Question

每次成员查看论坛上的主题/主题时，都会对主题表进行更新，以将总观看次数增加一个。

我正在回答可能的方法，不对每个视图进行更新，而是为每个主题积累视图 - （如何？）添加视图，然后通过cron定期更新总计视图 - （如何？）对更新进行排队 - 其他选择？

Answer 1

我建议使用Static variable或temp table来维护计数，然后在一段时间内更新表格。

Answer 2

您可以尝试缓存主题视图的数量，并通过cron每隔X分钟运行一次更新查询，或者检查每N个主题视图以运行查询。用户可以看到正确数量的主题/论坛视图返回缓存值使用APC

/*a small example using Topic ID and inc number*/
$TopicID=123;
if(apc_exists($TopicID)){
  echo "TotalViews : ".apc_inc($TopicID,1)."<br/>";
}else{
  // query database for numbers of views and cache that number, say its 10
 apc_store($TopicID,10);

 echo "TotalViews : ".apc_inc($TopicID,1)."<br/>";
}
/**********/
/*a larger example using a ForumIndex to hold all IDs, usefull for running a cron job and update Database*/
$ForumIndex = array(
        ("threads")=>array(
                (456) => 1000
        ),
        ("topics")=>array(
                (123)=>10
        )
);
if(apc_exists("forum_index")){ // if it exists
    $currentIndex = apc_fetch("forum_index");  // get current Index
    $currentIndex["topics"][] = array( // add a new topic 
        (1234)=>124
    );
    $currentIndex["threads"][456] += 1; // Increase threads with ID 456 by 1 view
    apc_store("forum_index",$currentIndex); // recache
    var_dump(apc_fetch("forum_index")); // view cached data
}else{ // it doesn't exists
    /*Fetch from database the value of the views */
        // Build $ForumIndex array and cache it
    apc_store("forum_index",$ForumIndex);
    var_dump(apc_fetch("forum_index"));
}
/*a cron job to run every 10 min to update stuff at database*/
if(apc_exists("forum_index")){
    $Index = apc_fetch("forum_index");
    foreach($Index as $ID => $totalViews){
        // execute update query
    }
    // delete cached data or do nothing and continue using cache
}else{
    echo "Ended cron job .. nothing to do";
}

如何在查看论坛主题时减少mysql UPDATE

2 个答案: