[jira] [Created] (SOLR-9579) Reuse lucene FieldType in createField flow during ingestion

["John Call (JIRA)" <ji...@apache.org>]

John Call created SOLR-9579:
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             Summary: Reuse lucene FieldType in createField flow during ingestion
                 Key: SOLR-9579
                 URL: https://issues.apache.org/jira/browse/SOLR-9579
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: Schema and Analysis
    Affects Versions: 6.x, master (7.0)
         Environment: This has been primarily tested on Windows 8 and Windows Server 2012 R2
            Reporter: John Call
            Priority: Minor
             Fix For: 6.x, master (7.0)


During ingestion createField in FieldType is being called for each field on each document. For the subclasses of FieldType without their own implementation of createField the lucene version of FieldType is created to be stored along with the value. However the lucene FieldType object is identical when created from the same SchemaField. In testing ingestion of one million rows with 22 field each we were creating 22 million lucene FieldType objects when only 22 are needed. Solr should lazily initialize a lucene FieldType for each SchemaField and reuse them for future ingestion. Not only does this relieve memory usage but also relieves significant pressure on the gc.

There are also subclasses of Solr FieldType which create separate Lucene FieldType for stored fields instead of reusing the static in StoredField.



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