OsCommerce based shop, 4images based photoforum, joomla based news agregator (news acquiring temporary disabled).
As you can guess I'm new DH customer. All of these things worked ok on previous hosting and for few days on DH hosting, but there are some problems from about 24 hours. Few minutes works great but then I just can't connect to any of my sites, I have 'waiting for server' in my browser, sometimes '500 internal server error'
I was trying 'wget' from shell and sometimes looks ok, but very often 'connecting to [my.site.adress]' takes 20 seconds and more !
I was also trying 'ab' command with very 'light' parameters:
[thing]$ /usr/sbin/ab -n 10 -c 5 http://my.site.adress/
and sometimes I have 2-4 requests per second, sometimes 0.2 (!!!) request per second, sometimes I have got errors with time limit...
I'm sure that my site (I mean my site code, scripts etc) is ok: when everything works good I've try
[thing]$ /usr/sbin/ab -n 100 -c 50 http://my.site.adress/
Time taken for tests: 10.600236 seconds
Requests per second: 18.84 [#/sec] (mean)
Time per request: 2653.285 [ms] (mean)
Time per request: 53.066 [ms] (mean, across all concurrent requests)
Transfer rate: 182.98 [Kbytes/sec] received
as you can see - looks OK
Could you run 'top' on your server and post program output? As you can see my processes use <1% of memory and up to 5% of CPU (for a very short time), but server looks quite busy. I suppose that some other user(s) utilize most of resources, but I'm not sure about that.