<blockquote> At least, when having maxthreads==minthreads, we saw a
monotone increase of memory usage, sometimes being very
close to or reaching swapping. Even with a very low
number of connection threads it was a question of time.
So we configured AOLServer to kill its threads after
about an hour by setting maxthreads=25, minthreads=20 and
threadtimeout=3600. This seems to work stable (knocking
on wood 😊 ).
</blockquote>
Interesting! We're seeing memory growth too, even with beta26. I've just modded our config file to match your settings.