OleDbConnection处置速度非常慢(2s) [英] OleDbConnection Dispose very slow (2s)

问题描述

我在OleDbConnection访问同一个网络中Windows共享上的.mdb文件时遇到问题.当将其放置在使用部分的末端时，需要2秒钟以上的时间.打开连接并执行查询或填充DataTable最多需要50毫秒.

I have a problem with a OleDbConnection accessing a .mdb File on a Windows share in the same network. When it gets disposed at the end of the using part, it needs more than 2 seconds for that. Opening the connection and executing the query or filling the DataTable only needs up to 50ms.

那是我的代码:

private const string DbStConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;data source=\\master\db\datenezpz2004\dbST.mdb";
private const string DbStConnectionStringIp = @"Provider=Microsoft.ACE.OLEDB.12.0;data source=\\192.168.254.10\db\datenezpz2004\dbST.mdb";

using(var connection = new OleDbConnection())
{
    //Die richtige Verbindungszueichenfolge finden
    connection.ConnectionString = DbStConnectionString;
    try
    {
        connection.Open();
    }
    catch(OleDbException)
    {
        connection.ConnectionString = DbStConnectionStringIp;
        connection.Open();
    }
    //Command ausführen
    const string query = "SELECT ST.idst, FName FROM ST WHERE (((ST.Status) = True) AND ((ST.IDArt) = 11))"; // AND ((ST.Fname) LIKE '%{username}%');";
    using(var command = new OleDbCommand(query, connection))
    {
        using(var adapter = new OleDbDataAdapter(command))
        {
            adapter.Fill(employees);
        }
    } 
//From Here 
}
//To Here => 2 seconds

基本上，从这里"到到这里"是该代码中最耗时的部分.你有一个主意，为什么这么慢?

Basically "From Here " to "To Here" is the most time consuming part of the Code. Do you have an Idea, why it's so slow?

推荐答案

我也遇到了这个问题，除了性能甚至更差(调用Dispose大约需要20秒).一个相关问题的建议解决了该问题:在连接字符串中添加以下内容:

I also had this issue, except the performance was even worse (around 20 seconds to call Dispose). A suggestion from a related question resolved the issue: adding the following to the connection string:

OLE DB Services=-1;

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