[
https://issues.apache.org/jira/browse/SOLR-17195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17866003#comment-17866003
]
ASF subversion and git services commented on SOLR-17195:
--------------------------------------------------------
Commit 27ef6d58f72e7a9f125fa7fa81ebe48aa7a2e42b in solr's branch
refs/heads/pr/2550 from Jason Gerlowski
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=27ef6d58f72 ]
SOLR-17195: Add 'minPrefixLength' soft limit (#2499)
Prefix queries have a memory cost that increases in proportion with the
number of indexed terms that start with that prefix. This can cause
stability problems, especially for short prefixes which can match a
large number of indexed-terms.
This commit introduces a new solrconfig.xml setting,
`minPrefixQueryTermLength`, similar to the existing
`maxBooleanClauses`. This setting causes an error to be thrown any
time a prefix query is created with a prefix shorter than the configured
minumum.
The limit is set at '-1' in the default configset, essentially disabling it.
But
users may change the value in their own configs or use the
'solr.query.minPrefixLength' property as an override. The limit may also be
overridden on a per-query basis by providing a 'minPrefixQueryTermLength'
local param.
> Minimum prefix-length soft limit
> --------------------------------
>
> Key: SOLR-17195
> URL: https://issues.apache.org/jira/browse/SOLR-17195
> Project: Solr
> Issue Type: Sub-task
> Components: query
> Reporter: Jason Gerlowski
> Assignee: Jason Gerlowski
> Priority: Major
> Fix For: main (10.0), 9.7
>
> Time Spent: 4h 20m
> Remaining Estimate: 0h
>
> Solr performs a prefix query by rewriting it as a (potentially) large boolean
> or terms query, with a clause for each term in the "term dictionary" that
> matches the prefix. The shorter the prefix, the more expensive this can be
> and the more likely it is to cause performance problems for users.
> We should add a configurable soft-limit, of the type described in SOLR-17191,
> to prevent users from unknowingly providing very-short-prefixes.
> (This may require coordination and buy-in from the Lucene project, depending
> on implementation details.)
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@solr.apache.org
For additional commands, e-mail: issues-h...@solr.apache.org
