public void PublishNormalizedStatementRelationStatistics(LogEntryStatementRelationStatisticsData relationStatisticsData)
{
var key = relationStatisticsData.NormalizedStatementFingerprint;
var sample = new NormalizedStatementRelationStatistics()
{
AvgTotalCost = relationStatisticsData.TotalCost,
CreatedDate = DateTime.Now,
DatabaseID = relationStatisticsData.DatabaseID,
Date = relationStatisticsData.ExecutionDate,
RelationID = relationStatisticsData.RelationID,
MaxTotalCost = relationStatisticsData.TotalCost,
MinTotalCost = relationStatisticsData.TotalCost,
TotalScansCount = 1
};
lock (lockObject)
{
if (!statementRelationStatistics.ContainsKey(key))
{
statementRelationStatistics.Add(key, new NormalizedStatementRelationStatisticsSampler(dateTimeSelector, null));
}
}
lock (String.Intern(key))
{
statementRelationStatistics[key].AddSample(sample);
}
}
public static void ApplySample(NormalizedStatementRelationStatistics cumulativeData, NormalizedStatementRelationStatistics newSample)
{
cumulativeData.MaxTotalCost = Math.Max(cumulativeData.MaxTotalCost, newSample.MaxTotalCost);
cumulativeData.MinTotalCost = Math.Min(cumulativeData.MinTotalCost, newSample.MinTotalCost);
if (cumulativeData.TotalScansCount > 0 || newSample.TotalScansCount > 0)
{
cumulativeData.AvgTotalCost = (cumulativeData.TotalScansCount * cumulativeData.AvgTotalCost
+ newSample.TotalScansCount * newSample.AvgTotalCost
)
/ (cumulativeData.TotalScansCount + newSample.TotalScansCount);
}
else
{
cumulativeData.AvgTotalCost = newSample.AvgTotalCost;
}
cumulativeData.TotalScansCount += newSample.TotalScansCount;
}
private void PersistStatementRelationStatistics(NormalizedStatementRelationStatistics newStatistics)
{
var repository = repositories.GetNormalizedStatementRelationStatisticsRepository();
var uniqueKey = new NormalizedStatementRelationStatisticsUniqueKey()
{
DatabaseID = newStatistics.DatabaseID,
Date = newStatistics.Date,
RelationID = newStatistics.RelationID,
NormalizedStatementID = newStatistics.NormalizedStatementID
};
var oldStatistics = repository.GetByUniqueKey(uniqueKey);
if (oldStatistics == null)
{
repository.Create(newStatistics);
}
else
{
NormalizedStatementRelationStatisticsMergeUtility.ApplySample(oldStatistics, newStatistics);
repository.Update(oldStatistics);
}
}