Dieter Maurer wrote: > Wichert Akkerman wrote at 2008-9-24 09:44 +0200: >> Jim Fulton wrote: >>> I'd appreciate it if people would try it out soon. >>> >> I can say that the combination of 3.8.1b8 and Dieter's >> zodb-cache-size-bytes patch does not seem to work. With >> zodb-cache-size-bytes set to 1 gigabyte on an instance with a single >> thread and using RelStorage Zope capped its memory usage at 200mb. > > I can see two potential reasons (beside a bug in my implementation): > > * you have not used a very large object count. > > The most tight restriction (count or size) restricts what can be > in the cache. With a small object count, this will be tighter than > the byte size restriction.
The object count is 650000. Without the cache-size-bytes setting this produces a memory load of about one gigabyte to one and a half gigabytes currently. > * Size is only estimated -- not exact. > > The pickle size is used as size approximation. > > I would be surprized however, when the pickle size would be five times > larger than the real size. IIRC turned into a packed Data.fs the size of the whole content is about 25 gigabytes of all typical Plone content. I think a possible interaction with RelStorage (which we asked Shane to look into) or Jim's mentioned cPersistence.h change was far more likely causing this. Hanno _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
