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Re: InstantDB: InstantDB query


Bhavna

> 1) If I drop the table from the database, why does the tbl file still exit
> in the table folder. Is the space occupied by the deleted table ever freed?

It should get deleted. This might be a security problem, although I would have thought
that that would cause an exception.

> 2) If  I reduce the number of entries from the table from 10,000 to 1,000
> why does the file size of the tbl file remain the same. Does InstantDB
> consume alot of memory?

Deleted rows simply get marked as deleted. Their space will get reused when new rows get
added. Deleted rows get deleted in memory though. InstantDB can take up a lot of memory.
Indexes are held entirely in memory for example.

> 3) How Efficient are the table indexes? Is it wise not to use the index for
> small database as more overheaded is involved, reducing the speed? If yes
> when is it appropriate to use indexes, what database size range?

Even on relatively small databases, of less than a few thousand records say, indexes will
normally improve performance.

Pete

----- Original Message -----
From: "WG4- Khera, Bhavna" <BKhera@ICO.NEC.COM.AU>
To: <instantDB@enhydra.org>
Sent: Thursday, March 15, 2001 6:46 AM
Subject: InstantDB: InstantDB query


> Hi,
> I have certain queries regarding Instantdb
> 1) If I drop the table from the database, why does the tbl file still exit
> in the table folder. Is the space occupied by the deleted table ever freed?
> 2) If  I reduce the number of entries from the table from 10,000 to 1,000
> why does the file size of the tbl file remain the same. Does InstantDB
> consume alot of memory?
> 3) How Efficient are the table indexes? Is it wise not to use the index for
> small database as more overheaded is involved, reducing the speed? If yes
> when is it appropriate to use indexes, what database size range?
>
> Greatly appreciate the help.
> Thanks,
> Bhavna
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