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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-821) single norm file still uses up descriptors
Date Sun, 04 Mar 2007 08:02:50 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12477759
] 

Michael McCandless commented on LUCENE-821:
-------------------------------------------

> The reason is predictability... since you don't know what queries are coming, you don't
know when that descriptor will be closed, and hence need to plan for the upper bound on descriptor
usage anyway.

Agreed, the upper bound is what counts here, so it's not much help to reduce by one at some
random later time.

> single norm file still uses up descriptors
> ------------------------------------------
>
>                 Key: LUCENE-821
>                 URL: https://issues.apache.org/jira/browse/LUCENE-821
>             Project: Lucene - Java
>          Issue Type: Bug
>            Reporter: Yonik Seeley
>         Assigned To: Yonik Seeley
>         Attachments: norms.patch
>
>
> The new index file format with a single .nrm file for all norms does not decrease file
descriptor usage.
> The .nrm file is opened once for each field with norms in the index segment.

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