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Change to 64bit

2 posts in General Discussion Last posting was on 2009-04-01 15:09:20.0Z
<Ingmar> Posted on 2009-03-31 14:19:20.0Z
From: <Ingmar>
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Subject: Change to 64bit
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Hello

So far we have always Sybase as a 32bit version uses ... independent if the
operating system is 32bit or 64bit.

We use mostly Windows 2003 Server (32bit), a java application (32bit with
App Server) and currently SQL Anywhere 9.0.2 .
If we use Win2003 server (64bit) ... one should SQL Anywhere as 32bit or
64bit use (if the java application stays 32bit)?
What is to consider for a switch to 64bit (SQLAnywhere) ?

Greets
Ingmar


Jeff Albion [Sybase iAnywhere] Posted on 2009-04-01 15:09:20.0Z
From: "Jeff Albion [Sybase iAnywhere]" <firstname.lastname@ianywhere.com>
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Subject: Re: Change to 64bit
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Article PK: 5873

Ingmar,

Ingmar wrote:
> So far we have always Sybase as a 32bit version uses ... independent if the
> operating system is 32bit or 64bit.
>
> We use mostly Windows 2003 Server (32bit), a java application (32bit with
> App Server) and currently SQL Anywhere 9.0.2 .
> If we use Win2003 server (64bit) ... one should SQL Anywhere as 32bit or
> 64bit use (if the java application stays 32bit)?
> What is to consider for a switch to 64bit (SQLAnywhere) ?

1. 32-bit applications can still connect to 64-bit servers.
2. Moving to 64-bit usually means one thing to most people: more memory!

Since you're on Windows, if you're using 32-bit software, you're limited
to referencing up to 4GB of memory (2^32). This is usually cut in half
due to Windows reserving 2GB of kernel space (shared amongst
applications) and leaves ~1.6GB - ~1.7GB left for the actual process
space. Without using tricks like AWE, you're very limited into how much
cache you can allocate to the server.

64-bit solves all of these problems since now we can reference up to
16.8 million terabytes (2^64) of memory. If your server isn't able to
allocate enough memory cache on 32-bit (or you're looking to allocate
more), moving to 64-bit is probably a good idea.

Regards,

--
Jeff Albion, Sybase iAnywhere

iAnywhere Developer Community :
http://www.sybase.com/developer/library/sql-anywhere-techcorner
iAnywhere Documentation : http://www.ianywhere.com/developer/product_manuals
SQL Anywhere Patches and EBFs :
http://downloads.sybase.com/swd/summary.do?baseprod=144&client=ianywhere&timeframe=0
Report a Bug/Open a Case : http://case-express.sybase.com/cx/