Cpu | featured news

Around April, my VPS provider Linode announced that they’ve just finished a major $45M upgrade to their hardware and network, which means free upgrades for their existing users. The new hardware uses SSD RAID drives and faster CPUs. I hadn’t bothered because Wopular and Movies With Butter have been relatively stable.

I’m working on a new site using Drupal on a LAMP environment. One of the things I want to install is APC - Alternative PHP Cache - for opcode caching. When I did it with Wopular, I’ve noticed the effects immediately. Because the site crashed so often before using APC, I had to have a script to automatically reboot the server, fixed db errors, and reload the site whenever server resources are used up. It works, but sometimes I would end up with a corrupt database and had to spend hours to days fixing it or restoring it from a backup.

I was testing a couple of caching software to stablize the site. Wopular used to crash 3-8 times a day. I had thought the main culprit was mysql because whenever resources become low, there is a logjam of queries waiting to be processed. They eventually pile up and consume all available resources and crash the site. Since I was able to set the server to reboot whenever it's near the melting point I didn't mind it too much because it only takes about 2-5 minutes.