Parallel Degree >> how it works

Guys,

I want to create an index and I can specify parallel clause and degree. I have seen it works and I have seen PX in v$session.

But my question is, if I create the table with parallel clause and degree and do not specify parallel clause while create index, will oracle create the index in parallel

for example alter table xx parallel 20; and then I do create index .....; (did not specify paralle caluse).

I tried and I can not see PX session in v$session. Thougth to reconfirm that.

Regads

If you set object level parallelism then all the queries accessing that object will run in parallel. However, in yor case table scan will happen in parallel but index will not.

by the way, check the parallel sessions in v$px_session (especially DEGREE / REQ_DEGREE columns) & v$px_process views.

Regards,

If you want the index created in parallel you have to specify "parallel" on "create index" statement, I usually create all indexes in parallel, nologging then I add an "alter index" statement setting the index as noparallel, logging.