Recycle Listener Logs Online

The listener logs including SCAN listeners are growing very fast and big. So we need purge them periodically. We can stop listener, rename/delete/zip the listener logs, but it is not a good practice to stop listener at any time, because it will impact the business.

Here is a simple way to purge listener logs online:

$ lsnrctl
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 21-SEP-2016 10:17:10
Copyright (c) 1991, 2014, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.

LSNRCTL> set
The following operations are available after set
An asterisk (*) denotes a modifier or extended command:
rawmode displaymode
trc_file trc_directory
trc_level log_file
log_directory log_status
current_listener inbound_connect_timeout
startup_waittime save_config_on_stop
dynamic_registration enable_global_dynamic_endpoint
connection_rate_limit valid_node_checking_registration
registration_invited_nodes registration_excluded_nodes

LSNRCTL> set current_listener listener
Current Listener is listener

LSNRCTL> show log_status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
listener parameter "log_status" set to ON
The command completed successfully

LSNRCTL> set log_status off
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
listener parameter "log_status" set to OFF
The command completed successfully
LSNRCTL> exit


$ cd /u01/app/grid/diag/tnslsnr/racnode1/listener/trace
$ ls -ltr
total 223388
...
..
.
-rw-r----- 1 grid oinstall 146333508 Sep 21 10:17 listener.log
...
..
.
$cp listener.log listener_old.log
$cat /dev/null > listener.log

$ lsnrctl
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 21-SEP-2016 10:17:52
Copyright (c) 1991, 2014, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.

LSNRCTL> set current_listener listener
Current Listener is listener
LSNRCTL> show log_status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
listener parameter "log_status" set to OFF
The command completed successfully


LSNRCTL> set log_status on
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
listener parameter "log_status" set to ON
The command completed successfully
LSNRCTL> exit


$ ls -ltr
total 224816
...
..
.
-rw-r----- 1 grid oinstall 146333508 Sep 21 10:17 listener_old.log
-rw-r----- 1 grid oinstall 2834 Sep 21 10:18 listener.log
...
..
.