Hi Emanuele,
For the next time, is best if you post to an italian mailing list if your log messages are in italian. Else change settings in order to have english errors. Back to your problem: Looks like permissions on your installation are not OK, and have been manipulated from the default ones. The fact that happens every 20 minutes, means maybe something 'scheduled' is occurring, like, eg, a query (maybe from your monitoring system), or a checkpoint. Could you please: * post the full logfile of the next line, the one on 'ISTRUZIONE' and anything else you think is relevant in the logs * tell us more about your installation (from package, compiled, which version of Postres and OS, if you did anything special after installation) *post the permissions of the folder 'base' and those of base/16395/19739338 * tell us under which user is postgres running regards, fabio pardi On 26/06/18 10:05, Emanuele Musella wrote: > Good morning, > > we have the following error: > > 2018-06-26 09:48:44 CEST ERRORE: non è stato possibile ottenere informazioni > sul file "base/16395/19739338": Permission denied > 2018-06-26 09:48:44 CEST ISTRUZIONE: select > p.datname,pg_database_size(p.datname) from pg_database p > > This error repetly every 20 minutes. > > Can you help me? > > Regards > > Emanuele Musella
