I'm using PDO to get data off SQL server. What I noticed is this: if the SQL server is unavailable, it takes really (relatively) long for this code to return an exception:
我正在使用PDO从SQL服务器上获取数据。我注意到的是:如果SQL服务器不可用,则此代码返回异常需要相当长的时间:
try {
$handle = new PDO($db_type . ':host='.$db_host.';dbname='.$db_name,$db_user,$db_pass);
// Tried using PDO::setAttribute and PDO::ATTR_TIMEOUT here
} catch(PDOException $e) {
echo $e->getMessage;
}
In case of MySQL it takes just over 2 minutes for the exception to occur (SQLSTATE[HY000] [2003] Can't connect to MySQL server on...) and 30 seconds on PostgreSQL (SQLSTATE[08006] [7] timeout expired).
在MySQL的情况下,异常发生只需2分钟(SQLSTATE [HY000] [2003]无法连接到MySQL服务器......)和PostgreSQL上30秒(SQLSTATE [08006] [7]超时到期)。
I tried using PDO::setAttribute and PDO::ATTR_TIMEOUT but it's not working. Which I guess makes sense, since the problem occurs before this statement.
我尝试使用PDO :: setAttribute和PDO :: ATTR_TIMEOUT,但它不起作用。我认为这是有道理的,因为问题发生在这个陈述之前。
Is there a way to set a timeout for connecting to the DB? 2 minutes/30 seconds seems really long to me for PDO to realize there is nothing there.
有没有办法设置连接到DB的超时?对于PDO而言,2分30秒对我来说似乎真的很长时间才意识到那里什么也没有。
I think I saw this being done somewhere, but can't find it again for the life of me.
我想我看到这是在某个地方完成的,但在我的生活中再也找不到它。
2 个解决方案
#1
47
$DBH = new PDO(
"mysql:host=$host;dbname=$dbname",
$username,
$password,
array(
PDO::ATTR_TIMEOUT => "Specify your time here (seconds)",
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
)
);
#2
5
I'm using the DBLIB driver for PDO - and that doesn't support the passing of options (throws a warning).
我正在使用DBLIB驱动程序进行PDO - 并且不支持传递选项(抛出警告)。
To get round this, you can edit the connection_timeout
setting in the FreeTDS config file which is located at /etc/freetds/freetds.conf
(on Ubuntu).
为了解决这个问题,您可以在FreeTDS配置文件中编辑connection_timeout设置,该文件位于/etc/freetds/freetds.conf(在Ubuntu上)。
#1
47
$DBH = new PDO(
"mysql:host=$host;dbname=$dbname",
$username,
$password,
array(
PDO::ATTR_TIMEOUT => "Specify your time here (seconds)",
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
)
);
#2
5
I'm using the DBLIB driver for PDO - and that doesn't support the passing of options (throws a warning).
我正在使用DBLIB驱动程序进行PDO - 并且不支持传递选项(抛出警告)。
To get round this, you can edit the connection_timeout
setting in the FreeTDS config file which is located at /etc/freetds/freetds.conf
(on Ubuntu).
为了解决这个问题,您可以在FreeTDS配置文件中编辑connection_timeout设置,该文件位于/etc/freetds/freetds.conf(在Ubuntu上)。