mysql-在Rails中加速查询

我正在从起点逐渐过渡到中等水平.在我的追求中,我遇到了某些查询加载所花费的时间问题.

我想知道是否有人可以指出一些可以改善我的索引操作查询性能的事情.

运行Rails 3.2.0,ruby 1.9.3p194和MySQL

现在,我列出了所有机构(大约7000家),并且加载需要10秒的时间…

我的索引动作

  def index
    @institution = Institution.includes(:state).all
  end

视图

<tbody>
    <% @institution.each do |c| %>
    <tr>
        <td><%= c.company %></td>
        <td><%= c.state.name %></td>
        <td><%= number_to_human(c.assets) %></td>
        <td><%= c.hadademo %></td>
        <td><%= c.datebecameclient %></td>
        <td><%= c.clientorprospect %></td>
        <% if current_user.admin? %>
            <td><%= link_to 'Edit', edit_institution_path(c), :class => 'btn btn-mini btn-warning'  %></td>
        <% end %>
    </tr>
    <% end %>
</tbody>

机构模式

class Institution < ActiveRecord::Base
  attr_accessible :company, :phone, :clientdate, :street, :city, :state_id, :zip, :source, :source2, :demodate1, :demodate2, :demodate3, :client, :prospect, :notcontacted, :solveid
  belongs_to :state
  has_many :users, :through => :company_reps
  has_many :company_reps


  def points
    points_for_client + points_for_demodate1
  end

  def hadademo
    if demodate3.present?
        demodate3.to_date
    elsif demodate2.present?    
        demodate2.to_date
    elsif demodate1.present?    
        demodate1.to_date
    else
        "No Demo"
    end 
  end

  def datebecameclient
    if clientdate.present?
        clientdate.to_date
    else
        "Not a Client"
    end 
  end

  def clientorprospect
      if client?
            "Client"
        elsif prospect? 
            "Prospect"
        else
            "No Contact"
        end 
  end

  def points_for_demodate1
    if demodate1.present? && demodate1 >= Date.new(2012, 2, 23) or demodate2.present? && demodate2 >= Date.new(2012, 2, 23) or demodate3.present? && demodate3 >= Date.new(2012, 2, 23)
      1
    else
      0
    end
  end

  def clientcount
    if client?
      1
    else
      0
    end
  end

  def points_for_client
    if client?
      10 / users.count
    else
      0
    end
  end


end

使用jQuery Datatables

jQuery ->
    $("#institutions").dataTable
      sDom: "<'row-fluid'<'span6'l><'span6'f>r>t<'row-fluid'<'span6'i><'span6'p>>"
      sPaginationType: "bootstrap"

日志文件

Started GET "/institutions" for xxx.xxx.xxx.xxx at 2012-11-13 02:51:47 +0000
Processing by InstitutionsController#index as HTML
  Rendered layouts/_messages.html.erb (1.2ms)
  Rendered institutions/index.html.erb within layouts/application (37190.3ms)
  Rendered layouts/_messages.html.erb (0.1ms)
  Rendered layouts/_navbar.html.erb (17.0ms)
Completed 200 OK in 43334ms (Views: 37983.7ms | ActiveRecord: 340.7ms)
  Rendered institutions/index.html.erb within layouts/application (34329.1ms)
  Rendered layouts/_messages.html.erb (0.1ms)
  Rendered layouts/_navbar.html.erb (23.3ms)
Completed 200 OK in 38824ms (Views: 34374.8ms | ActiveRecord: 82.2ms)

解决方法:

如果查看日志,您会发现所有时间都花在呈现视图上,而不是实际的查询上.您肯定会实现视图或操作缓存以加快此过程.

official docs将为您指明正确的方向.

mysql-在Rails中加速查询

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