I have a client who is not using Thematic, but a free theme that someone hacked into shape for him (and didn't do the best job, IMHO). He has 100,000s of page views per month. He recently moved the site to a VPS, and they are constantly having to reboot the server for him, as it stopped responding due to an "Out of memory" error. They explain that he needs to "either . . . optimize scripts and mysql queries under this vps to avoid further stability issues" or buy more memory. Since he already has a lot of memory, I am thinking his theme and the queries therein might be an issue.
Question: Are the scripts and queries in Thematic considered "optimal" in this regard? If he switches to a Thematic-based theme, is there a chance that the scripts would be considered "optimal" in this context, meaning that he truly needs to buy more memory? I looked around the forum, and couldn't find anything on this. Likewise googled the issue, and it seems to be a common problem, so I don't know if its because of an inherent WP issue, or a theme-based issue?
You Thematic ninjas out there, thanks in advance for any help.