Teradata多个连接INSERT死锁

Question

I create multiple connections and make batch inserts into myTable simultaneously (multi threading)

insertString = "INSERT INTO ... + values + ") "; 
insertTable.addBatch(insertString); 
insertTable.executeBatch();
insertTable.clearBatch(); 

Sometime it works fine, however in other cases it hangs. I understand this is because I am inserting into the same table so it gets locked .

How can I write an INSERT statement such that it does not lock the table?

Are there any special transaction start . . transaction start . . commands that can prevent the table from being locked ? In addition, I am curious why it works fine sometimes ?

PS: the maximum number of connections that I used was 1024 (worked perfect sometimes)

Thanks

Answer 1

1024 session is totally insane. Your DBA should block your user for that.

You probably get blocked sessions when you load multiple rows with the same PI.

Single-row INSERTs are the slowest way to load data. A single session with a batch size of a few 1000 will outperform dozens of single-row sessions (but then only use one session).

Or switch to JDBC FastLoad if the target table is empty.

Check http://developer.teradata.com/connectivity/articles/speed-up-your-jdbcodbc-applications

Is this a staging table?