FreeTDS Development Group

["Lowden, James K" <LowdenJK AT bernstein.com>]

> From: Michael Peppler [mailto:mpeppler AT peppler.org]
> Sent: February 10, 2003 4:36 PM
> 
> Sybase negotiates the packet size based on various configuration
> parameters (on the server side), and on the requested packet 
> size in the
> client. In general for a Sybase server to use larger packets you will
> have to configure something called "additional network 
> memory", although I'm a little fuzzy on the details.

Microsoft says:

The default packet size set by Microsoft® SQL Server(tm) is 4096 bytes. If
an application does bulk copy operations, or sends or receives large amounts
of text or image data, a packet size larger than the default may improve
efficiency because it results in fewer network reads and writes. If an
application sends and receives small amounts of information, you can set the
packet size to 512 bytes, which is sufficient for most data transfers.

I am inclined, as a strategy, to use packets of 4096 when connecting via TDS
7+.  For Sybase servers, perhaps we can negotiate the packet size with
capabilities?  We could request 4096 and see what the server comes back
with?  

Were we to do that, the freetds.conf option would become superfluous.  

--jkl


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