Usually, this is done by logrotate or a similar mechanism in your system. You’ll likely find that other logs in your system follow a similar pattern, not just Postgresql.
On Dec 4, 2019, 3:21 PM -0800, Rich Shepard <rshepard@appl-ecosys.com>, wrote:
Running Slackware-14.2/x86_64 and postgresql-11.5.
In /var/log/ are these files:
-rw-r----- 1 postgres wheel 0 Nov 23 04:40 postgresql-11
-rw-r----- 1 postgres wheel 723 Nov 23 04:40 postgresql-11.1
-rw-r----- 1 postgres wheel 324 Nov 20 04:40 postgresql-11.2.gz
-rw-r----- 1 postgres wheel 320 Nov 17 04:40 postgresql-11.3.gz
-rw-r----- 1 postgres wheel 322 Nov 14 04:40 postgresql-11.4.gz
-rw-r----- 1 postgres wheel 321 Nov 10 04:40 postgresql-11.5.gz
-rw-r----- 1 postgres wheel 325 Nov 6 04:40 postgresql-11.6.gz
-rw-r----- 1 postgres wheel 337 Oct 23 04:40 postgresql-11.7.gz
I assume that they're an automatic backup that runs every 3-4 days. What's
backed up and where is this controlled?
I ask because I have a cron job that does a pg_dumpall each night at 11:30
pm. (It's a small installation for my business use so the files are not
excessive and I keep them for only short periods.)
Regards,
Rich