From: | "Thomas Hallgren" <thhal(at)mailblocks(dot)com> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: pljava revisited |
Date: | 2003-12-10 20:39:01 |
Message-ID: | br803u$17dd$1@news.hub.org |
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Lists: | pgsql-hackers |
Two comments.
Context switches are of course much cheaper then loading a JVM. No argument
there. The point is that the JVM is loaded once for each connection (when
the connection makes the first call to a java function). Millions of calls
may follow that reuses the same JVM. Each of those calls will suffer from
context switches if the JVM is remote. A 1 to a million (or more) ratio is
in fact very likey when function calls are used in predicates and/or
projections of selects on larger tables.
Regarding C++, as I said, no big deal. I'll change it for the reasons
mentioned before I release my first cut.
Thanks,
- thomas
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