Good morning,
Trying to insert into one table with 1 million records through java
JDBC into psql8.3. May I know (1) or (2) is better please?
(1) set autocommit(true)
(2) set autocommit(false)
commit every n records (e.g., 100, 500, 1000, etc)
It depends on what you need.
Data will be available to concurrent processes earlier with (1), while
(2) will go faster.
No need to worry about the lock/loosing records because after data
loading will do a check. For now, I'd like the fastest way. Would
you suggest commit every 1000 or 3000 records?
The improvement drops off pretty quickly in my experience, but it
depends on the size of the records and other things.
The table is huge with almost 170 columns.
Try it and see..? It's almost certainly going to depend on your
specific environment.
Can you let me know what are the "specific environment" please? Such as:
......
By the way, could someone let me know why set autocommit(false) is for
sure faster than true please? Or, some online docs talk about this.
Thanks a lot!
Emi
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