Apache KeepAlive关闭被忽略，保持打开状态

My site.com.conf已将KeepAlive设置为Off。然而，当我测试一个连接是否保持活动时，我被告知它是活动的

<VirtualHost *:80>
    ...
    KeepAlive Off
    ...
</VirtualHost>

我重新启动了Apache

我还尝试直接在apache2.conf中设置它，注释掉默认的KeepAlive On，并在KeepAlive Off中写入

curl -Iv http://thisismysite.com 2>&1 | grep -i 'connection #0'
* Connection #0 to host thisismysite.com left intact