If I have a system that writes out one WAL file every 5 minutes, and I have these settings: checkpoint_timeout = 3329 checkpoint_segments = 1000 (parameters checked as valid via pg_settings) How many WAL files would you expect to see in pg_xlog, once the system has reached steady state? I would expect checkpoints to occur every 3329 seconds, giving on average 10-11 WAL files per checkpoint. So, I expect to find up to 23 WAL files in the pg_xlog directory. I have 308 files in pg_xlog, which remains constant. The oldest file time is approximately 24 hours ago. Am I just tired, or is that a little strange? pg 7.4.6 Best Regards, Simon Riggs