Why different execution times for different instances for the same query?

From: Kishore B <kishorebh(at)gmail(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Why different execution times for different instances for the same query?
Date: 2005-10-25 19:46:52
Message-ID: 42567e060510251246s1b9eda40l54e73993f8bcfb34@mail.gmail.com
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Hi All,
We are executing a single query that returned very fast on the first
instance. But when I executed the same query for multiple times, it is
giving strange results. It is not coming back.
When I checked with the processes running in the system, I observed that
multiple instances of postmaster are running and all of them are consuming
very high amounts of memory. I could also observe that they are sharing the
memory in a uniform distribution across them.
Please let me know if any body has experienced the same and how do they
resolved it.
Thank you,
Kishore.

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