[c#/beetlex] update db connection string (#6126)

* update beetlex 1.4.3

update beetlex 1.4.3

* docker add COMPlus_ReadyToRun variable
update beetlex

* update beetlex, enabled thread queue

* beetlex framework add db and queries cases

* add db code

* change result json data

* update query url

* beetlex framework add fortunes cases

* change Content-Type

* add beetlex core cases

* fix queries cases

* update config

* change try readline

* update benchmark config

* Update README.md

* Update README.md

* change versus property

* beetlex-core update .net core to v3.0

* change beetlex-core project file

* beetlex update raw db class

* beetlex update raw db

* beetlex debug plaintext

* change debug docker file

* update beetlex to 1.4.0

* update

* beetlex update core 3.1

* [c#/beetlex] add updates cases

* [c#/beetlex] change Server: TFB, change custom connection pool, add update docker

* fix errors

* change pool init

* change connection pool maxsize

* fix fortunes errors

* clear DBRaw _connectionString value.

* [c#beetlex] change update dbconnection pool size

* [c#/beetlex] udpate spanjson to v3.0.1, Npgsql v5.0.0

* [c#/beetlex] add caching sample

* set connectionstring multiplexing

* remove connection multiplexing setting

* [c#/beetlex]change NpgsqlParameter to  NpgsqlParameter<T>

* [c#/beetlex] update dbraw

* [c#/beetlex] change connection string

frameworks/CSharp/beetlex/PlatformBenchmarks/HttpServer.cs

@@ -27,13 +27,13 @@ namespace PlatformBenchmarks
             ApiServer.Open();
             if (!Program.UpDB)
             {
-               RawDb._connectionString = "Server=tfb-database;Database=hello_world;User Id=benchmarkdbuser;Password=benchmarkdbpass;Maximum Pool Size=256;NoResetOnClose=true;Enlist=false;Max Auto Prepare=3";
+               RawDb._connectionString = "Server=tfb-database;Database=hello_world;User Id=benchmarkdbuser;Password=benchmarkdbpass;Maximum Pool Size=256;NoResetOnClose=true;Enlist=false;Max Auto Prepare=4;Multiplexing=true;Write Coalescing Delay Us=500;Write Coalescing Buffer Threshold Bytes=1000";
                 //RawDb._connectionString = "Server=192.168.2.19;Database=hello_world;User Id=benchmarkdbuser;Password=benchmarkdbpass;Maximum Pool Size=256;NoResetOnClose=true;Enlist=false;Max Auto Prepare=3";
             }
             else
             {
                // RawDb._connectionString = "Server=192.168.2.19;Database=hello_world;User Id=benchmarkdbuser;Password=benchmarkdbpass;Maximum Pool Size=64;NoResetOnClose=true;Enlist=false;Max Auto Prepare=3";
-               RawDb._connectionString = "Server=tfb-database;Database=hello_world;User Id=benchmarkdbuser;Password=benchmarkdbpass;Maximum Pool Size=64;NoResetOnClose=true;Enlist=false;Max Auto Prepare=3";
+               RawDb._connectionString = "Server=tfb-database;Database=hello_world;User Id=benchmarkdbuser;Password=benchmarkdbpass;Maximum Pool Size=64;NoResetOnClose=true;Enlist=false;Max Auto Prepare=3;Multiplexing=true;Write Coalescing Delay Us=500;Write Coalescing Buffer Threshold Bytes=1000";
             }           
             ApiServer.Log(LogType.Info, null, $"Debug mode [{Program.Debug}]");
             return Task.CompletedTask;