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From "Piotr Jagielski (JIRA)" <j...@apache.org>
Subject [jira] Commented: (ODE-444) Improve performance of InstanceManagement (1.x branch)
Date Wed, 07 Jan 2009 10:34:44 GMT

    [ https://issues.apache.org/jira/browse/ODE-444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12661512#action_12661512

Piotr Jagielski commented on ODE-444:

Is this patch going to be applied on trunk? I searched the code and found that it isn't and
comments say that listInstances will be deprecated since ODE 1.3

> Improve performance of InstanceManagement (1.x branch)
> ------------------------------------------------------
>                 Key: ODE-444
>                 URL: https://issues.apache.org/jira/browse/ODE-444
>             Project: ODE
>          Issue Type: Task
>          Components: Management Console
>    Affects Versions: 1.2
>            Reporter: Alex Boisvert
>            Assignee: Alex Boisvert
>             Fix For: 1.3
> There are some performance issues with the current InstanceManagement.listXXXInstances()
operations, notably:
> 1) listAllInstances() is quite dangerous -- it will run into OutOfMemoryException if
you have lots of instances
> 2) listAllInstancesWithLimit() is better but suffers performance-wise because it attempts
to load the instance summary data, the events, the scopes and properties of the matching instances.
 This result is too much database activity for the common case, moreover the current implementation
is horrific because it actually performs 4 joins for each instance!
> So I'm introducing listInstancesSummary(String filter, String order, int limit) that
only loads the instance summary and the properties in only 3 joins (total, not per instance)
to address these performance issues and making both listAllInstances() and listAllInstancesWithLimit()
use this method under the cover.

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