Re: Connection.setReadOnly()

On Fri, Dec 11, 2009 at 12:57 AM, John R Pierce <pierce@hogranch.com> wrote:
>> Does the Oracle driver not follow the JDBC spec here? Or is it just that
>> long-term open transactions don't cause problems on Oracle?
>>
>
> the latter

Well eventually on Oracle you would get a "Snapshot too old" error.
Postgres chooses not to have this unpredictable error and instead have
unpredictable space usage -- it's an inevitable engineering tradeoff.

However recent versions of Oracle have tried various strategies to
reduce the frequency of this error -- likewise recent versions of
Postgres have made efforts to reduce this issue as well. If you use
8.4 you should be much less likely to run into this problem.


--
greg