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From Mike Matrigali <mikem_...@sbcglobal.net>
Subject Re: [jira] Updated: (DERBY-959) Allow use of DRDA QRYDTA block sizes greater than 32K
Date Wed, 14 Jun 2006 19:01:09 GMT


Bryan Pendleton wrote:
>> Please let me know if you need more information to understand these 
>> traces.  Thanks. 
> 
> 
> The traces look good to me, although of course it is always hard to read 
> traces,
> it's just a fact of life.
> 
> You mentioned that this is a server-only patch at this point; have you 
> started
> to think about what we should do to the client to take advantage of this?
> 
> Also, thanks very much for clarifying the 10 Meg maximum from the DRDA 
> spec.
> 
> Have you thought about what a "good" value might be for the server? It 
> seems like
> there might be reasons that a value higher than 32K, but lower than 10 
> Meg, turns
> out to offer the best tradeoffs of performance, memory usage, etc. I 
> imagine that
> we would want to run some benchmarks to try to investigate the buffering 
> behaviors
> and where the interesting points are in the performance of the network 
> code. What
> sort of measurements would be revealing?

Sounds like a new jira entry should be created to test and explore 
changing the default size.  Seems safe to commit this change and then
change default once more work is done to understand the tradeoffs.

> 
> thanks,
> 
> bryan
> 
> 
> 


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