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Operating Systems AIX migrating solaris DB servers to AIX - resources ? Post 302367556 by zxmaus on Tuesday 3rd of November 2009 03:10:57 AM
Old 11-03-2009
migrating solaris DB servers to AIX - resources ?

Hi Guys,

I have a new project where I have to migrate about 150+ database environments from various solaris systems running Solaris 8 / 10 and residing on very different sun boxes (from 25k down to ancient/unsupported hardware) to AIX (power6).

As special bonus for me, about half of these DBs are supposed to become migrated to Oracle once stable as Sybase DBs on AIX.

I know that I can use the RPE2 values to estimate the cpu requirements - but since the memory needs on Solaris seem pretty different from AIX, is there any safe way to estimate at least roughly the memory needs on AIX? For Sybase I can probably choose the value that's assigned to ASE and add 2-4 GB memory for the system and should be safe - but what do I do with oracle since here the memory usage seems to be highly depending on the DB connections and what they're doing?

Has anybody done similar tasks in the past and would be happy to share experiences.

Thank you and regards
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DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars(3pm) User Contributed Perl DocumentationDBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars(3pm)

DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars - Storage::DBI subclass for Sybase ASE without placeholder support DESCRIPTION
If you're using this driver then your version of Sybase or the libraries you use to connect to it do not support placeholders. You can also enable this driver explicitly using: my $schema = SchemaClass->clone; $schema->storage_type('::DBI::Sybase::ASE::NoBindVars'); $schema->connect($dsn, $user, $pass, \%opts); See the discussion in "Using ? Placeholders & bind parameters to $sth->execute" in DBD::Sybase for details on the pros and cons of using placeholders. One advantage of not using placeholders is that "select @@identity" will work for obtaining the last insert id of an "IDENTITY" column, instead of having to do "select max(col)" in a transaction as the base Sybase driver does. When using this driver, bind variables will be interpolated (properly quoted of course) into the SQL query itself, without using placeholders. The caching of prepared statements is also explicitly disabled, as the interpolation renders it useless. AUTHORS
You may distribute this code under the same terms as Perl itself. perl v5.14.2 2010-06-03 DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars(3pm)

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