Eduardo Morras wrote: >> 3) Autocommit being disabled. At least when using Hibernate via JPA, >> that'll cause a major mess and would easily explain the issues you're >> seeing. Hibernate manages transactions explicitly when required, and >> expects autocommit to be off. > > Excuse me but i don't understand this point. You say that the problem happens if Autocommit is disabled but that hibernates expects that Autocommit is disabled for a correct work. What's better then? Autocommit off for Hibernate or Autocommit On for the original poster problem. Can you explain it more? Argh! I'm really sorry. I meant that Hibernate expects autocommit to be _enabled_. However, when I want back to the documentation to double-check my understanding: http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html it reads: "hibernate.connection.autocommit: Enables autocommit for JDBC pooled connections (it is not recommended). e.g. true | false" ... so now I'm confused too. I *know* I had issues initially when I disabled autocommit explicitly (particularly with explicit transaction management), and that everything works well in my app with autocommit off via the hibernate.connection.autocommit param, but that appears to conflict with the documentation. Maybe it's different when hibernate is used via the JPA APIs as I'm using it? Thanks for checking that. I guess now I'm confused too, but that's better than "knowing" something wrong. -- Craig Ringer -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance