Обсуждение: Log Rotation
Hello team I hope everything going well for you guys!
I have a question about log rotation.
I set the parameters as a daily. The set parameters are as follows.
In this case, the log file is created as "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs in the 12th day file need to be truncated.
Is the expected result correct? Or does PostgreSQL not support deleting, truncating files? I got successful results when I did this process hourly. However, I could not get a correct result when I tried it daily log truncate.
The parameter for I used as Hour log; postgresql-%H%M
log_destination = 'stderr'
logging_collector = on
log_directory = '/var/log/postgresql/logtest'
log_filename = 'postgresqllogtest-%Y-%m-%d_%H%M%S.log'
log_rotation_age=1440
log_min_duration_statement = 5000
log_line_prefix = 'time=%t [%p]: db=%d,user=%u,app=%a,client=%h '
log_statement = 'none'
log_temp_files = 0
log_timezone = 'Europe/Istanbul'
log_hostname = on
log_min_messages = warning
log_min_error_statement = error
log_lock_waits = on
I have a question about log rotation.
I set the parameters as a daily. The set parameters are as follows.
In this case, the log file is created as "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs in the 12th day file need to be truncated.
Is the expected result correct? Or does PostgreSQL not support deleting, truncating files? I got successful results when I did this process hourly. However, I could not get a correct result when I tried it daily log truncate.
The parameter for I used as Hour log; postgresql-%H%M
log_destination = 'stderr'
logging_collector = on
log_directory = '/var/log/postgresql/logtest'
log_filename = 'postgresqllogtest-%Y-%m-%d_%H%M%S.log'
log_rotation_age=1440
log_min_duration_statement = 5000
log_line_prefix = 'time=%t [%p]: db=%d,user=%u,app=%a,client=%h '
log_statement = 'none'
log_temp_files = 0
log_timezone = 'Europe/Istanbul'
log_hostname = on
log_min_messages = warning
log_min_error_statement = error
log_lock_waits = on
SOzcn <selahattinozcnma@gmail.com> writes:
> I set the parameters as a daily. The set parameters are as follows.
> In this case, the log file is created as
> "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs
> in the 12th day file need to be truncated.
> Is the expected result correct? Or does PostgreSQL not support deleting,
> truncating files? I got successful results when I did this process hourly.
> However, I could not get a correct result when I tried it daily log
> truncate.
If you want log rotation, you need to choose your filename pattern
so that old log files will be overwritten after a while; or else
set up some external tool for removing the old ones. Postgres does
not do anything to keep track of old log files.
regards, tom lane
Hello Tom,
Thanks for the response.
On the top you can see the parameters, I already set the parameters as you said. But the truncate didn't work for daily.
Thanks for the response.
On the top you can see the parameters, I already set the parameters as you said. But the truncate didn't work for daily.
Tom Lane <tgl@sss.pgh.pa.us>, 12 Ara 2023 Sal, 19:18 tarihinde şunu yazdı:
SOzcn <selahattinozcnma@gmail.com> writes:
> I set the parameters as a daily. The set parameters are as follows.
> In this case, the log file is created as
> "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs
> in the 12th day file need to be truncated.
> Is the expected result correct? Or does PostgreSQL not support deleting,
> truncating files? I got successful results when I did this process hourly.
> However, I could not get a correct result when I tried it daily log
> truncate.
If you want log rotation, you need to choose your filename pattern
so that old log files will be overwritten after a while; or else
set up some external tool for removing the old ones. Postgres does
not do anything to keep track of old log files.
regards, tom lane
On Tue, Dec 12, 2023 at 11:11 AM SOzcn <selahattinozcnma@gmail.com> wrote:
Hello team I hope everything going well for you guys!
I have a question about log rotation.
I set the parameters as a daily. The set parameters are as follows.
In this case, the log file is created as "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs in the 12th day file need to be truncated.
Is the expected result correct? Or does PostgreSQL not support deleting, truncating files? I got successful results when I did this process hourly. However, I could not get a correct result when I tried it daily log truncate.
The parameter for I used as Hour log; postgresql-%H%M
log_destination = 'stderr'
logging_collector = on
log_directory = '/var/log/postgresql/logtest'
log_filename = 'postgresqllogtest-%Y-%m-%d_%H%M%S.log'
%M%S really isn't needed.
log_rotation_age=1440
(Setting that to "1d" is clearer IMO than 1440 minutes.)
It _says_ "rotation", but _means_ "overwrite".
