503 Service Unavailable Error On Wordpress Hosted At Dreamhost

503 Service Temporarily Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

503 Service Unavailable Error On Wordpress Hosted At Dreamhost
If suddenly user users hit count goes high on wordpress blog then you will start seeing this error, I am looking at this error from last 7 hours, and within this seven hours, wordpress live chat did helped me to learn a lot. Here are few good links and findings.
First thing once your server comes back apply this Wordpress performance

Well What was the reason for this problem, it is Dreamhost shared hosting services have the script which kills the process if the number of hits goes some limit, and that is set by memory usage by particular process, on shared servers. Next thing to do is Finding Causes of Heavy Usage
For this you need to Enabling Shell Access for your wordpress blog/website.
And finally moving to dreamhost's private hosting service, its free for one week, here are few quick steps:
to move to the new PS server, you will want to go here: domains > manage domains
click 'edit' next to your domain; then you can move it to a different ftp user, select the 'create new user' option from the drop down menu, then set it to create the new user on your new PS, private server from dreamhost. don't forget to cheek the box, set it to 'move all files to new user'
once all the copying is done, you should see your domain start to resolve to the new location; to check this, just go to 'private servers' click 'manage resources' and done..
moving to Ps server? do i need to make any other settings?
this should be resolving as soon as dns updates for you;;
Once done with moving to PS server, use this Flush DNS but, basically it means waiting a bit for dns to udpate and that's valid reason for providing PS service free for one week's time.