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From Mike Matrigali <mikem_...@sbcglobal.net>
Subject Re: [jira] Updated: (DERBY-938) ContextManager needs to be optimized
Date Wed, 15 Feb 2006 18:50:17 GMT
what do I need to look at an xhtml file on windows?

Dyre Tjeldvoll (JIRA) wrote:
>      [ http://issues.apache.org/jira/browse/DERBY-938?page=all ]
> 
> Dyre Tjeldvoll updated DERBY-938:
> ---------------------------------
> 
>     Attachment: get.xhtml
> 
> Attaching a spreadsheet that shows the reduction in CPU resulting from optimizing getContext(String)
for StatementContext and ExecutionContext. The load is  single record select, 100000 records
in the table, pageCacheSize=10000, 10 sek warmup time, and 10 min running time. The measurements
are obtained using Sun Performance Analyzer 7.4
> 
> While I have accepted the fact that the getContext(String) part of the patch will not
make it into Derby, I would still like to document that there IS a perfomance issue  lurking
here, and I would encourage "the folks that have been working on the product for nearly ten
years" to think about how it can be fixed without violating other important design criteria.
> 
> 
>>ContextManager needs to be optimized
>>------------------------------------
>>
>>         Key: DERBY-938
>>         URL: http://issues.apache.org/jira/browse/DERBY-938
>>     Project: Derby
>>        Type: Improvement
>>  Components: Performance
>>    Reporter: Dyre Tjeldvoll
>>    Assignee: Dyre Tjeldvoll
>>    Priority: Minor
>> Attachments: derby-938.diff, derby-938.html, derby-938.stat, derbyall_report.txt,
get.xhtml
>>
>>ContextManagers are used extensively, particularly to get access to ExcutionContexts
and StatementContexts. Optimizing this access should improve overall performance. 
> 
> 


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