Public bug reported:

Currently FTS is only approximating results when any of the *Subject
groupings are used. This means that asking FTS for 20 most recent
subjects containing "a" can right now return anything between 1 and 60
different subjects all depending on the order of recent events.

The idea here is to use xapian's collapse key functionality to be able
to get rid of this approximation while doing performance and memory
requirement measurements of its impact.

** Affects: zeitgeist
     Importance: High
     Assignee: Michal Hruby (mhr3)
         Status: Triaged

** Changed in: zeitgeist
       Status: New => Triaged

** Changed in: zeitgeist
   Importance: Undecided => High

** Changed in: zeitgeist
     Assignee: (unassigned) => Michal Hruby (mhr3)

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https://bugs.launchpad.net/bugs/947835

Title:
  FTS doesn't work properly with *Subject groupings

Status in Zeitgeist Framework:
  Triaged

Bug description:
  Currently FTS is only approximating results when any of the *Subject
  groupings are used. This means that asking FTS for 20 most recent
  subjects containing "a" can right now return anything between 1 and 60
  different subjects all depending on the order of recent events.

  The idea here is to use xapian's collapse key functionality to be able
  to get rid of this approximation while doing performance and memory
  requirement measurements of its impact.

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https://bugs.launchpad.net/zeitgeist/+bug/947835/+subscriptions

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