[eclipse-clp-users] Hunting for bottlenecks: Is factbase stored on-disk?

From: -dp- <david_at_...151...>
Date: Tue, 4 Sep 2012 09:45:04 +0800
We have a Java-embedded ECLiPSe 6.1 process running on Win7 Pro 64-bit
2.67GHz that takes more than two weeks to run, but all the while the CPU
and RAM utilization is quite low. We are looking for ways of increasing CPU
utilization in order to shorten the run time.

One of our colleagues speculated that "you are doing lots of read or write
to your database on the disk and that is causing the IO bottleneck." Is any
of the ECLiPSe database kept on disk instead of RAM?

Any suggestions on where our bottleneck might be?


btw, my own speculation is that, because we have 250,000+ facts with the
same functor, that the long runtime is due to serially attempting matches
across most or all of those facts. We are looking into storing few facts or
using more functors, but I've wondered if Google's parallelization of graph
search algorithms in BigQuery might someday come to ECLiPSe to allow
parallel search for backchaining.
Received on Tue Sep 04 2012 - 02:53:15 CEST

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