[ https://issues.apache.org/jira/browse/SOLR-1961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882909#action_12882909 ]
Otis Gospodnetic edited comment on SOLR-1961 at 6/26/10 11:13 PM: ------------------------------------------------------------------ This looks useful. The 2 new classes should have the standard ASL stuff at the very top. I also spotted a couple of TODOs from/for somebody named Stuart? Oh, and do you happen to have any unit tests for this? was (Author: otis): This looks useful. The 2 new classes should have the standard ASL stuff at the very top. I also spotted a couple of TODOs from/for somebody named Stuart? > Use Lucene's Field Cache To Retrieve Stored Fields From Memory > -------------------------------------------------------------- > > Key: SOLR-1961 > URL: https://issues.apache.org/jira/browse/SOLR-1961 > Project: Solr > Issue Type: New Feature > Components: search > Affects Versions: 1.4 > Reporter: Stephen Bochinski > Attachments: patch.txt > > Original Estimate: 101.5h > Remaining Estimate: 101.5h > > This allows the user to configure which fields should be field cached in the > schema.xml file by adding the following attribute: > fieldCached="true" > Enabling this on a field greatly decreases the time needed to retrieve stored > fields. This works on fields containing Bytes, Strings, Integers, Longs, and > Floats. Enabling field cache is applicable in many scenarios. For instance, > if you have a bunch of text that is indexed and not stored and you only need > to retrieve a string or number associated with a document. Its applicable in > any case where there are many indexed fields and not too many stored fields > being retrieved. The memory consumption is not very high compared to the > performance gains field cache brings. > Memory consumption is governed by: Number of fields cached * Number of > documents * 8 bytes per reference + > SUM(Number of unique values of the field * average length of term) * > 2 (chars use 2 bytes) * String overhead (40 bytes) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org