private PerformanceHint GetOrCreateSlowWrites(out SlowWritesDetails details)
{
const string source = "slow-writes";
var id = PerformanceHint.GetKey(PerformanceHintType.SlowIO, source);
using (_notificationsStorage.Read(id, out var ntv))
{
if (ntv == null || ntv.Json.TryGet(nameof(PerformanceHint.Details), out BlittableJsonReaderObject detailsJson) == false || detailsJson == null)
{
details = new SlowWritesDetails();
}
else
{
details = DocumentConventions.DefaultForServer.Serialization.DefaultConverter.FromBlittable <SlowWritesDetails>(detailsJson);
}
return(PerformanceHint.Create(
_database,
"An extremely slow write to disk",
"We have detected very slow writes",
PerformanceHintType.SlowIO,
NotificationSeverity.Info,
source,
details
));
}
}
public bool Update(UpdateStep step)
{
var table = step.WriteTx.OpenTable(step.ConfigurationStorage.NotificationsStorage._actionsSchema, NotificationsStorage.NotificationsSchema.NotificationsTree);
using (Slice.From(step.WriteTx.Allocator, PerformanceHint.GetKey(PerformanceHintType.SlowIO, string.Empty), out Slice slowIoHintPrefix))
{
table.DeleteByPrimaryKeyPrefix(slowIoHintPrefix);
}
return(true);
}
private PerformanceHint GetOrCreatePerformanceHint <T>(string processTag, string processName, PerformanceHintType etlHintType, string message, out T details) where T : INotificationDetails, new()
{
Debug.Assert(etlHintType == PerformanceHintType.SqlEtl_SlowSql);
var key = $"{processTag}/{processName}";
var id = PerformanceHint.GetKey(etlHintType, key);
using (_notificationsStorage.Read(id, out NotificationTableValue ntv))
{
details = GetDetails <T>(ntv);
return(PerformanceHint.Create(
_databaseName,
$"{processTag}: '{processName}'",
message,
etlHintType,
NotificationSeverity.Warning,
source: key,
details: details));
}
}