Question

为什么从Codeigniter 3.0 PHP连接时，所有会话的SQL Server @@ spid都相同？

我已成功从Codeigniter 3.0.2连接到SQL Server。我正在使用sqlserv驱动程序。为什么SQL Server @@ spid总是为不同的用户会话返回相同的内容我的数据库连接未设置为Persist。我怎么能让它不坚持。这是我的数据库连接。

$db['default'] = array(
    'dsn'   => '',
    'hostname' => '127.0.0.1',
    'username' => 'user',
    'password' => 'password',
    'database' => 'Testdb',
    'dbdriver' => 'sqlsrv',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

我从codeigniter尝试了同样的Mysql Connection。它按预期工作非持久性。？

Answer 1

参考以下链接， https://msdn.microsoft.com/en-us/library/cc644930%28SQL.90%29.aspx

连接池（适用于SQL Server的PHP的Microsoft驱动程序）

以下是有关SQL驱动程序的PHP驱动程序中的连接池的重要注意事项：

The Microsoft Drivers for PHP for SQL Server uses ODBC connection pooling.

By default, connection pooling is enabled. When you connect to a server, the driver attempts to use a pooled connection before it creates a new one. If an equivalent connection is not found in the pool, a new connection is created and added to the pool. The driver determines whether connections are equivalent based on a comparison of connection strings.

When a connection from the pool is used, the connection state is reset.

Closing the connection returns the connection to the pool.

我可以通过设置

解决问题

$db['default'] = array(
    'dsn'   => '',
    'hostname' => '127.0.0.1',
    'username' => 'user',
    'password' => 'password',
    'database' => 'Testdb',
    'dbdriver' => 'sqlsrv',
    'dbprefix' => '',
    'pconnect' => TRUE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

当我设置pconnect'=＆gt;是，'app_id'=＆gt;''。rand（）在连接期间，新的@@ SPID已创建。

因此，通过有效地设置'app_id'，可以控制应用程序或用户组或用户的池化

警告：通过设置pconnect'=＆gt;是的，'app_id'=＆gt;''。rand（），您实际上是在使应用程序中的连接池效果无效。建议小心使用。

Codeiginiter SQLServer连接是否会一直存在？可以从Codeigniter for MSSQL Connection连接非持久性

1 个答案: