Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / SqlClient / SqlStatistics.cs / 1 / SqlStatistics.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Collections; using System.Data.Common; using System.Diagnostics; namespace System.Data.SqlClient { internal sealed class SqlStatistics { static internal SqlStatistics StartTimer(SqlStatistics statistics) { if ((null != statistics) && !statistics.RequestExecutionTimer()) { // we're re-entrant -- don't bother. statistics = null; } return statistics; } static internal void StopTimer(SqlStatistics statistics) { if (null != statistics) { statistics.ReleaseAndUpdateExecutionTimer(); } } // internal values that are not exposed through properties internal long _closeTimestamp; internal long _openTimestamp; internal long _startExecutionTimestamp; internal long _startFetchTimestamp; internal long _startNetworkServerTimestamp; // internal values that are exposed through properties internal long _buffersReceived; internal long _buffersSent; internal long _bytesReceived; internal long _bytesSent; internal long _connectionTime; internal long _cursorOpens; internal long _executionTime; internal long _iduCount; internal long _iduRows; internal long _networkServerTime; internal long _preparedExecs; internal long _prepares; internal long _selectCount; internal long _selectRows; internal long _serverRoundtrips; internal long _sumResultSets; internal long _transactions; internal long _unpreparedExecs; // these flags are required if statistics is turned on/off in the middle of command execution private bool _waitForDoneAfterRow; private bool _waitForReply; internal bool WaitForDoneAfterRow { get { return _waitForDoneAfterRow; } set { _waitForDoneAfterRow = value; } } internal bool WaitForReply { get { return _waitForReply; } } internal SqlStatistics () { } internal void ContinueOnNewConnection() { _startExecutionTimestamp = 0; _startFetchTimestamp = 0; _waitForDoneAfterRow = false; _waitForReply = false; } internal IDictionary GetHashtable() { Hashtable ht = new Hashtable(); ht.Add("BuffersReceived", _buffersReceived); ht.Add("BuffersSent", _buffersSent); ht.Add("BytesReceived", _bytesReceived); ht.Add("BytesSent", _bytesSent); ht.Add("CursorOpens", _cursorOpens); ht.Add("IduCount", _iduCount); ht.Add("IduRows", _iduRows); ht.Add("PreparedExecs", _preparedExecs); ht.Add("Prepares", _prepares); ht.Add("SelectCount", _selectCount); ht.Add("SelectRows", _selectRows); ht.Add("ServerRoundtrips", _serverRoundtrips); ht.Add("SumResultSets", _sumResultSets); ht.Add("Transactions", _transactions); ht.Add("UnpreparedExecs", _unpreparedExecs); ht.Add ("ConnectionTime", ADP.TimerToMilliseconds(_connectionTime)); ht.Add ("ExecutionTime", ADP.TimerToMilliseconds(_executionTime)); ht.Add ("NetworkServerTime", ADP.TimerToMilliseconds(_networkServerTime)); return ht; } internal bool RequestExecutionTimer () { if (_startExecutionTimestamp == 0) { ADP.TimerCurrent(out _startExecutionTimestamp); return true; } return false; } internal void RequestNetworkServerTimer () { Debug.Assert(_startExecutionTimestamp!