Julian Reschke created OAK-2931:
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Summary: RDBDocumentStore: mitigate effects of large query result
setsT
Key: OAK-2931
URL: https://issues.apache.org/jira/browse/OAK-2931
Project: Jackrabbit Oak
Issue Type: Sub-task
Components: rdbmk
Affects Versions: 1.0.14, 1.2.2, 1.3
Reporter: Julian Reschke
Assignee: Julian Reschke
With the DocumentStore query API, large result sets can happen; and these are
returned as List<Document>, potentially causing large amounts of memory to be
allocated.
In the current implementation, the result list is generated based on a list of
internal row presentations (RDBRow). These are currently freed when the method
finishes. They should be freed as early as possible.
Furthermore, when the result set gets big, RDBDocumentStore should llog an
error containing the call chain, so that the component doing the excessive
query can be identified (it should use paging instead).
(For completeness: we could also change the code to lazily populate the list;
but that would be a bigger change)
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