[Bug 289431] New: Massive reindexings with KDE 4.8 and latest stable shared-desktop-ontologies.

[Alejandro Nova]

https://bugs.kde.org/show_bug.cgi?id=289431

           Summary: Massive reindexings with KDE 4.8 and latest stable
                    shared-desktop-ontologies.
           Product: Akonadi
           Version: 4.8
          Platform: Unlisted Binaries
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Nepomuk Feeder Agents
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: alejandronova at gmail.com
                CC: vkrause at kde.org


Version:           4.8 (using Devel) 
OS:                Linux

This is a complex report, and I will need some help to fully understand it.

1. The akonadi-nepomuk-feeder is indexing mails one by one in KDE 4.8 RC1.
2. The mail indexing process is a terribly inefficient one.
3. All of that results in:
a) lots of CPU being wasted by Virtuoso. This is pure waste (i.e. strace gives
me this: futex(0x2abf454, FUTEX_WAIT_PRIVATE, 109, NULL))
b) reindexing after reindexing. The Akonadi Nepomuk feeder simply doesn't know
when it has indexed something, so, whenever I reboot or restart my session, it
simply starts over.

Reproducible: Always

Steps to Reproduce:
1. Setup 2 separate mail accounts, one with POP3 and the other with IMAP.
2. Enable the Akonadi Nepomuk Feeder agent.
3. Watch it index your mails.

Actual Results:  
- Virtuoso CPU usage stays at 100% for a long passage. It will eventually
normalize, after ~18 hours of uptime, with 2 mail folders totalizing 40,000
mails.
- Mail indexing takes an abnormally long time (a full Strigi indexing of my
home folder takes a lot less)
- Akonadi Nepomuk feeder can't identify already indexed mail, so, it always
starts from scratch.

Expected Results:  
- Virtuoso CPU usage stays normal. It spikes only when actually working.
- Virtuoso can know when something has been indexed and when something hasn't.
- Mail indexing takes less than a full Strigi indexing of my home folder.

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