I have two blogs, hosted by different companies; one uses a lot more memory than the other, and I'm at a loss to figure out why.
I installed TPC! Memory usage to measure peak usage displaying the dashboard in the admin interface. One blog peaked at 14.79 MB and the other used 23.12.
Both have the same plug-ins, both use the same theme, and both run WordPress 3.0.5. Any idea why one would use a big extra hunk of memory?