From 301194f8ead14c63d3bb7acac1cb70d43cb7adae Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Mon, 15 Dec 2008 15:06:31 +0000 Subject: [PATCH] Reduce the scaling factor for attstattarget to number-of-lexemes from 100 to 10, to compensate for the recent change in default statistics target. The original number was pulled out of the air anyway :-(, but it was picked in the context of the old default, so holding the default size of the MCELEM array constant seems the best thing. Per discussion. --- src/backend/tsearch/ts_typanalyze.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/src/backend/tsearch/ts_typanalyze.c b/src/backend/tsearch/ts_typanalyze.c index d30afe352c..6e79c443e3 100644 --- a/src/backend/tsearch/ts_typanalyze.c +++ b/src/backend/tsearch/ts_typanalyze.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/tsearch/ts_typanalyze.c,v 1.4 2008/12/13 19:13:44 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/tsearch/ts_typanalyze.c,v 1.5 2008/12/15 15:06:31 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -105,7 +105,7 @@ ts_typanalyze(PG_FUNCTION_ARGS) * is no more than a few times w. * * We use a hashtable for the D structure and a bucket width of - * statistics_target * 100, where 100 is an arbitrarily chosen constant, + * statistics_target * 10, where 10 is an arbitrarily chosen constant, * meant to approximate the number of lexemes in a single tsvector. */ static void @@ -130,8 +130,8 @@ compute_tsvector_stats(VacAttrStats *stats, LexemeHashKey hash_key; TrackItem *item; - /* We want statistics_target * 100 lexemes in the MCELEM array */ - num_mcelem = stats->attr->attstattarget * 100; + /* We want statistics_target * 10 lexemes in the MCELEM array */ + num_mcelem = stats->attr->attstattarget * 10; /* * We set bucket width equal to the target number of result lexemes. -- 2.40.0