[英]Rails sorting or ordering query is slow
使用Rails 3.2,Ruby 1.9和will_paginate。 我有100,000条记录,并测试了以下查询:
# 1000+ms to load
@shops = Shop.where(:shop_type => @type).paginate(:include => :photos, :page => params[:page], :per_page => 25, :order => 'created_at DESC')
# 1000+ms to load
@shops = Shop.paginate(:include => :photos, :page => params[:page], :per_page => 25, :order => 'created_at DESC')
# 1000+ms to load
@shops = Shop.order('created_at DESC').limit(25)
# 1+ms to load
@shops = Shop.paginate(:include => :photos, :page => params[:page], :per_page => 25)
我注意到order
选项的速度非常慢。 测试结果表明will_paginate
不是问题。
我应该如何更改它order
可以加快查询order
。
是的,尝试在订单列上创建索引。 它将加快速度。
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