RE: db_recovery_file_dest_size
- From: "Crisler, Jon" <Jon.Crisler@xxxxxxx>
- To: "Jared Still" <jkstill@xxxxxxxxx>
- Date: Wed, 31 Dec 2008 13:17:39 -0500
Sure, understood. Virtualization is pretty cool and has its place, but
it has to be used wisely. High stress mission-critical environments
that I would not hesitate to put on any other vendors hardware or OS,
including RH Linux, IMO should never be put under VMware...performance
is so bad. My findings are that production databases just don't belong
on VMware unless the application is really small. You really hit the
nail dead-on- its got to be low stress (i.e. light activity). Although
performance is my big complaint, reliability seems to be fine.
________________________________
From: Jared Still [mailto:jkstill@xxxxxxxxx]
Sent: Wednesday, December 31, 2008 1:06 PM
To: Crisler, Jon
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: db_recovery_file_dest_size
On Wed, Dec 31, 2008 at 9:05 AM, Crisler, Jon <Jon.Crisler@xxxxxxx>
wrote:
Jared, I cringed when I saw your sentence advocating
virtualization to address this problem. In my experience putting
Oracle on a virtual server is a cure worse than the disease, at least
where Xen and VMware are concerned. They are great for test / dev / qa
systems, as long as the performance equation is ignored :-) Come to
think if it, this applies to MS SQL Server and MySQL as well. If
performance is important, or at least consistent performance is
required, virtualization with Vmware or Xen supporting databases on
either Linux or Windows has been a colossal disappointment for me.
Sorry Jon, I didn't really mean to be an advocate for virtualization of
Oracle datababases.
I don't really care for it too much myself, except in limited
circumstances.
eg. I am using a virtual linux server for a replicated OID environment.
This is a very
low stress application, (db names resolution only) so no problems there.
The parameter under discussion seemed that it may well lend itself to
use in
virtual environments.
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
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