Worse performance after upgrade to VPS


#1

After upgraded to VPS (for more memory), the service is worse than before:

[list]
[]the A record of some domains are lost
[
]a drupal site in VPS performs worse than shared hosting (lots of blank pages)
[*]DH support does not reply in last 40 HOURS!
[/list]

Any experience to share, when moving Drupal sites from sharing-hosting to VPS? Thanks

DH support please help!