[freetds] [FreeTDS] connection pool

Xiaobiao Yin xiaobiaoyin at outlook.com
Thu Sep 1 21:59:28 EDT 2016


Hi


   Thank you for the information.

   I will have a try.

Brs
Eric
________________________________
From: FreeTDS <freetds-bounces at lists.ibiblio.org> on behalf of Frediano Ziglio <freddy77 at gmail.com>
Sent: Thursday, September 1, 2016 6:24 PM
To: FreeTDS Development Group
Subject: Re: [freetds] [FreeTDS] connection pool

2016-09-01 1:53 GMT+01:00 Xiaobiao Yin <xiaobiaoyin at outlook.com>:
> Hi Frediano
>
>     Thank you really.
>
>     In my case, I have to insert the rows to table one by one.
>
>     For the connection pooling, I got the information from the User Guide.
>
>    http://www.freetds.org/userguide/tdspool.htm,
TDS Connection Pooling - FreeTDS.org<http://www.freetds.org/userguide/tdspool.htm>
www.freetds.org
TDS Connection Pooling. The Connection Pooling server swims in the src/pool directory. The FreeTDS connection pool is a server process; it emulates a SQL Server.



>
>    The FreeTDS connection pool currently only supports TDS version 4.2.
>

Oh... thanks to point it out, this page is out of date unfortunately.

Basically no 5.0 (Sybase), no encryption, SQL username/passwords.

>
>    If FreeTDS 1.0 supports protocol 7.2 with some limitations, where can I find the
>
> limitation's description, so that I can identify if it will affect my case.
>
>
>   BTW, is there any sample code for connection pooling?
>

Beside protocol version pool examples should work.

>
> Thanks in advance
>
> Eric
>
> ________________________________
> From: FreeTDS <freetds-bounces at lists.ibiblio.org> on behalf of Frediano Ziglio <freddy77 at gmail.com>
> Sent: Wednesday, August 31, 2016 9:18 PM
> To: FreeTDS Development Group
> Subject: Re: [freetds] [FreeTDS] connection pool
>
> 2016-08-31 11:35 GMT+01:00 Xiaobiao Yin <xiaobiaoyin at outlook.com>:
>> Hi Experts
>>
>>
>>     I use FreeTDS (linux) to communicate with a SQL server 2005 in Windows,
>>
>> and tried to use [dbcmd() and dbsqlexec()]  100 times to insert 1 item to database tables.
>>
>>    The performance is that one insert statement consumes about 2~3ms.
>>
>>
>>     I know there is a so called Connection pool, but it only support TDS 4.2 while SQL server need TDS 7.2.
>>
>>
>>    So in order to optimize the performance, I may need to open 2 or more connections, it is a little hard to
>>
>> control these connections.
>>
>>
>>    My question is that are there some ways to optimize the performace.
>>
>> The target should be 1ms per 1 insert statement.
>>
>>
>> Any suggetions are welcome.
>>
>>
>> Thanks
>>
>> Eric
>>
>
>
> It's not clear if the problem is application or connections.
> If you have one application that needs to insert rows into a table
> it's better to batch the inserts instead of using a query for each
> row.
> If you have multiple process each needing to connect to database and
> insert a row then would be better to use a connection pooling. The
> connection pooling included in FreeTDS 1.0 supports protocol 7.2 with
> some limitations.
>

Frediano
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