undocumented side effects of turning off MTS

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02-23-2008, 08:42 AM

Grant

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undocumented side effects of turning off MTS

Hi,
Due to a bug that is application related, we have had to stop using
MTS on our database. Aside from the obvious system resource
implications of going from MTS to dedicated server mode, what other
side effects are there?

For instance, here is one that I've already encountered. Once I shut
off MTS, unbeknownst to me Oracle starting using a different value for
hash_multiblock_io_count (With MTS in use Oracle overrides the value
and sets it to 1, without MTS it went back to the default of 0) This
caused all sorts of errors with any hash join queries... then once I
specifically set the hash_multiblock_io_count parameter back to 1, the
queries worked again (but now we are having other problems which
appear to be related...)

So I'm looking for any more type of info like this... again, not
system resource oriented, but weird watch out kind of stuff.

thanks!

Grant

PS
We are still on 8.1.7.4.0

« Migrating 9 to 10g, Win2K to Linux | Oracle 9i RAC (or 10g) - mixing 32-bit and 64-bit »

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undocumented side effects of turning off MTS