I'm moving from v2.2 to a fresh install of v2.5 on a different host. This seven-year-old blog has 2,241 blog entries and 24,770 comments, with 98% of those blog entries all by a single author (me). Attempting to export this blog's content simply results in the server timing out. I can export individual authors' blog entries without difficulty, so long as that individual author isn't me.
My theory is that this is simply a memory problem -- WordPress is trying to spool all of this stuff in memory before sending it to the browser as a WXR file. Before I start hacking away at export.php, I'm curious if there's a known solution.
Can anybody provide some advice?