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From Bryan Pendleton <bpendle...@amberpoint.com>
Subject Re: [jira] Commented: (DERBY-326) Improve streaming of large objects for network server and client
Date Thu, 30 Mar 2006 15:22:39 GMT
Tomohito Nakayama (JIRA) wrote:
> This result suggests that problem around buffer at client is the reason why the patch
does not improve streaming blob.

Is it correct to restate this as follows:
  - Before, both the server and the client had significant performance
    problems with the handling of large objects in the DRDA messages
  - After your patch, the server is better, but the improvement is
    hard to see because the client is now the bottleneck

One way to see the overall improvement might be to measure overall
system load during your benchmark, both before and after your patch.

The expectation would be that overall system load drops due to the
improved server-side efficiency, but throughput does not improve
very much due to the remaining client-side bottleneck.

If overall system load doesn't drop much at all, then would the
conclusion be that the patch makes the server better, but the client
has actually become worse due to using a less efficient algorithm
to handle the no-length-header message format?

thanks,

bryan


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