Does mts affect explain plans of queries

Hi everyone,

I have a development, test and production databases (They are on HP-UX 11.0 with Oracle 8.1.7.4). The development and test databases are setup for Multi Threaded Server (MTS) and production is not (We are still considering whether or not to put it on production, another story). But during the normal day, code is built, changed and tuned. I don't have any particular example, but some of the code that works fine in development and test works very differently in production. The data that exists in development and test is comparable to what is in production. The only difference I see is that development and test are using MTS and production is not.

The questions I see are: Would mts affect explain plans of queries to such a degree that they would run differently in a non MTS database? Does the optimizer care whether mts is being used?

TIA, Bryan Rodrigues
DBA Received on Thu Jul 24 2003 - 12:31:00 CDT