何時使用memcached

我喜歡memcached如何工作。您可以使用它存儲數據塊以提高網站性能。當你想檢索一些數據時，你首先檢查它是否在memcached中，如果是的話，那麼你檢索它，否則你檢查你的數據庫/文件系統等。何時使用memcached

我只是不知道如何/何時使用它？什麼會是一個好機會？

我有以下表格：

作者：

ID的用戶名郵箱密碼鹽 email_salt email_verified IP_ADDRESS

Author_threads：

的thread_id，AUTHOR_ID

主題：

ID，標題，內容，創造

標籤：

ID，名稱

Thread_tags：

tad_id，THREAD_ID

我想選擇最新的30個線程，它們的作者和他們所有的標籤。這是在SQL語句中使用：

 SELECT thread.title, thread.id as thread_id, 
     thread.content, author.username, author.id as author_id, 
     GROUP_CONCAT(DISTINCT tag.name ORDER BY tag.name DESC SEPARATOR ',') AS tags 
     FROM thread 
     JOIN thread_tags ON thread.id = thread_tags.thread_id 
     JOIN tag ON thread_tags.tag_id = tag.id 

     JOIN author_threads ON thread.id = author_threads.thread_id 
     JOIN author ON author_threads.author_id = author.id 

     GROUP BY thread.id DESC 
     LIMIT 0, 30

這是我使用PHP：

function get_latest_threads($link, $start) 
{ 

    $start = minimal_int($start); 

    $threads = sql_select($link, "SELECT thread.title, thread.id as thread_id, 
           thread.content, author.username, author.id as author_id, 
           GROUP_CONCAT(DISTINCT tag.name ORDER BY tag.name DESC SEPARATOR ',') AS tags 
           FROM thread 
           JOIN thread_tags ON thread.id = thread_tags.thread_id 
           JOIN tag ON thread_tags.tag_id = tag.id 

           JOIN author_threads ON thread.id = author_threads.thread_id 
           JOIN author ON author_threads.author_id = author.id 

           GROUP BY thread.id DESC 
           LIMIT $start, 30" # I only want to retrieve 30 records each time 
         ); 

    return $threads; 

}

在哪裏/如何將memcached的是使用嗎？

來源

2011-03-27 john mossel