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PERF: improve offset discovery query

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This commit is contained in:
Sam 2016-08-12 14:36:38 +10:00
parent 80e2fa05be
commit 8a792508e9
1 changed files with 7 additions and 3 deletions
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10
lib/search.rb
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@ -131,10 +131,14 @@ class Search
def self.min_post_id_no_cache def self.min_post_id_no_cache
return 0 unless SiteSetting.search_prefer_recent_posts? return 0 unless SiteSetting.search_prefer_recent_posts?
offset = Post.unscoped.count - SiteSetting.search_recent_posts_size
return 0 if offset <= 0
Post.unscoped.order(:id).offset(offset).limit(1).pluck(:id)[0] offset, has_more = Post.unscoped
.order('id desc')
.offset(SiteSetting.search_recent_posts_size-1)
.limit(2)
.pluck(:id)
has_more ? offset : 0
end end
def self.min_post_id(opts=nil) def self.min_post_id(opts=nil)