Oracle持久连接最大化服务器与异步PHP脚本

Question

I have written a simple OCI wrapper class in PHP which uses persistent connections (oci_pconnect). The class destructor calls oci_close.

This class is used for all my AJAX PHP scripts and so is called a lot. However, despite using persistent connections and oci_close not removing these from the cache (as per my understanding), the number of open connections to the database is maxing out, causing the system to fail. I was expecting the number of open connections to be just one for the whole app!

Am I doing something obviously wrong?

---

Skeleton code:

class Oracle {
  private $connection;
  private $connected;

  function __construct($connectionString, $username, $password) {
    if (!($this->connection = @oci_pconnect($username, $password, $connectionString))) {
      echo 'Cannot connect to '.$username.'@'.$connectionString;
      $this->connected = false;
    } else {
      $this->connected = true;
    }
  }

  function __destruct() {
    if ($this->connected) {
      oci_close($this->connection);
    }
  }
}

Answer 1

Do NOT close the connection if you want it to be persistent.