I have a Linode that has Ubuntu loaded and am hosting a WordPress site. I would like to optimize my site so that I no longer get Out of Memory errors like the following:
Killed process 16660 (apache2) total-vm:186232kB, anon-rss:87404kB, file-rss:0kB
I have 512 MB of RAM and whenever I get a spike of 500+ users trying to access the site, the site becomes unresponsive and I start getting the errors above.
What optimizations can I make to help improve site performance?