cakephp allocate huge memory on a new server

I have a site using cakephp1.2.8 running on a ubuntu9.04 server. It works fine with 16M memory_limit. Now I moved the site to a new CentOS5.5 VPS. Then the server starts to show errors like this:

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 342095888 bytes) in Unknown on line 0

It displays pages correctly, but shows this error at the bottom. The number of bytes it tried to allocate is random. Did I miss something?

Is the new server 64bit? Does the new server have any more apache/php modules that the other?

CakePHP is fat... we have ours set to 90~MB

You can always go through your index/dispatcher/controllers and debug with the memory usage and dumps.

Also does the new VPS DB have more data? You could be pulling in to many objects with your finds, you might want to limit the query/recursiveness.

Hope it helps