mutiple procedures in threads

[Bernhard Geyer]

You will need to create a database connection for every thread.

But I think that this isn't a good idea because all of the data normale should be saved in a transaction to avoid data inconsistence.
If you have problems in performance we should taka a look at you code to save the data. Perhaps you have some issue that are caused by unfavorable implementation (not using of prepared statements, ...)