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PERF: Perform only one category update when creating a new topic (#19361)

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When under extremely high load, it has been observed that updating the categories table when creating a new topic can become a bottleneck.

This change will reduce the two updates to one when a new topic is created within a category, and therefore should help with performance when under extremely high load.
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jbrw 2022-12-07 14:35:13 -05:00 committed by GitHub
parent 16e3bc3ff4
commit 64b781dacf
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1 changed files with 5 additions and 2 deletions
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5
lib/post_creator.rb
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@ -425,8 +425,11 @@ class PostCreator
def track_latest_on_category
return unless @post && @post.errors.count == 0 && @topic && @topic.category_id
if @post.is_first_post?
Category.where(id: @topic.category_id).update_all(latest_topic_id: @topic.id, latest_post_id: @post.id)
else
Category.where(id: @topic.category_id).update_all(latest_post_id: @post.id)
Category.where(id: @topic.category_id).update_all(latest_topic_id: @topic.id) if @post.is_first_post?
end
end
def ensure_in_allowed_users