From: filip.hrbek at plz.comstar.cz (Filip Hrbek)
Date: Thu, 26 May 2005 10:21:43 +0200
Subject: [Pljava-dev] optimizing java
References: <d73t3u$6h4$1@sea.gmane.org>
	<42957C9E.2030406@mailblocks.com><thhal-0IBVxA2sBzjYUGo1H4qolM4Tz5d/xU3@mailblocks.com>
	<thhal-0IRVxA20BzjYjRDI+GjmkzbyltoOWSW@mailblocks.com>
Message-ID: <003301c561cb$ff68a2b0$1e03a8c0@fhrbek>

Hello,
Thomas, I promised making some reports of memory consumption, which seems
strange to me in some cases... I am sorry but I have too much commercial
work now, we are starting a new project and the project with pl/java has
been delayed a little. But I am sure I will do it (hope soon).
I do think that the startup time is really irrelevant if one makes a good
connection pool. Once it starts, the performance is very good.

Regards
  Filip

----- Original Message ----- 
From: "Thomas Hallgren" <thhal at mailblocks.com>
To: "Marek Lewczuk" <marek at lewczuk.com>
Cc: <pljava-dev at gborg.postgresql.org>
Sent: Thursday, May 26, 2005 9:37 AM
Subject: Re: [Pljava-dev] optimizing java


> Marek Lewczuk wrote:
>
> > Is there any way to improve java VM startup overhead ? Now I use JDK
> > 1.5 and first execution of the pljava takes about 2-3 seconds. I have
> > heard that other (not from SUN) VM are much faster, is it true ?
>
> I'm sure there is. But a general rule of thumb is that the faster the
> startup, the slower the VM. The time the VM consumes at startup is often
> well spent.
>
> The absolute best approach is to minimize the number of startups (and
> the number of VM's). Make heavy use of a connection pool.
>
> Regards,
> Thomas Hallgren
>
>
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