Jérôme, Perhaps it's a stupid question but are your queries slower than before? You didn't tell it. IMHO, it's not a problem to have a high load if you have a lot of users and your queries are fast (and with 8.1, they should be far faster than before). To take a real example, we had a problem with a quad xeon running postgres 7.4 and even when there were a lot of queries, the load was always lower than 4 and suddenly the queries were really slow and the database was completely unusable. When we upgraded to 8.1, on very high load, we had a far higher cpu load but queries were far faster even with a high cpu load. Considering your top output, I suspect you use HT and you should really remove it if it's the case. -- Guillaume
