[ https://issues.apache.org/jira/browse/SOLR-12572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Amrit Sarkar updated SOLR-12572: -------------------------------- Description: Today while exporting result through "/export" handler, {code:java} http://localhost:8983/solr/core_name/export?q=my-query&sort=severity+desc,timestamp+desc&fl=severity,timestamp,msg {code} Doc-valued sought for all the {{sort}} fields defined. When we stream out docs we again make doc-value seeks against the {{fl}} fields . In most common use-cases we have {{fl = sort}} fields, or atleast the sort fields are part of {{fl}}, so if we can pre-collect the values while sorting it, we can reduce the doc-value seeks potentially bringing speed improvement. was: Today while exporting result through "/export" handler, {code} http://localhost:8983/solr/core_name/export?q=my-query&sort=severity+desc,timestamp+desc&fl=severity,timestamp,msg {code} Documents are sorted in priority queue, where doc-value sought for all the sort fields defined. When we stream out docs we again make doc-value seeks against the fl fields . In most common use-cases we have fl = sort fields, or atleast the sort fields are part of "fl", so if we can pre-collect the values while sorting it , we can reduce the doc-value seeks potentially bringing speed improvement. > Reuse fieldvalues computed while sorting at writing in ExportWriter > ------------------------------------------------------------------- > > Key: SOLR-12572 > URL: https://issues.apache.org/jira/browse/SOLR-12572 > Project: Solr > Issue Type: Improvement > Security Level: Public(Default Security Level. Issues are Public) > Components: streaming expressions > Reporter: Amrit Sarkar > Assignee: Varun Thacker > Priority: Minor > Attachments: SOLR-12572.patch, SOLR-12572.patch > > > Today while exporting result through "/export" handler, > {code:java} > http://localhost:8983/solr/core_name/export?q=my-query&sort=severity+desc,timestamp+desc&fl=severity,timestamp,msg > {code} > Doc-valued sought for all the {{sort}} fields defined. When we stream out > docs we again make doc-value seeks against the {{fl}} fields . > In most common use-cases we have {{fl = sort}} fields, or atleast the sort > fields are part of {{fl}}, so if we can pre-collect the values while sorting > it, we can reduce the doc-value seeks potentially bringing speed improvement. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org