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[Siegfried Gevatter <rainct@xxxxxxxxxx>]

*** This bug is a duplicate of bug 598666 ***
    https://bugs.launchpad.net/bugs/598666

I think I have a clue on what's going on, but before we fix this, I
guess I'd be good to have some documentation on why we even have the
cache. For this purpose, I've tried removing it from the engine (code at
lp:~zeitgeist/zeitgeist/no-table-cache, but it's not ready for merging)
and I'm attaching some test results.

It looks like the cache at best gives a very little speed benefit, so
I'm not sure it's worth keeping it.

** Attachment added: "thekorn benchmark and plot.ods"
   https://bugs.launchpad.net/zeitgeist/+bug/695087/+attachment/1778276/+files/thekorn%20benchmark%20and%20plot.ods

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https://bugs.launchpad.net/bugs/695087

Title:
  Invalid cache access

Status in Zeitgeist Framework:
  Triaged

Bug description:
  alagos@alagos-desktop:~$ gnome-activity-journal
** Message: pygobject_register_sinkfunc is deprecated (GstObject)
/usr/share/gnome-activity-journal/src/common.py:747: DeprecationWarning: object.__new__() takes no parameters
  GIO_FILES[subj] = object.__new__(classtype, *args, **kwargs)
/usr/share/gnome-activity-journal/src/activity_widgets.py:303: GtkWarning: gtk_box_pack: assertion `child->parent == NULL' failed
  self.pack_end(hbox)
Error from Zeitgeist engine: org.freedesktop.DBus.Python.KeyError: Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/dbus/service.py", line 702, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/share/zeitgeist/_zeitgeist/engine/remote.py", line 253, in FindEvents
    event_templates, storage_state, num_events, result_type, sender))
  File "/usr/share/zeitgeist/_zeitgeist/engine/main.py", line 395, in find_events
    return self._find_events(1, *args)
  File "/usr/share/zeitgeist/_zeitgeist/engine/main.py", line 382, in _find_events
    result = self.get_events(ids=[row[0] for row in result], sender=sender)
  File "/usr/share/zeitgeist/_zeitgeist/engine/main.py", line 187, in get_events
    event = self._get_event_from_row(row)
  File "/usr/share/zeitgeist/_zeitgeist/engine/main.py", line 152, in _get_event_from_row
    setattr(event, field, getattr(self, "_" + field).value(row[field]))
  File "/usr/share/zeitgeist/_zeitgeist/engine/sql.py", line 430, in value
    return self._inv_dict[id]
KeyError: 1