count(*) is pretty slow in sqlite because it basically does select *
and then counts the results. This means it's looking through your
whole big file.
You can come up with some tricks like keeping a separate count
up-to-date with triggers. There have been some old threads on
optimizing count
Hi everybody,
I'm working on replacing a lot of Firefox's storage systems to use
sqlite. It has been going well so far except for one issue.
The database file is stored in the user's Mozilla profile directory.
In companies and Universities using Linux, this directory is often
hosted over the
. Like SQLite, it's a great piece of
> software and I'm grateful to be able to use it.
>
>
>
> Brett Wilson wrote:
> > Hi everybody,
> >
> > I'm working on replacing a lot of Firefox's storage systems to use
> > sqlite. It has been going well so far exc
I'm still concerned about the warnings on the web page about some
networked file systems not supporting locking. There will be multiple
DB connections from the same process. They might even be
multithreaded. Might we have a problem in this case?
Brett
On 9/13/05, Roger Binns <[EMAIL PROTECTED]>
The patch says "improve and support locking on the OSX platform (as
well as others)". I see at least some enums in there for MSDOS NFS,
etc.
Can anybody clarify whether this works on other platforms as well?
Basically, the question I have about this patch is: if I access the DB
from more than
Hi,
I'm working on integrating sqlite into Mozilla. The problem is that
some Linux users have their profile (and hence, database) over a
network. Ignoring the safety issues for a moment, I'm trying to get
good performance. Sometimes it takes the network "a while" to read a
page, so I'm trying to
I believe saying "GROUP BY a.primarykey" clause at the end of your
query will do what you want. It's explained in
http://sqlite.org/lang_select.html There might also be better ways of
doing it, but I'm not an expert.
Brett
On 10/6/05, Robert L Cochran <[EMAIL PROTECTED]> wrote:
> Hi --
>
> I'm
Vacuuming is just slow. I don't think there is much you can do except
don't do it unless you really need it, and don't turn on autovacuum.
Brett
On 10/26/05, R S <[EMAIL PROTECTED]> wrote:
> In my case Delete happens reasonably OK but Vaccuuming takes incredibly
> long?
>
>
> On 10/21/05, Allan,
Does anybody know if there anything special we have to do to get the
new boolean optimization? Does it apply to any 0/1 integer values you
put in a cell, or does the column have to be declared as BOOLEAN?
Thanks,
Brett
On 1/10/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> SQLite version
Hi,
I'm working on using sqlite for Firefox's bookmarks and history
system. We need to expire history older than N days when the browser
shuts down. It's currently slower than I would like and I'd appreciate
any tricks you might be able to suggest.
Database layout: We have a table of URLs and
David,
I asked a similar question, and here is drh's response to me, adapted
to your situation. I think it is probably applicable to you as well.
I'm not sure this is the type of query that can be made to go really
fast no matter what. I actually haven't gotten around to doing this
yet, so I
You could write a standalone XUL application and run it using
XULRunner, for example. That would link directly to sqlite. If you
were thinking of local web pages, you would need to write some kind of
fake web server running on a local port that would link to sqlite.
Brett
On 3/23/06, Vishal
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