/// <summary>Get default resource statistics</summary>
/// <cardinality>Many</cardinality>
public List <DefaultResourceStatisticsData> DefaultResourceStatistics()
{
var ret = new List <DefaultResourceStatisticsData>();
string sql = @"
select top 20
convert(varchar(2), datepart(day, date_time))
+ '.' + convert(varchar(2), datepart(hour, date_time))
+ '.' + convert(varchar(2), datepart(minute, date_time)) as hour_number
,drm.client_workingset_bytes
,drm.business_workingset_bytes
,drm.database_size_bytes
from default_resource_measurement as drm
order by date_time desc
";
Logging log = Logging.PerformanceTimeStart("Default", "DataAccessLayer", "DefaultSearch", "DefaultResourceStatistics");
try {
using (var conn = new SqlConnection(Conn.ConnectionString)) {
conn.Open();
conn.BeginTransaction(IsolationLevel.ReadUncommitted).Commit();
using (var command = new SqlCommand(sql, conn)) {
log.PerformanceTimePrepare(command);
IDataReader reader = command.ExecuteReader(CommandBehavior.SingleResult);
log.PerformanceTimeCheck();
var ordinals = new DefaultResourceStatisticsDataOrdinals(reader);
while (reader.Read())
{
var data = new DefaultResourceStatisticsData();
data.Populate(reader, ordinals);
ret.Add(data);
}
reader.Close();
}
}
} catch (Exception ex) {
log.Error(ex);
}
return(ret);
}
// use ordinals to speed up access to DataReader
// links:
// crud definition: https://en.wikipedia.org/wiki/Create,_read,_update_and_delete
// docLink: http://sql2x.org/documentationLink/327451c3-64a8-4de8-b359-76742d634497
// parameters:
// reader: IDataReader from SQLClient
public void Populate(IDataReader reader, DefaultResourceStatisticsDataOrdinals ordinals)
{
if (!reader.IsDBNull(ordinals.HourNumber))
{
HourNumber = reader.GetString(ordinals.HourNumber);
}
if (!reader.IsDBNull(ordinals.ClientWorkingsetBytes))
{
ClientWorkingsetBytes = reader.GetInt32(ordinals.ClientWorkingsetBytes);
}
if (!reader.IsDBNull(ordinals.BusinessWorkingsetBytes))
{
BusinessWorkingsetBytes = reader.GetInt32(ordinals.BusinessWorkingsetBytes);
}
if (!reader.IsDBNull(ordinals.DatabaseSizeBytes))
{
DatabaseSizeBytes = reader.GetInt32(ordinals.DatabaseSizeBytes);
}
}