[DUG] Firebird transactions

[Jolyon Smith]

If it was FireBird "not keeping up" then I would expect occasional
transactions to be missed, not duplicated.  That sounds more like FireBird
not having enough to do, so making work for itself just so as to have
something to do whilst waiting around for the workstation to get into gear
and sent the next piece of real work.

 

The database equivalent of twiddling it's thumbs.  J

 

It sounds more like you have a simple (?) error in the code running on your
workstation resulting in it sending duplicate transactions (I am guessing
that by "transaction" here you mean an "insert statement", rather than some
complex series of DML statements).

 

 

From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On
Behalf Of John Bird
Sent: Thursday, 22 July 2010 13:27
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Firebird transactions

 

The error is same transaction going in twice, each one with different ID
(from the Generator) but otherwise the same.   The generator is fired by the
program,  so looks like its the calling program somehow doing the same
processing twice.  Not helped by the fact that the program is running these
bursts of transactions on an old slow Windows 2000 box...just wanted to
eliminate Firebird not keeping up.

 

John

 

Hi

FB should easily handle this. What is your error?

Cheers
Rob 

 


On 22/07/2010 12:30 p.m., John Bird wrote: 

Dealing with a timing issue involving Firebird, probably the cause is a slow

workstation running the processing program.
 
The workstation occasionally sends a burst of transactions, each involving 
adding new records to the same two tables.  I presume Firebird can handle 
this
 
The server is a FAST quad core Windows 2003 server running Firebird 2.0 - it

should handle a burst of transactions at up to 5 per second for up to 20 or 
30 seconds?
 
John 
 
 
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