Hi, as I have written on this list before, we have had serious performance problems on one of our CMF based sites.
For a long time we believed that this was mostly due to load, and differences in our application. Unfortunately the more we searched for answers the less we understood. Recently we have converted to a ZEO setup, and that has made it much easier to locate hotspots in the application. One of things we have seen, is in our skinned 'folder_contents', which includes the name of the objects owner. This is fetched by using the 'Creator' method from the DublinCore mixin. This again calls getOwner of 'AccessControl/Owned.py'. On the first site we have set up (using the same application, whose performance currently is quite good) and folder_contents is virtualy instantaneous. Therefore we tried using the default skin. The difference was astonishing, and we are seeing a difference of 20-30 seconds. We started removing functionality, and we quickly found the culprit. In the CVS log for Owned.py it says (around 1.15.10.2): Remove cache from getOwner, since it would have cached both unwrapped and wrapped objects (caching wrapped objects being a bad thing) This change seems to be the difference between our two sites, and it will also affect other parts of our application. For instance when we reindex objects on change, since Creator is both an index and a metadata field. Can we simply change this file? What are the consequences of having or not having the cache? Arnar Lundesgaard ------------------------------------- phone: (+47) 982 38 036 mailto:arnar.lundesgaard(at)creuna.no Creuna as Bryggegata 3 NO-0250 Oslo phone office: (+47) 23 23 88 00 fax: (+47) 23 23 88 50 http://www.creuna.no/ _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
