Recently Robert Haas has committed a patch which allows seeing some more detailed information about current wait event of the process. In particular, user will be able to see if process is waiting for heavyweight lock, lightweight lock (either individual or tranche) or buffer pin. The full list of wait events is available in the documentation. Hopefully, it will be more wait events in further releases.
Oleg Bartunov: Today I have feeling, that our developers community needs some nostalgia.
Recently, we got access to a big server: IBM 9119-MHE with 8 CPUs * 8 cores * 8 threads. We decided to take advantage of this and investigate the read scalability of postgres (pgbench -S) at this server.