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https://issues.apache.org/jira/browse/SOLR-9506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15585683#comment-15585683
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Yonik Seeley edited comment on SOLR-9506 at 10/18/16 3:02 PM:
--------------------------------------------------------------

bq. "Right... the core cache key does not change, even if there are deletes for 
the segment."

So the cache key ignores deleted documents, while the value being cached does 
not.  It's a fundamental mis-match.


was (Author: ysee...@gmail.com):
"Right... the core cache key does not change, even if there are deletes for the 
segment."

So the cache key ignores deleted documents, while the value being cached does 
not.  It's a fundamental mis-match.

> cache IndexFingerprint for each segment
> ---------------------------------------
>
>                 Key: SOLR-9506
>                 URL: https://issues.apache.org/jira/browse/SOLR-9506
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Noble Paul
>         Attachments: SOLR-9506.patch, SOLR-9506.patch, SOLR-9506_POC.patch
>
>
> The IndexFingerprint is cached per index searcher. it is quite useless during 
> high throughput indexing. If the fingerprint is cached per segment it will 
> make it vastly more efficient to compute the fingerprint



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