=0, "No network time expected outside execution period"); if (_startNetworkServerTimestamp == 0) { ADP.TimerCurrent(out _startNetworkServerTimestamp); } _waitForReply = true; } internal void ReleaseAndUpdateExecutionTimer () { long stopExecutionTimestamp; if (_startExecutionTimestamp > 0) { ADP.TimerCurrent(out stopExecutionTimestamp); _executionTime += (stopExecutionTimestamp - _startExecutionTimestamp); _startExecutionTimestamp = 0; } } internal void ReleaseAndUpdateNetworkServerTimer () { long stopNetworkServerTimestamp; if (_waitForReply && _startNetworkServerTimestamp > 0) { ADP.TimerCurrent(out stopNetworkServerTimestamp); _networkServerTime += (stopNetworkServerTimestamp - _startNetworkServerTimestamp); _startNetworkServerTimestamp = 0; } _waitForReply = false; } internal void Reset() { _buffersReceived = 0; _buffersSent = 0; _bytesReceived = 0; _bytesSent = 0; _connectionTime = 0; _cursorOpens = 0; _executionTime = 0; _iduCount = 0; _iduRows = 0; _networkServerTime = 0; _preparedExecs = 0; _prepares = 0; _selectCount = 0; _selectRows = 0; _serverRoundtrips = 0; _sumResultSets = 0; _transactions = 0; _unpreparedExecs = 0; _waitForDoneAfterRow = false; _waitForReply = false; _startExecutionTimestamp = 0; _startNetworkServerTimestamp = 0; } internal void SafeAdd (ref long value, long summand) { if (long.MaxValue - value > summand) { value += summand; } else { value = long.MaxValue; } } internal long SafeIncrement(ref long value) { if (value < long.MaxValue) value++; return value; } internal void UpdateStatistics() { // update connection time if (_closeTimestamp >= _openTimestamp) { SafeAdd(ref _connectionTime, _closeTimestamp - _openTimestamp); } else { _connectionTime = long.MaxValue; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- BinaryObjectWriter.cs
- DBDataPermission.cs
- AQNBuilder.cs
- UniformGrid.cs
- FormatterConverter.cs
- BigInt.cs
- Operand.cs
- GroupBox.cs
- List.cs
- WindowsUpDown.cs
- WebControl.cs
- Baml6Assembly.cs
- DbParameterCollection.cs
- TemplateBindingExtension.cs
- DetailsViewRowCollection.cs
- MarginsConverter.cs
- BigInt.cs
- AssemblyResourceLoader.cs
- ParameterCollection.cs
- RegisteredExpandoAttribute.cs
- PnrpPeerResolver.cs
- ArrayTypeMismatchException.cs
- PrintDialog.cs
- HtmlImageAdapter.cs
- Sentence.cs
- ConstrainedDataObject.cs
- PerfProviderCollection.cs
- TableLayoutPanelCodeDomSerializer.cs
- ZoomPercentageConverter.cs
- SqlTopReducer.cs
- StandardOleMarshalObject.cs
- ExpressionBuilderCollection.cs
- TrustManagerMoreInformation.cs
- Trace.cs
- SetterBase.cs
- Floater.cs
- TableRow.cs
- CodeSnippetCompileUnit.cs
- ValidationEventArgs.cs
- BreakRecordTable.cs
- RestHandlerFactory.cs
- KernelTypeValidation.cs
- GridPattern.cs
- DataBinding.cs
- UInt32.cs
- AuthenticateEventArgs.cs
- AudioFormatConverter.cs
- WebPartUserCapability.cs
- WebProxyScriptElement.cs
- _NetworkingPerfCounters.cs
- ClientTargetCollection.cs
- TextDataBindingHandler.cs
- CRYPTPROTECT_PROMPTSTRUCT.cs
- DateTimeConverter.cs
- AvTraceFormat.cs
- BaseAsyncResult.cs
- OpCopier.cs
- EntityDataSource.cs
- ALinqExpressionVisitor.cs
- RequestCacheManager.cs
- XmlEncodedRawTextWriter.cs
- XmlUtf8RawTextWriter.cs
- MaskedTextBox.cs
- ObjectSet.cs
- AmbientProperties.cs
- GridErrorDlg.cs
- BaseTransportHeaders.cs
- CodeConditionStatement.cs
- ZoneIdentityPermission.cs
- SerializerWriterEventHandlers.cs
- ScriptManager.cs
- SizeAnimationClockResource.cs
- QueryOptionExpression.cs
- WebDisplayNameAttribute.cs
- XmlAttributeOverrides.cs
- HtmlTableCell.cs
- AddingNewEventArgs.cs
- DocobjHost.cs
- DependencyPropertyDescriptor.cs
- __Filters.cs
- ResXResourceSet.cs
- PreProcessor.cs
- StreamUpdate.cs
- ExceptionHandlersDesigner.cs
- HwndSourceParameters.cs
- GeometryValueSerializer.cs
- DirectoryObjectSecurity.cs
- CommonDialog.cs
- TimeSpanOrInfiniteConverter.cs
- OptimalBreakSession.cs
- EncodingInfo.cs
- FileAuthorizationModule.cs
- Section.cs
- ChannelCredentials.cs
- IntSecurity.cs
- BrowsableAttribute.cs
- OdbcConnection.cs
- ValueSerializerAttribute.cs
- WSDualHttpSecurityElement.cs
- ExtensionWindowHeader.cs