机器上显然也是可重现的。 我们已经执行代码审查，并在我们可能可能遗留连接未关闭且未处置的地方修复/重写代码。 我会感谢这个问题的任何帮助，并接受任何建议，我还能看到什么。