Centuries ago, Nostradamus foresaw when quick.nitin@gmail.com ("nitin quick") would write:
> by realtime i mean predictivity of query response time. I do agree
> it may vary transacion to transaction but there may be some time
> factor which i can say i will get response in so many
> millseconds. This idea of mine is very naive. If i am conceptually
> wrong please correct me or if you can guide me in this matter i will
> appreaciate the effort. regards quick nitin
Conceptually, you're right about what real time means; it's all about
seeking guarantees about worst-time performance that they will not
exceed some pre-defined thresholds.
With a relational database, you're requesting a declarative and
decidedly non-deterministic approach to things, and it doesn't seem
reasonable for that to be compatible with hard RT requirements on
worst-time performance.
--
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