FM <dist-list@xxxxxxxxxxxxxxxxxx> writes: > What is strange is that users on all DB (not only DB1) are affected by > the JBOSS <idle in transaction>. > I understand that it locked DB1 but why it also locked users on others DB ? You should define "locked" more carefully: exactly what behavior are you seeing that you don't like? If it's a matter of whether VACUUM removes rows or not, that's expected: open-transaction bookkeeping is done across the whole cluster. (This is not something simple to change, since we may have to consider transaction IDs in shared catalogs.) regards, tom lane