On Mon, 18 Aug 2008 13:57:16 +0200, Richard wrote:
>Hi,
>
>What is the right time to do a vacuum?
>Is it useful to do it every time you start or stop your application?
Not necessarily. Depends on the dynamics of the application.
>Or can you take a look at the pages that have been used?
That would be a good idea.
>If so how do you do that exactly?
Get total number of pages in the database:
PRAGMA page_count;
Get number of free pages in the database:
PRAGMA freelist_count;
You could vacuum if freelist_count reaches a certain
threshold, for example 40%. Alternatively, you can use
PRAGMA auto_vacuum =
0 | none | 1 | full | 2 | incremental;
PRAGMA incremental_vacuum(N);
http://www.sqlite.org/pragma.html#pragma_incremental_vacuum
>Thanks,
>Richard
--
( Kees Nuyt
)
c[_]
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