sql - How to speed up PK and index creation on Oracle -


creation of pk , index on 880 mio rows takes 1:15 hrs.

query:

 alter table stg.notes add constraint pk_notes primary key (notes_sk);  create unique index stg.bk_notes on stg.notes (note_nbr asc);

is there way speed up? read of parallel , nologging options. oracle server has 2 cpus, parallel (n-1 = 2-1 = 1) wont help. leaving nologging. can tell me it? trade off? why would/wouldn't use it?

edit: maybe need explain context of index creation is:

  1. truncate target table, drop pk , index on target table

  2. select source , bulk insert target

  3. create index , pk on target table (= 1:15 hrs)

actually can use higher degree of parallelism on pc 2 cores. check parallel_max_servers default setting in db.

show parameter parallel_max_servers

to perform in parallel can use

alter session force parllel ddl parallel 4

8 slaved created in addition coordinator.

about nologging,i think it's option. using nologging means in event of disaster you'll have recreate indexes. if index creation process routine, can consider it.


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