Mailinglist Archive: opensuse (1897 mails)

[lynn <lynn@xxxxxxxxxxxx>]

On Monday 19 July 2010 13:29:39 Will Stephenson wrote:
> On Saturday 17 July 2010 19:51:19 lynn wrote:
> > Do I need these programs to run KDE4? They eat up resources (as shown by
> > 'top'), never seem to stop or use less memory and kmail is much slower on
> > starting than with 11.2.
>
> Short:
> * You do need Akonadi and Nepomuk for KMail.
>
> * However, they are a Good Thing especially if you use PIM apps like KMail,
> Kontact etc, because they actually reduce memory usage.  By splitting off
> the resources used for PIM data into a separate process, they make them
> more obvious, which can seem a bit scary.
>
> * You can disable the Strigi file indexer without affecting KMail.
>
> * The KDE team at openSUSE are on your side, we have configured thing so
> that out of the box in 11.3 Akonadi does not start up unless needed, and
> Nepomuk and Strigi are turned off.
>
> Long:
> In the 2.0 <= KDE <= 4.4 days, each program loaded the entire address book,
> calendars, and more specialised stuff like email, RSS feeds, and IM chat
> logs into its memory, so memory usage for PIM data increased linearly with
> the number of PIM apps running.  Same goes for non-PIM apps using PIM data
> (the Kickoff menu's contact search data, Konqueror's Copy To IM Contact
> feature). Because Kontact is just a shell for KMail, KAddressbook,
> KOrganizer etc, it caused the same memory multiplication even though it's
> all one process.
>
> With the Akonadi design, only the Akonadi process loads all the data into
> memory.  Each PIM app then displays a portion of that data as it needs it,
> so the amount of extra resources taken by each extra PIM app is smaller,
> and the initial amount of memory used by each app is less.  It should also
> provide extra stability, because each app no longer has to maintain its
> own data storage infrastructure, with all the caching, integrity and
> performance gotchas that keep computing science graduates employed.
>
> Currently, the migration to Akonadi is not yet complete; for example, KMail
> uses Akonadi for address book data but still uses its old storage for
> emails, same goes for KOrganizer for calendar data.  This probably
> accounts for the slower startup since 2 systems are in use in parallel.
>
> By the way, this design that splits between user interface and
> session-local data server is not new. Evolution has used it for contacts
> and calendars *finger in the air* for about 10 years now, and I'm sure
> some of the longer memories around here can point to other client-server
> PIM designs.   Akonadi extends this design for other types of PIM data and
> uses a higher performance protocol to connect the two.
>
> Nepomuk's role in this picture is to provide search and indexing; for
> example if you use as-you-type address autocompletion in KMail, this is
> done by Nepomuk and mail search will also move out there as well.  You
> *can* disable Nepomuk and use KMail but it is not recommended - expect
> these searches to stop working.
>
> Any questions?
>
> HTH,
>
> Will
Upgrade 11.2 to 11.3 nepomuk and strigi start anyway. Akonadi when I run kmail 
and strigi is still working after a 6 hour session. I'm sure that this is all 
OK it just makes for a slower machine.

Thanks L x
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