[GENERAL] Performance counters?

[Cestmir Hybl]

Hello   Does psql maintain some sort of global performance counters?   We are interested mainly in following counters (cumulative, by all psql processes): - cpu time by all backends - sql queries count - fsync count - disk reads / disk bytes read - disk writes / disk bytes written - transaction commit count - client connect count - client disconnect count - backend start count - backend terminate count   We intend to use these counters (their differences for fixed time periods) for monitoring and reporting purposes.     Thanks,   Cestmir Hybl