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http://jira.nuxeo.org/browse/NXP-3206?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Olivier Grisel updated NXP-3206:
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Status: Open (was: Triage)
> default TREE_CHILDREN querymodel generates a very expensive complex JOIN when
> browsing folders with many documents (>5000)
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: NXP-3206
> URL: http://jira.nuxeo.org/browse/NXP-3206
> Project: Nuxeo Enterprise Platform
> Issue Type: Bug
> Components: Web Foundations
> Affects Versions: 5.2 M4
> Reporter: Olivier Grisel
> Assignee: Olivier Grisel
> Priority: Major
> Fix For: 5.2 RC
>
> Original Estimate: 4 hours
> Remaining Estimate: 4 hours
>
> When using the core sql search with the querymodel based tree manager, the
> default TREE_CHILDREN querymodel with definition:
> <queryModel name="TREE_CHILDREN">
> <pattern>
> SELECT * FROM Document WHERE ecm:parentId = ?
> AND ecm:isProxy = 0
> AND ecm:mixinType = 'Folderish'
> AND ecm:mixinType != 'HiddenInNavigation'
> AND ecm:isCheckedInVersion = 0
> AND ecm:currentLifeCycleState != 'deleted'
> </pattern>
> <sortable value="true" defaultSortColumn="dc:title"
> defaultSortAscending="true" />
> <max>50</max>
> </queryModel>
> Generates the following SQL request in the backend:
> SELECT DISTINCT "_nxhier"."id", "dublincore"."title" FROM "hierarchy"
> "_nxhier" LEFT JOIN "proxies" ON "proxies"."id" = "_nxhier"."id" JOIN
> "hierarchy" ON ("hierarchy"."id" = "_nxhier"."id" OR "hierarchy"."id" =
> "proxies"."targetid") LEFT JOIN "dublincore" ON "hierarchy"."id" =
> "dublincore"."id" LEFT JOIN "versions" ON "_nxhier"."id" = "versions"."id"
> LEFT JOIN "misc" ON "hierarchy"."id" = "misc"."id" WHERE
> "hierarchy"."primarytype" IN ('NewFolder', 'Workspace', 'Section',
> 'SectionExt', 'OrderedFolder', 'FolderTemplate', 'WorkspaceRoot', 'Domain',
> 'TemplateRoot', 'TextoFolder', 'GestionRoot', 'SectionOrg', 'Folder',
> 'SectionRoot') AND ("_nxhier"."parentid" =
> 'fa59bf57-d89c-4bb6-92bd-6838f54e3ace') AND ("versions"."id" IS NULL) AND
> ("misc"."lifecyclestate" <> 'deleted') AND NX_ACCESS_ALLOWED("_nxhier"."id",
> '{administrators,Administrator,Everyone}',
> '{Browse,Ecriture,Gestion,Lecture,Read,ReadProperties,ReadRemove,ReadWrite,Everything}')
> ORDER BY"dublincore"."title";
> This request takes more than 20s on a folder with 20000 documents. The
> culprit is the LEFT JOIN on the proxies table which is useless to compute the
> tree nodes since folders cannot be proxies in the default implementation of
> Nuxeo.
> Adding the predicate "ecm:isProxy = 0" to the TREE_CHILDREN definition make
> the same request last around 200ms.
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