user/dev discussion of public-inbox itself
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From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH] search: disable phrase searching, for now
Date: Thu, 16 May 2019 03:47:01 +0000
Message-ID: <20190516034701.30230-1-e@80x24.org> (raw)

There probably needs to be an option to enable this
independently of indexlevel; but for now this is
the safest option.

And, as I discovered during the development of the
indexlevel option, Xapian does a pretty good job of
finding phrases without position data, anyways.
---
 lib/PublicInbox/Search.pm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index 090d998..bb4bd45 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -45,7 +45,11 @@ use constant {
 
 	# n.b. FLAG_PURE_NOT is expensive not suitable for a public website
 	# as it could become a denial-of-service vector
-	QP_FLAGS => FLAG_PHRASE|FLAG_BOOLEAN|FLAG_LOVEHATE|FLAG_WILDCARD,
+	#
+	# FLAG_PHRASE also seems to cause performance problems sometimes.
+	# TODO: make this an option, maybe?
+	# or make indexlevel=medium as default
+	QP_FLAGS => FLAG_BOOLEAN|FLAG_LOVEHATE|FLAG_WILDCARD,
 };
 
 my %bool_pfx_external = (
-- 
EW


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user/dev discussion of public-inbox itself

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