php 通过 pdo 长连接链接pgsql 但是pgsql连接数会不断增加而不是复用一个链接

__都付笑谈中 2016-07-15 04:32:42

现在问题是，用pdo的做的长连接链接的pgsql，但是每次访问页面pgsql的链接数都会不断增加，而不是去用缓存好的连接，并且当一个用户操作时会涨到11个左右就不会继续增加，然后再多一个用户访问连接数又会增加增加到19个左右又不增加了，再增加个用户会涨到20多个。求大神们支援

//数据库链接代码 db.class.php



/**

 * 数据库构造函数

 */

public function __construct() {

//        $this->memcache = $this->getMemecacheObject();

        /** 单一实例 PDO对象 */

        if (!self::$PDOInstance) {

                $this->config = json_decode(file_get_contents(ROOT_ADDR."/private/config/db.json"), true);



                $config = $this->config;

                $host = $config["data_base"]["db_host"];

                $dbname = $config["data_base"]["db_name"];

                $port = $config["data_base"]["db_port"];

                $username = $config["data_base"]["db_user"];

                $password = $config["data_base"]["db_pwd"];



                if ($config["data_base"]["db_host"] != 'localhost') {

                        $hosturl = "host=$host;";

                }



                try

                {

                        self::$PDOInstance = new PDO("pgsql:"

                                . $hosturl

                                . "port=$port;"

                                . "dbname=$dbname;"

                                , $username

                                , $password

                                , array(

                                        PDO::ATTR_PERSISTENT => true,

                                )

                        );

                } catch (Exception $ex) {

                        $tools = new tools();

                        $path = $tools->log("数据库初始化失败，已强制断开链接。<br/>抓取到的异常栈如下：<br/><pre>" . print_r($ex, true) . "</pre>", 'db');



                        header("Content-type:text/html;charset=utf-8");

                        if ($config["SYSTEM"]["DEBUG"]) {

                                echo "数据库初始化失败，已强制断开链接。<br/>详细信息请访问{$path}文件日志";

                        } else {

                                echo "数据库初始化失败，请联系系统管理员。";

                        }

                        die();

                    }

                try {

                     self::$PDOInstance->query("SET client_encoding='UTF-8';");

                     self::$PDOInstance->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);

                    self::$PDOInstance->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

                 } catch (Exception $exc) {

                     $this->pdo=NULL;

                $doc = <<<DOC

            <!DOCTYPE html>

            <html>

                <head>

                        <meta charset="UTF-8">

                        <script src="layer/jquery-1.11.1.min.js"></script>

                        <script src="layer/layer.js"></script>

                <head>

            <body>

DOC;

                print $doc;

                $info=L('服务器变更请刷新');

                print("<script>layer.msg('".$info."', {icon: 2,time: 30000},function(){location.reload();});</script>");

                print('</body></html>');

                 self::$PDOInstance=NULL;

                exit();

                }

        }

        

        

        $this->pdo = self::$PDOInstance;

        $this->getconnect_server();

}

//每个模块需要做数据库操作时，model层会去执行下父类(db.class.php)的构造方法然后进行数据库操作



public function __construct($data) {

		parent::__construct();

}

[root@asg omp]# ps -aux | grep post | grep omp
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ
postgres 31717 0.1 0.2 199876 8864 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43255) idle
postgres 31725 0.2 0.2 200032 9964 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43256) idle
postgres 31787 0.0 0.1 199568 5496 ? Ss 16:25 0:00 postgres: ompuser OMPDB [local] idle

[root@asg omp]# ps -aux | grep post | grep omp
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ
postgres 31717 0.0 0.2 199876 8864 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43255) idle
postgres 31725 0.1 0.2 200032 9964 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43256) idle
postgres 31787 0.0 0.1 199568 5496 ? Ss 16:25 0:00 postgres: ompuser OMPDB [local] idle
postgres 32234 0.2 0.2 199924 8352 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43257) idle
postgres 32254 0.1 0.1 199724 7516 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43258) idle

[root@asg omp]# ps -aux | grep post | grep omp
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ
postgres 2954 0.0 0.1 199660 6752 ? Ss 16:30 0:00 postgres: ompuser OMPDB asg.localdomain(43261) idle
postgres 2956 0.0 0.1 199724 7496 ? Ss 16:30 0:00 postgres: ompuser OMPDB asg.localdomain(43262) idle
postgres 2966 0.2 0.2 200216 8632 ? Ss 16:30 0:00 postgres: ompuser OMPDB asg.localdomain(43263) idle
postgres 2967 0.0 0.1 199660 6748 ? Ss 16:30 0:00 postgres: ompuser OMPDB asg.localdomain(43264) idle
postgres 2968 0.0 0.1 199660 6760 ? Ss 16:30 0:00 postgres: ompuser OMPDB asg.localdomain(43265) idle
postgres 31717 0.0 0.2 200068 9144 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43255) idle
postgres 31787 0.0 0.1 199568 5496 ? Ss 16:25 0:00 postgres: ompuser OMPDB [local] idle
postgres 32234 0.0 0.2 199924 8352 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43257) idle
postgres 32254 0.0 0.1 199724 7516 ? Ss 16:25 0:00 postgres: ompuser OMPDB asg.localdomain(43258) idle

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