Oracle FAQ | Your Portal to the Oracle Knowledge Grid |
Home -> Community -> Usenet -> c.d.o.server -> Re: 32 bit oracle on Solaris 9 64 bits ?
Thanks a lot for your time.
"Joel Garry" <joel-garry_at_home.com> a écrit dans le message de
news:91884734.0310311515.53b884d2_at_posting.google.com...
> "Sean Chang" <sean_at_cnfei.com> wrote in message
news:<3fa2908e_3_at_corp.newsgroups.com>...
> > Comments inline.
> >
> > > I just bought a new sun server (280R) and I plan to run solaris 9 on
it in
> > > 64 bits mode,
> > > which I think is the default when you install (Can anyone confirm this
?)
> >
> > Yes, 64-bit is the default. You should never change to 32 bit OS
> >
> >
> >
> > >
> > > Should I run oracle 64 bits edition on it, or would oracle 32 bits
edition
> > > run just fine ?
> >
> > We run an Oracle DB of 32 bits in 64-bits Solaris (8 ,9) for more
> > than 2 years now. Performace is good, also very stable.
> >
> >
> > > I heard that the 64 bit edition was slower and I don't need a HUGE
SGA,
> > and
> > > I will probably
> > > have older 32 bit oracle OCI apps running that I cannot recompile.
> > Oooh, scary Halloween! :-O > > They are supposed to work, but those shared libraries... you just > never know until you try. Hopefully it will only be an issue when > recompiling. >
> > http://www.sun.com/sun-on-net/itworld/UIR951101perf.html > > Metalink Note:107201.1 says "32-bit databases run on systems with a > small number of 32-bit CPUs (4-6) may see some degradation in > performance if moved to 64-bit systems also with a small number of > 64-bit CPUs. > > Applications will achieve the benefits of improved scalability on-64 > bit machine only if they are memory intensive. 64-bit applications > have bigger data structures because memory has to be addressed with a > larger number of bits. Larger data structures translate into > addtional memory requirements per process. > ... > > When running 32-bit Oracle binaries on a 64-bit machine, you will have > to set SHMMAX to 1GB exactly. This is an important requirement when > you want to extend the SGA beyond the 1GB. " > > Note that you can have a huge SGA with 64-bit, if you can afford the > physical memory and checkpointing penalties. The general idea is that > not having to go to disk is an advantage over the penalties. For the > same init.ora configuration, 64 bits will need more physical memory. > >
> > Watch the Oracle certification matrix for bit availability when > upgrading. > >
> > My general bias is spring for the physical memory and run 64 bit, > since most businesses eventually want to calculate things. And don't > run unsupported software that has no ability to recompile/reinstall. > > jg > -- > @home.com is bogus. > http://www.infoworld.com/article/03/10/31/HNmsgoogle_1.htmlReceived on Mon Nov 03 2003 - 09:38:32 CST