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From Toke Eskildsen <t...@kb.dk>
Subject Re: upgrading from solr4 to solr8 searches taking 4 to 10 times as long to return
Date Sun, 08 Sep 2019 17:42:25 GMT
G√ľnter Hipler <guenterh.lists@bluewin.ch> wrote:
> what about this
> https://issues.apache.org/jira/browse/SOLR-8096
> seems still unresolved issue?

Unfortunately Russell has de-shared the solrconfig.xml, but as far as I remember it does not
trigger faceting.

> With our migration from version 4 to 7 last year we experienced similar
> problems.

The iterator-based DocValues implementation in Solr 7 has a performance issue with large segments,
with symptoms akin to SOLR-8096. If you have not already solved your problems, Solr 8 (with
an upgraded index) might help.

- Toke Eskildsen

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