在頁面載入時提供隨機文件時伺服器掛起

我正在優化一個網站，我現在面臨的問題是伺服器相關的。在頁面載入期間，大約有 40-50 個請求發送到伺服器（取決於頁面），並且在每種情況下，伺服器在某個文件上掛起大約 5-6 秒（主要是圖像，導致 css 和 js 正在合併） ，或兩個或三個..看看螢火蟲螢幕截圖，以更好地了解我在說什麼

http://i.stack.imgur.com/aDhih.png

（這裡有 90 個請求，因為 js 和 css 沒有合併）。

網站是Bigelow Chemists。知道可能是什麼原因造成的。我可以更深入地了解一下，我只需要提示可能導致這種行為的原因。謝謝

您的 Web 伺服器似乎未配置為處理該數量的請求。

• 啟用保持活動狀態

# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.
#
KeepAlive On

#
# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited amount.
# We recommend you leave this number high, for maximum performance.
#
MaxKeepAliveRequests 200

• 調整您的伺服器參數以有足夠數量的程序來處理並發請求

# prefork MPM
# StartServers: number of server processes to start
# MinSpareServers: minimum number of server processes which are kept spare
# MaxSpareServers: maximum number of server processes which are kept spare
# MaxClients: maximum number of server processes allowed to start
# MaxRequestsPerChild: maximum number of requests a server process serves
<IfModule mpm_prefork_module>
    StartServers          5
    MinSpareServers       5
    MaxSpareServers      50
    MaxClients          150
    MaxRequestsPerChild   0
</IfModule>

# worker MPM
# StartServers: initial number of server processes to start
# MaxClients: maximum number of simultaneous client connections
# MinSpareThreads: minimum number of worker threads which are kept spare
# MaxSpareThreads: maximum number of worker threads which are kept spare
# ThreadsPerChild: constant number of worker threads in each server process
# MaxRequestsPerChild: maximum number of requests a server process serves
<IfModule mpm_worker_module>
    StartServers          5
    MaxClients          150
    MinSpareThreads      25
    MaxSpareThreads      75
    ThreadsPerChild      25
    MaxRequestsPerChild   0    
</IfModule>

引用自：https://serverfault.com/questions/430576