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PERF: Faster TL3 promotion replies needed calculation (#10416)

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Removing the LIMIT makes PostgreSQL use index_posts_on_user_id_and_created_at
which is much faster overall.

Before: 22 seconds
After: 100 ms
This commit is contained in:
Rafael dos Santos Silva 2020-08-12 11:28:34 -03:00 committed by GitHub
parent 00a0767c35
commit 28669dfeb2
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 6 additions and 10 deletions
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2
app/models/trust_level3_requirements.rb
View File

@ -143,7 +143,7 @@ class TrustLevel3Requirements
end
def num_topics_replied_to
@user.user_stat.calc_topic_reply_count!(min_topics_replied_to + 1, time_period.days.ago)
@user.user_stat.calc_topic_reply_count!(time_period.days.ago)
end
def min_topics_replied_to

12
app/models/user_stat.rb
View File

@ -154,11 +154,9 @@ class UserStat < ActiveRecord::Base
end
# topic_reply_count is a count of posts in other users' topics
def calc_topic_reply_count!(max, start_time = nil)
def calc_topic_reply_count!(start_time = nil)
sql = <<~SQL
SELECT COUNT(*) count
FROM (
SELECT DISTINCT posts.topic_id
SELECT COUNT(DISTINCT posts.topic_id) AS count
FROM posts
INNER JOIN topics ON topics.id = posts.topic_id
WHERE posts.user_id = ?
@ -166,13 +164,11 @@ class UserStat < ActiveRecord::Base
AND posts.deleted_at IS NULL AND topics.deleted_at IS NULL
AND topics.archetype <> 'private_message'
#{start_time.nil? ? '' : 'AND posts.created_at > ?'}
LIMIT ?
) as user_topic_replies
SQL
if start_time.nil?
DB.query_single(sql, self.user_id, max).first
DB.query_single(sql, self.user_id).first
else
DB.query_single(sql, self.user_id, start_time, max).first
DB.query_single(sql, self.user_id, start_time).first
end
end

2
lib/promotion.rb
View File

@ -91,7 +91,7 @@ class Promotion
return false if stat.days_visited < SiteSetting.tl2_requires_days_visited
return false if stat.likes_received < SiteSetting.tl2_requires_likes_received
return false if stat.likes_given < SiteSetting.tl2_requires_likes_given
return false if stat.calc_topic_reply_count!(SiteSetting.tl2_requires_topic_reply_count) < SiteSetting.tl2_requires_topic_reply_count
return false if stat.calc_topic_reply_count! < SiteSetting.tl2_requires_topic_reply_count
true
end