> My test databases have 10000 to 20000 records. My program "gets" every
> record and locks it
That does not say much, but I hope that you are aware of DbCache limits,
i.e. how much space is available for all accessed DBs.
Also, for the newest models locking only is not enough - DB protecting is
needed as well.
> For now, I'm just telling my customers that it's a bug in Palm OS.
I rather suspect violating the NVFS limits and rules.
Concerning MemInfo (older e-mail):
Try Off Flush, it will try to purge your records from DbCache to NVFS as
well.
But I would not rely on simulator testing. Plus simulator with debug ROM
will probably display lot of warnings.
With best regards,
Jan Slodicka
Resco, Palm Division
----- Original Message -----
From: "Terry" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[email protected]>
Sent: Tuesday, August 15, 2006 4:06 AM
Subject: Re: Databases Disappearing after Reset
>
> My test databases have 10000 to 20000 records. My program "gets" every
> record and locks it (then releases all of them and closes the database
> on quit). I bet that if I just got one at a time and released it, the
> databases wouldn't be disappearing. But, that's not an option (if I
> want decent performance) because I'm doing lots of calculations and
> sorting using data from every record.
>
> This app has been out for over a year and works on devices back to the
> Palm III and OS 3.0. Now it's having all these problems on NVFS
> devices: busy records after a reset and disappearing databases.
>
> For now, I'm just telling my customers that it's a bug in Palm OS. But,
> that answer is not satisfying to anyone - especially when these devices
> have been around for awhile now and Palm doesn't seem to be doing
> anything about it.
>
> If anyone has any other ideas, I'm up for trying.
>
> Terry
>
>
> On Aug 12, 2006, at 7:01 PM, Terry wrote:
> > Thanks for the suggestion. I did exactly what you wrote. The database
> > still disappears. I tried it three times. The error returned from
> > DmCloseDatabase is zero.
>
> [...]
>
> > On Aug 12, 2006, at 4:58 PM, Dmitry Grinberg wrote:
> >> try this:
> >> -make sure your app CLOSES the database whenit exits
> >> -download MemInfo.
> >> -run your app and modify some records
> >> -open memInfo and flush DbCache usnig MemFill Method
> >> -turn device off for 30 seconds
> >> -reset [while device is still off]
> >>
> >> see if database is gone now
> >>
> >> On 8/12/06, Terry <[EMAIL PROTECTED]> wrote:
> >>>
> >>> I've been testing my program with different size databases on a Palm
> >>> TX. Some of the databases disappear every time after a reset. Other
> >>> databases never disappear no matter what I do. It seems to only occur
> >>> with databases around 4MB to 7MB. Larger ones, or smaller ones never
> >>> disappear. The number of records does not seem to matter, just the
> >>> overall size.
> >>>
> >>> For the database to disappear, some records must have been modified
> >>> first. If I just hotsync the database, then reset, it's still there.
> >>> If
> >>> my app only reads from the database, it's still there after a reset.
> >>>
> >>> My program does not have to be running during the reset. It only had
> >>> to
> >>> have written to some records beforehand.
> >>>
> >>> Before the reset, the databases works fine. I can read and write,
> >>> quit,
> >>> run it again, and it's always there. The simulator reports no errors.
>
>
> --
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