Re: BUG #5935: Log lotation not working for default log format

What would you expect the new log file to be named?  Your log_filename is s=
et to postgresql-%a.log.  The %a part expands to the current day of the wee=
k.  If it's Thursday and you already have a file for Thursday, what would t=
he new file name be?

        -- Korry

> The following bug has been logged online:
>=20
> Bug reference:      5935
> Logged by:          Brad Nicholson
> Email address:      bnicholson@hp.com
> PostgreSQL version: 9.0.3
> Operating system:   CentOS Release 5.5
> Description:        Log lotation not working for default log format
> Details:=20
>=20
> PostgreSQL 9.0.3 on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC)
> 4.1.2 20080704 (Red Hat 4.1.2-48), 64-bit
> CentOS release 5.5 (Final)
>=20
> (using the standard PG package)
>=20
> The logfile will not rotate if the log_filename is set to postgresql-%a.l=
og,
> which is the default setting after an initdb on my platform.
>=20
>=20
> I have tested this by setting log_rotation_size and exceeding that thresh=
old
> and manually trying to rotate the logs with SELECT pg_rotate_logfile().=
=20
> Both fail to rotate the log file.
>=20
>=20
> Manual Rotate:
>=20
> [postgres@pg1 pgdata]$ ls -al logs/
> total 24
> drwxr-xr-x 2 postgres postgres 4096 Mar 17 13:11 .
> drwxr-xr-x 4 postgres postgres 4096 Mar 17 13:08 ..
> -rw------- 1 postgres postgres  150 Mar 17 13:11 postgresql-Thu.log
> [postgres@pg1 pgdata]$ psql -p 6432  -c "show log_filename;" postgres
>   log_filename
> -------------------
> postgresql-%a.log
> (1 row)
>=20
> [postgres@pg1 pgdata]$ psql -p 6432 -c "SELECT pg_rotate_logfile()"
> postgres
> pg_rotate_logfile
> -------------------
> t
> (1 row)
>=20
> [postgres@pg1 pgdata]$ ls -al logs/
> total 24
> drwxr-xr-x 2 postgres postgres 4096 Mar 17 13:11 .
> drwxr-xr-x 4 postgres postgres 4096 Mar 17 13:08 ..
> -rw------- 1 postgres postgres  150 Mar 17 13:11 postgresql-Thu.log
>=20
>=20
>=20
> Size based automatic rotation:
>=20
> [postgres@pg1 pgdata]$ psql -p 6432  -c "show log_rotation_size;" postgres
> log_rotation_size
> -------------------
> 1MB
> (1 row)
>=20
> <generate some pgbench traffic with full statement logging>
>=20
> [postgres@pg1 pgdata]$ ls -thl logs/
> total 3.2M
> -rw------- 1 postgres postgres 3.2M Mar 17 13:24 postgresql-Thu.log
>=20
>=20
>=20
> If I switch the log_filename to something more specific like
> postgresql-%Y-%m-%d_%H_%M_%S.log - the logfile rotates.
>=20
> --=20
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