Re: AS/400 and Java

[Dieter.Bender@xxxxxxxxxxx]

Scott,

Performance Capabilities Reference says that CRTJVAPGM is only faster
than JIT with level 40 and I would not use 40, this could cause
problems. Besides this the static compiled classes are only used by the
system class loader; application containers often use class loaders of
its own, wich don't care about all the CRTJVAPGM.

Dieter

Scott Johnson schrieb:
>
> Dieter,
>
> In reference to number 2, are you saying to NOT use
> CRTJVAPGM on a V5R1 or
> V5R2 box? Can you please tell me why?
>
> Thanks,
>    Scott P. Johnson
>
> > To: java400-l@midrange.com
> > Subject: Re: AS/400 and Java
> > From: Dieter.Bender@t-online.de
> > Date: Mon, 04 Nov 2002 11:49:38 +0100 (CET)
> > Reply-To: java400-l@midrange.com
> >
> > Hi,
> >
> > and here my performance tips:
> >
> > 1. read the recent manuals (Performance Capabilities
> Reference
> > recommends the JIT environment since V4R5!)
> > 2. don't use CRTJVAPGM on boxes > V4R5
> > 3. don't use the native driver, its buggy, use the
> latest Toolbox
> > driver
> > 4. don't use record level access (more IO Operations
> compared to SQL)
> > 5. run your application server on inexpensive boxes
> (Wintel, or Linux
> > on Intel), if possible (scalability)
> > 6. Don't mix Java with RPG and/or COBOL, the context
> change is very
> > expensive
> > 7. use all features of the as400 as database server,
> you've paid for
> > it
> > 8. for maximal speed with minimal hardware requirements
> use assembler
> > and shift your bytes bit by bit
> >
> > Dieter
>
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