[teiid-issues] [JBoss JIRA] (TEIID-219) Add a way to limit or suppress queries that exceed a threshold Cost-Based Optimizer value

[Steven Hawkins (Jira)]

    [ https://issues.jboss.org/browse/TEIID-219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13673382#comment-13673382 ] 

Steven Hawkins commented on TEIID-219:
--------------------------------------

We do now have active restrictions on memory / disk, but not proactive restrictions.

Possible Dimensions:
- cpu
- memory (max footprint / total usage)
- network (from a source, all sources, to client)
- wall clock time - active restriction based upon timeouts

With the current logic we are best suited to estimate memory / network based upon row counts.   There again we have an active, but not proactive restrictions, on source row counts.

We don't have anything meaningful for cpu utilization as we don't have a model of consumption down to the expression level.  We will likely need to introduce a very simple metric. 
 I don't see us making any meaningful estimate of wall clock time.


> Add a way to limit or suppress queries that exceed a threshold Cost-Based Optimizer value
> -----------------------------------------------------------------------------------------
>
>                 Key: TEIID-219
>                 URL: https://issues.jboss.org/browse/TEIID-219
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Query Engine, Server
>    Affects Versions: 6.0.0
>            Reporter: Marc Shirley
>            Assignee: Steven Hawkins
>            Priority: Major
>             Fix For: 12.0
>
>
> Client requesting an ability to impose a limit on, or suppress, any query that exceeds a cost estimate value specified by the user/administrator.



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