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
- GridViewColumnCollection.cs
- WmfPlaceableFileHeader.cs
- OperationCanceledException.cs
- TextRange.cs
- MetadataPropertyAttribute.cs
- Evidence.cs
- DataSet.cs
- SectionXmlInfo.cs
- WindowsRichEdit.cs
- AsymmetricSignatureDeformatter.cs
- TrackBarDesigner.cs
- TrackingMemoryStream.cs
- TableRowCollection.cs
- CodeStatementCollection.cs
- MaskPropertyEditor.cs
- AjaxFrameworkAssemblyAttribute.cs
- SQLRoleProvider.cs
- WebControlAdapter.cs
- XomlCompilerError.cs
- XmlEntityReference.cs
- WorkflowMarkupSerializerMapping.cs
- XmlNotation.cs
- TableLayoutStyle.cs
- EpmCustomContentDeSerializer.cs
- VirtualPathUtility.cs
- EventRecordWrittenEventArgs.cs
- WsatConfiguration.cs
- cookie.cs
- WebPartTransformerCollection.cs
- CodeMemberField.cs
- NonClientArea.cs
- FragmentQueryKB.cs
- BitArray.cs
- EmptyEnumerator.cs
- ObjectMemberMapping.cs
- Storyboard.cs
- wgx_sdk_version.cs
- GPRECTF.cs
- ActivityDesignerAccessibleObject.cs
- SecureUICommand.cs
- XamlToRtfWriter.cs
- CurrencyWrapper.cs
- IndexedWhereQueryOperator.cs
- DataGridViewAdvancedBorderStyle.cs
- LongTypeConverter.cs
- CodeTypeParameterCollection.cs
- CompilerState.cs
- ObjectSecurity.cs
- ContextMarshalException.cs
- Attribute.cs
- ParameterToken.cs
- AppSettingsReader.cs
- ClientSettingsSection.cs
- CannotUnloadAppDomainException.cs
- PixelShader.cs
- MarkedHighlightComponent.cs
- AuthenticationException.cs
- DoubleStorage.cs
- SubtreeProcessor.cs
- AutoCompleteStringCollection.cs
- ByteStack.cs
- ProtocolsSection.cs
- DBConnectionString.cs
- XmlUtf8RawTextWriter.cs
- DurableMessageDispatchInspector.cs
- ClipboardData.cs
- XmlnsCache.cs
- List.cs
- Image.cs
- PolicyUnit.cs
- WindowsNonControl.cs
- XmlSerializationGeneratedCode.cs
- XmlSchemaDatatype.cs
- BinaryObjectInfo.cs
- StrongNameKeyPair.cs
- _ChunkParse.cs
- GradientStop.cs
- CodeObjectCreateExpression.cs
- PrintDocument.cs
- HtmlElement.cs
- TableColumnCollectionInternal.cs
- BaseTemplateCodeDomTreeGenerator.cs
- RequestResizeEvent.cs
- URL.cs
- FormsAuthentication.cs
- DataControlField.cs
- ArgumentOutOfRangeException.cs
- InternalTransaction.cs
- CodeCompileUnit.cs
- Encoder.cs
- UInt16Converter.cs
- GradientBrush.cs
- FirewallWrapper.cs
- PrintPreviewControl.cs
- Matrix3D.cs
- IOException.cs
- BeginEvent.cs
- NullableConverter.cs
- AppLevelCompilationSectionCache.cs
- TabPage.cs