Re: Speed issues?

["Robert Upshall" <rupshall@xxxxxxxxxxx>]

David,

Thanks, I'll look at those places to see what I can find out and I'd gladly
take any examples you are will to give me.

Thanks,
Robert

----- Original Message -----
From: "David Morris" <David.Morris@plumcreek.com>
To: <java400-l@midrange.com>
Sent: Tuesday, July 16, 2002 2:52 PM
Subject: Re: Speed issues?


> Robert,
>
> I have used the Commons pool, Commons DBCP, and Tyrex Pooling on the
> iSeries. These all work fine. Be careful with the Commons code because
>
> there is very little documentation and it is easy to code a wait on
> pool
> resources that will never exist. I could give you some examples if it
> would help along with a home grown cache I wrote. You might also
> check out the Avalon project for caching code that is part of
> Excalibur. I
> looked into their implementation and it was based on a LRU algorithm
> that
> did not work well for my needs so I ended up creating my own
> implementation
> and posting a description of that algorithm to the Avalon developer's
> list.
>
> David Morris
>
> >>> rupshall@psasoft.com 07/16/02 01:21PM >>>
> I think even though you caught the end, you hit the nail on the head.
> I had
> an idea that implementing a thin client with a server on the backend
> would
> help things but it is out of my league to try and write a true
> client/server
> implementation.  If they are Open Source solutions that may help me
> then I
> have something else to research.
>
> I have a few things to try now and I don't know what method will work
> best,
> I'll probably need to implement a mixture of all.
>
> Also, do all the below mentioned pooling tools work on an AS400
> environment?
>
> Robert
>
>
>
> ----- Original Message -----
> From: "David Morris" <David.Morris@plumcreek.com>
> To: <java400-l@midrange.com>
> Sent: Tuesday, July 16, 2002 1:14 PM
> Subject: Re: Speed issues?
>
>
> > Robert,
> >
> > For some reason I only caught the tail end of this so I may not
> > understand the
> > speed issue, but it sounds like you have a GUI (swing?) thick client
> > that is not
> > performing well. One thing that can help performance is pooling of
> > objects and
> > connections. If you don't have a server component, it is going to be
> > difficult
> > to efficiently pool resources and scalability will likely be an
> issue.
> >
> > There are all kinds of schemes and tools you can use to pool or
> cache
> > resources
> > but they work best when you have a common access point. I have used
> the
> >
> > Apache Commons pooling and DBCP support and they work well on the
> > iSeries.
> > If you decide to use these be aware that they are not well
> documented
> > and
> > that it is easy to end up in a never ending wait. Two other open
> source
> > projects
> > that provide pooling implementations are Poolman and Tyrex. These
> last
> > two
> > seem to be losing momentum where the Commons projects are immature
> but
> >
> > gaining momentum.
> >
> > David Morris
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