Need to insert 100000 rows in mysql using hibernate in under 5 seconds

Question

I am trying to insert 100,000 rows in a MYSQL table under 5 seconds using Hibernate(JPA). I have tried every trick hibernate offers and still can not do better than 35 seconds.

Answer 1

After trying all possible solutions I finally found a solution to insert 100,000 rows under 5 seconds!

Things I tried:

1) Replaced hibernate/database's AUTOINCREMENT/GENERATED id's by self generated ID's using AtomicInteger

2) Enabling batch_inserts with batch_size=50

3) Flushing cache after every 'batch_size' number of persist() calls

4) multithreading (did not attempt this one)

Finally what worked was using a native multi-insert query and inserting 1000 rows in one sql insert query instead of using persist() on every entity. For inserting 100,000 entities, I create a native query like this "INSERT into MyTable VALUES (x,x,x),(x,x,x).......(x,x,x)" [1000 row inserts in one sql insert query]

Now it takes around 3 seconds for inserting 100,000 records! So the bottleneck was the orm itself! For bulk inserts, the only thing that seems to work is native insert queries!