Live Plugin Fails

We have what I guess I would consider a rather busy install tracking about 33k visits on week days. I can throw more memory at the boxes but I wonder if there is any tweaking we can do so we don’t have to up the memory on the web servers?

Live Visitors!

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 72 bytes) in /var/www/piwik/libs/Zend/Db/Statement/Pdo.php on line 290

is it using 0.6.1? Live! isn’t supposed to select too much data.