Hosting support

I have about fifteen Drupal7 sites with Greengeeks and fifteen elsewhere. Starting sometime last year about ten of them are getting hacked and malware is getting inserted into core D7 files. They promptly shut me down (including email) until I go through their list of hacked files and clean up the site and change ftp passwords. A week later, they shut me down again and the malware is back. I of course, have all the latest core, modules and theme versions. No custom php code.

Hi, I am currently developing site at local environment. I have following question regarding the Web Hosting.

1. What is the standard practice to reach upto live website: Do person need to develop entire website on the local environment and then transfer to the web hosting. Or we can start the development on the wen host directly?

Since last time I have a problem on my domain lichtpfadstudio.com
where Drupal 7 is installed:

Fatal error: Undefined class constant 'MYSQL_ATTR_USE_BUFFERED_QUERY' in /home/lichtpfa/public_html/includes/database/mysql/database.inc on line 50 

There are no options in Cpanel to enable the PDO Module.
Currently php version 5.5 is installed as default.
I tried all php versions they have and just get different errors.

When i upload module by url or by browes to upload from pc that errors comes i am using godaddy domain i am using Linux as host

New user to Drupal and want to run OpenChurch and have it hosted on the 1and1 web hosting service.
Cannot see how to achieve this - all help gratefully received.

We are working on an application which is using Drupal 7 on (NginX + PHP-FPM). But during performance testing we have observed that Applications Server consuming very high CPU. Average CPU consumption was in the range of 90% (Max processor is consumed by PHP-FPM). Memory consumption is on very lower side.

We have tried with various Concurrent Users load like 25-50-100. But even with this User load we observed CPU consumption was ~90% due to which response time is very high.