On 24/06/2012 12:29 PM, Pavel Ivanov wrote:
AFAIK, checkpoints are application-specific, but SQLite prohibits
second writer until first one committed its transaction and released
database lock. So there can't be such thing as "two writers, both
writing to the same DB". If one writer writes, another one is locked
out and waits. And btw checkpoint cannot be completed if there are
some application with transactions that started before last commit to
the database was made. Although partial checkpoint is possible in such
situation.

Doesn't this suggest, though, that if the first writer crashes during a checkpoint, the second writer will be forever locked out? Or is there some internal mechanism that takes care of that?

I had transactions in my code previously, but I removed them after switching to WAL, so at least that's one less worry.

   Dennis

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