[ZODB-Dev] ZODB growing / What triggers a transaction? (Geändert von jdb30570@gmx.net)

[jdb30570 at gmx.net]

Hello everyone!

I am the proud owner of a massively growing ZODB. I realized that my 
product claims several gigabytes of additional hard disk storage every 
day. I can deal with it by packing the database each night, but that is 
certainly not the solution.

The problem is: I have custom file and container classes derived from 
File and Folder. Each of these inherits from a class called 'UserAware' 
which implements user specific features, such as a list of recently 
visited items. Everytime a user hits such a container or file through 
the web the complete object (including parent objects) is copied in the 
database. I am aware of the fact that Persistent traps changes made to 
the object and SimpleItem implements the undo feature, but the curious 
thing is that calling index_html on these objects does not change their 
state nor do I manually flag them (_p_changed=1). The only changes I 
commit are those on the user object through methods of UserAware.

What is going on here? I am grateful for any ideas.

Best regards,
Moritz H.

(Configuration: Zope 2.7.0, Python 2.3.2, ZODB.__init__ says 
__version__ = 3.2.1)