Server performance worsened after a hardware upgrade: how should I reconfigure the server?

Posted by twick on Server Fault See other posts from Server Fault or by twick
Published on 2012-03-15T08:26:59Z Indexed on 2012/03/19 2:07 UTC
Read the original article Hit count: 624

Filed under:

apache2

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ubuntu

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postgresql

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django

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memcached

I'm running a site on an Ubuntu/Apache/Django/PostgreSQL stack. We upgraded our server recently from 1 processor with 2 Gb total RAM (with 0.5 Gb of that RAM assigned to memcached) to a new server that has 2 processors with 4 Gb total RAM (with 2 Gb of that RAM assigned to memcached). However, when I looked at Google Webmaster Tools, I found out that the average page speed has worsened from 5 seconds to 15 seconds.

Why would performance get worse with a hardware upgrade? What should I check and tune? Is this more likely to be a problem with memcached, Apache, Django, or PostgreSQL?

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