Hello all, I have a setup in which four client machines access a Postgres database (8.1.1) running on a Linux box. So, there are connections from each machine to the database; hence, the Linux box has about 2 postgres processes associated with each machine. I am using the JDBC driver (postgresql-8.1-404.jdbc3.jar) to talk to the database. I am also using the Spring framework(1.2.2) and Hibernate (3.0.5) on top of JDBC. I use Apache's DBCP database connection pool (1.2.1). Now, there is one particular update that I make from one of the client machines - this involves a reasonably large object graph (from the Java point of view). It deletes a bunch of rows (around 20 rows in all) in 4-5 tables and inserts another bunch into the same tables. When I do this, I see a big spike in the CPU usage of postgres processes that are associated with ALL the client machines, not just the one I executed the delete/insert operation on. The spike seems to happen a second or two AFTER the original update completes and last for a few seconds. Is it that this operation is forcibly clearing some client cache on ALL the postgres processes? Why is there such an interdependency? Can I set some parameter to turn this off? Regards and thanks, S.Aiylam ____________________________________________________________________________________ Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html
