[teiid-issues] [JBoss JIRA] Closed: (TEIID-913) Refine buffer management

Fri Jun 25 10:09:47 EDT 2010

     [ https://jira.jboss.org/browse/TEIID-913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Hawkins closed TEIID-913.
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> Refine buffer management
> ------------------------
>
>                 Key: TEIID-913
>                 URL: https://jira.jboss.org/browse/TEIID-913
>             Project: Teiid
>          Issue Type: Task
>          Components: Query Engine
>    Affects Versions: 7.0
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 7.0
>
>
> The current buffermanagement scheme has several limitations that should be resolved:
> 1. We over use the buffermanager to create temporary results for sub-plans and sort operations where batch streaming would suffice.
> 2. The blockedonmemory exception is inefficient for resolving resource conflicts.
> 3. Most of the buffers in the plan (batches stored on nodes and intermeiated node results) are not accounted for in the active batches.
> 4. Outside of the initial sort phase of the multi-pass sort batch access is highly ephemeral and is inherently limited by the number of process worker threads.

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