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https://issues.apache.org/jira/browse/NIFI-1135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Payne updated NIFI-1135:
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Resolution: Fixed
Status: Resolved (was: Patch Available)
> For Provenance Query, bring back Event Summaries instead of the Events
> themselves
> ---------------------------------------------------------------------------------
>
> Key: NIFI-1135
> URL: https://issues.apache.org/jira/browse/NIFI-1135
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework, Core UI
> Affects Versions: 1.0.0
> Reporter: Mark Payne
> Assignee: Matt Gilman
> Fix For: 1.2.0
>
>
> Currently, when we query Provenance, we pull back up to 1000 events. These
> are full Provenance Events with attributes, etc. If the query takes a long
> time, we will request those objects that already have matched the query many
> times. This amounts to a great deal of heap being used and sending back very
> large JSON objects (10+ MB is not uncommon and it could potentially be far
> worse).
> We should instead use a ProvenanceEventSummary object. This object should
> contain just the info shown in the results table and the pointer to the
> actual event in the Provenance Store. This allows us to return the queries
> much faster, store less data in the heap, and provide less data back to the
> end user with virtually the same experience.
> The one place that this would differ in UX is when the user clicks the "info"
> button to view the entire provenance event, we would have to pull the event
> back from the server, rather than already having that in memory.
> We should consider storing all of the fields in the results table in Lucene
> to provide faster results. Otherwise, we could still get potentially better
> results with the current approach if we just ensure that the first fields
> that we store are those in the results table. This allows us to read just a
> small portion of the event from file and deserializing just a small amount of
> data before moving on to the next event.
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