Hi Tom: >> I'm having problems wherein my print() statements inside my plpython stored proc are not appearing in postgresql log. I tried setting the file=sys.stderr > Hmm. I can tell you that with "logging_collector = on", I would only expect the logs to capture stderr output, not stdout. So it makes > sense to me that plain "print" would disappear into the bit bucket. But if you specify stderr output, it ought to work. I don't know > enough Python to know why it's not working, but it seems to me this is primarily a Python question not a Postgres question. Maybe you need > an explicit fflush-equivalent step? Dunno. > regards, tom lane As usual, thank you for pointing out where problem lies. I made it work by adding flush=True flag to the print() statement. print("oink oink", file=sys.stderr, flush=True) I was under the wrong impression that output to stderr are automatically flushed. Thank you once again. Regards, Ludwig