If you want to _delete_ files older than 12 days, you must have an external process do it: logrotate, or your own shell script that uses find(1).
Thanks for the response Ron!
Have a great week!
Have a great week!
Ron Johnson <ronljohnsonjr@gmail.com>, 12 Ara 2023 Sal, 19:48 tarihinde şunu yazdı:
On Tue, Dec 12, 2023 at 11:11 AM SOzcn <selahattinozcnma@gmail.com> wrote:Hello team I hope everything going well for you guys!
I have a question about log rotation.
I set the parameters as a daily. The set parameters are as follows.
In this case, the log file is created as "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs in the 12th day file need to be truncated.
Is the expected result correct? Or does PostgreSQL not support deleting, truncating files? I got successful results when I did this process hourly. However, I could not get a correct result when I tried it daily log truncate.
The parameter for I used as Hour log; postgresql-%H%M
log_destination = 'stderr'
logging_collector = on
log_directory = '/var/log/postgresql/logtest'
log_filename = 'postgresqllogtest-%Y-%m-%d_%H%M%S.log'%M%S really isn't needed.log_rotation_age=1440(Setting that to "1d" is clearer IMO than 1440 minutes.)It _says_ "rotation", but _means_ "overwrite".If you want to _delete_ files older than 12 days, you must have an external process do it: logrotate, or your own shell script that uses find(1).
On Tue, 2023-12-12 at 19:25 +0300, SOzcn wrote: > On the top you can see the parameters, I already set the parameters as > you said. But the truncate didn't work for daily. Again: PostgreSQL will only truncate a file if, during log rotation, it starts writing to a file that already exists. It does not take care about old, closed log files. Yours, Laurenz Albe
Hi,
You can set "log_truncate_on_rotation" to "on" to truncate the log files if the log file name is same on rotation. Thanks,
Sagar
On Tue, Dec 12, 2023 at 9:41 PM SOzcn <selahattinozcnma@gmail.com> wrote:
Hello team I hope everything going well for you guys!
I have a question about log rotation.
I set the parameters as a daily. The set parameters are as follows.
In this case, the log file is created as "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs in the 12th day file need to be truncated.
Is the expected result correct? Or does PostgreSQL not support deleting, truncating files? I got successful results when I did this process hourly. However, I could not get a correct result when I tried it daily log truncate.
The parameter for I used as Hour log; postgresql-%H%M
log_destination = 'stderr'
logging_collector = on
log_directory = '/var/log/postgresql/logtest'
log_filename = 'postgresqllogtest-%Y-%m-%d_%H%M%S.log'
log_rotation_age=1440
log_min_duration_statement = 5000
log_line_prefix = 'time=%t [%p]: db=%d,user=%u,app=%a,client=%h '
log_statement = 'none'
log_temp_files = 0
log_timezone = 'Europe/Istanbul'
log_hostname = on
log_min_messages = warning
log_min_error_statement = error
log_lock_waits = on
Thanks for the response guys, yeah that works with the specific log file.
Have a nice day!
Have a nice day!
sagar jadhav <sagarjdhv5@gmail.com>, 13 Ara 2023 Çar, 05:13 tarihinde şunu yazdı:
Hi,You can set "log_truncate_on_rotation" to "on" to truncate the log files if the log file name is same on rotation.Thanks,SagarOn Tue, Dec 12, 2023 at 9:41 PM SOzcn <selahattinozcnma@gmail.com> wrote:Hello team I hope everything going well for you guys!
I have a question about log rotation.
I set the parameters as a daily. The set parameters are as follows.
In this case, the log file is created as "postgresqllogtest-2023-12-12_182351.log" after the 13th day file, the logs in the 12th day file need to be truncated.
Is the expected result correct? Or does PostgreSQL not support deleting, truncating files? I got successful results when I did this process hourly. However, I could not get a correct result when I tried it daily log truncate.
The parameter for I used as Hour log; postgresql-%H%M
log_destination = 'stderr'
logging_collector = on
log_directory = '/var/log/postgresql/logtest'
log_filename = 'postgresqllogtest-%Y-%m-%d_%H%M%S.log'
log_rotation_age=1440
log_min_duration_statement = 5000
log_line_prefix = 'time=%t [%p]: db=%d,user=%u,app=%a,client=%h '
log_statement = 'none'
log_temp_files = 0
log_timezone = 'Europe/Istanbul'
log_hostname = on
log_min_messages = warning
log_min_error_statement = error
log_lock_waits = on