FreeTDS Development Group

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

> From: Gad Hayisraeli [mailto:gadh AT vmanage.com]
> Sent: February 2, 2003 5:47 AM
> To: freetds AT lists.ibiblio.org
> 
> i found that the speed border is 14 columns, no matter their size.
> to say: i tried "insert into " from linux client to sybase db 
> on windows, and these are the results:
> 
> less than 15 columns = 185 LPS
> 17 cols = 41 LPS
> 26 cols = 3.5 LPS

Gad, 

How does the server perform by itself, without transporting the data over
the network?  

Try inserting your data into a temporary table, and time a loop that reads
the temp table and inserts the rows into the regular table.  I think you'll
find that the server itself slows down.  

This for sure: the TDS protocol is insensitive to column count.  One column
or a hundred, TDS doesn't care.  If there's some negative interaction with
the underlying packet layer, I'd be very surprised.  

--jkl


> > -----Original Message-----
> > From: freetds-admin AT lists.ibiblio.org 
> [mailto:freetds-admin AT lists.ibiblio.org]On Behalf Of Gad Hayisraeli
> > Sent: Thursday, January 30, 2003 10:41 AM
> > To: FreeTDS List
> > Subject: [freetds] freetds is very,very slow when "insert 
> into" sybase 12.5
> >
> >
> > my config:
> > client : linux RH 6.2 x86, P-III 800 mhz, freetds 0.60, 
> iodbc driver manager , tds version 5.0
> > data : 26 columns table (mainly strings)
> > server : windows , sybase 12.5 ASE.
> >
> > (windows hardware is the same as linux)
> >
> > speed : 3.5 lines per second (lps) for "insert into" with 
> parameters.
> >
> > comparisons:
> > =============
> > windows,sybase - local (odbc of sybase) : 181 lps
> >
> >
> > linux, mysql 3.23, remote( tcpip,odbc) - 145 lps
> >
> > so obviously its the tds that slows things down ( by more 
> than x20 ! )
> >
> > can someone explain why ?
> >
> > thanks
> >
> > Gad
> >
> >
> >
> >
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> 
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