Hi all The past few weeks I've been optimizing a busy Plone site and so collective.catalogcache was born. It uses memcached as a distributed ZCatalog cache. It is currently in production and seems to be holding just fine. The site went from being unusable to serving quite a bit of data. I'll modify it in future to not be too tied to just memcached, but that's still some way off. BTW, if you do not have memcached available the catalog functions as usual. It's only been tested for Zope 2.9.6 - 2.10.6. The repo is at http://dev.plone.org/collective/browser/collective.catalogcache. The URL may contain the word Plone but it's all Zope :) The readme contains more info and instructions. The product is a monkey patch to Catalog.py. I'd love some feedback and suggestions. Hedley