decrease ql query interval for sql transports (#4559)

Author: tmasternak

src/ServiceControl.Transports.PostgreSql/QueueLengthProvider.cs

@@ -132,7 +132,7 @@ async Task UpdateChunk(NpgsqlConnection connection, KeyValuePair<PostgreSqlTable
 
     static readonly ILog Logger = LogManager.GetLogger<QueueLengthProvider>();
 
-    static readonly TimeSpan QueryDelayInterval = TimeSpan.FromSeconds(1);
+    static readonly TimeSpan QueryDelayInterval = TimeSpan.FromMilliseconds(200);
 
     const int QueryChunkSize = 10;
 }

src/ServiceControl.Transports.SqlServer/QueueLengthProvider.cs

@@ -130,7 +130,7 @@ async Task UpdateChunk(SqlConnection connection, KeyValuePair<SqlTable, int>[] c
 
         static readonly ILog Logger = LogManager.GetLogger<QueueLengthProvider>();
 
-        static readonly TimeSpan QueryDelayInterval = TimeSpan.FromSeconds(1);
+        static readonly TimeSpan QueryDelayInterval = TimeSpan.FromMilliseconds(200);
 
         const int QueryChunkSize = 10;
     }