[[email protected] data]# w

 19:59:47 up 122 days,  4:32,  4 users,  load average: 0.65, 0.71, 0.59

USER     TTY      FROM              [email protected]   IDLE   JCPU   PCPU WHAT

root     tty1     :0               17Jun16 122days  5:00   5:00  /usr/bin/Xorg :0 -nr -verbose -audit 4 -auth /var/run/gdm/auth-for-gdm-YoRXlJ/database -nolisten tcp vt1

root     pts/0    192.168.120.154  12:49    4:42m  0.04s  0.04s -bash

root     pts/1    192.168.120.154  12:49    0.00s  0.13s  0.05s w

root     pts/2    192.168.120.154  13:41    6:09m  0.06s  0.02s -bash

[[email protected] data]#

[[email protected] admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 17-OCT-2016 13:27:51

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.10.104)(PORT=1521)))

# 然後卡住了，卡住了，hang主了，沒有任何動彈，需要很久很久才能釋放出來。

# 再看下tnsping下服務，也比較慢，發現有錯誤問題出現，如下所示

[[email protected] admin]$ tnsping PD236

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 17-OCT-2016 13:21:24

Copyright (c) 1997, 2009, Oracle.  All rights reserved.

Used parameter files:

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.104)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = powerdes)))

TNS-12547: TNS:lost contact

[[email protected] admin]$

（1）進去lsnrctl管理命令列

[[email protected] oradata]$ lsnrctl

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 17-OCT-2016 20:36:34

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Welcome to LSNRCTL, type "help" for information.

LSNRCTL>

（2）檢視命令

LSNRCTL> show

The following operations are available after show

An asterisk (*) denotes a modifier or extended command:

rawmode                            displaymode                       

rules                              trc_file                          

trc_directory                      trc_level                         

log_file                           log_directory                     

log_status                         current_listener                  

inbound_connect_timeout            startup_waittime                  

snmp_visible                       save_config_on_stop               

dynamic_registration               enable_global_dynamic_endpoint    

oracle_home                        pid                               

（3）檢視跟蹤檔案已經檔案目錄

LSNRCTL> show trc_file

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.10.104)(PORT=1521)))

LISTENER parameter "trc_file" set to ora_2994_139957275965184.trc

The command completed successfully

LSNRCTL>

LSNRCTL> show trc_directory

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.10.104)(PORT=1521)))

LISTENER parameter "trc_directory" set to /oracle/app/oracle/diag/tnslsnr/pldb236/listener/trace

The command completed successfully

LSNRCTL>

[[email protected] ~]# tail -f /oracle/app/oracle/diag/tnslsnr/pldb236/listener/trace/ora_2994_139957275965184.trc

2016-10-17 13:42:38.443831 : nsbrfr:nsbfs at 0x25d94c0, data at 0x25aa940.

2016-10-17 13:42:38.443843 : nsbrfr:nsbfs at 0x256f3b0, data at 0x2576610.

2016-10-17 13:42:38.443855 : nsbrfr:nsbfs at 0x25a4ac0, data at 0x25af850.

2016-10-17 13:42:38.443867 : nsbrfr:nsbfs at 0x25a4b70, data at 0x25b52c0.

2016-10-17 13:42:38.443880 : nsbrfr:nsbfs at 0x25b1fb0, data at 0x25b8a10.

2016-10-17 13:42:38.443891 : nsbrfr:nsbfs at 0x2568f10, data at 0x2566670.

2016-10-17 13:42:38.443903 : nsbrfr:nsbfs at 0x256afe0, data at 0x256b090.

2016-10-17 13:42:38.443916 : nsbrfr:nsbfs at 0x250fd00, data at 0x2568fc0.

2016-10-17 13:42:38.443937 : nlse_term_audit:entry

2016-10-17 13:42:38.443951 : nlse_term_audit:exit

# stop很慢，卡住了，至少需要50秒才能完成

LSNRCTL> stop

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.10.104)(PORT=1521)))

……卡呀卡……卡到外婆家

The command completed successfully

LSNRCTL> start   # start會快一些，快到10秒到20秒就完成了。

Starting /oracle/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.1.0 - Production

System parameter file is /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Log messages written to /oracle/app/oracle/diag/tnslsnr/pldb236/listener/alert/log.xml

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.10.10.104)(PORT=1521)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.10.104)(PORT=1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production

Start Date                17-OCT-2016 20:46:58

Uptime                    0 days 0 hr. 0 min. 0 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /oracle/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

Listener Log File         /oracle/app/oracle/diag/tnslsnr/pldb236/listener/alert/log.xml

Listening Endpoints Summary...

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.10.10.104)(PORT=1521)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))

Services Summary...

Service "powerdes" has 1 instance(s).

  Instance "powerdes", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

LSNRCTL>

PS：重啟之後，遠端連線oracle例項還是非常慢的，所以重啟也沒有啥效果

LSNRCTL> trace 16

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.10.104)(PORT=1521)))

Opened trace file: /oracle/app/oracle/diag/tnslsnr/pldb236/listener/trace/ora_14662_140432957417216.trc

The command completed successfully

LSNRCTL>

PS：然後去檢視這個日誌，也沒有發現異常資訊，看來此途徑無效了。

SQL> ALTER SYSTEM SET EVENT = '28401 TRACE NAME CONTEXT FOREVER, LEVEL 1' SCOPE = SPFILE;

System altered.

SQL> create pfile from spfile;

File created.

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area 6680915968 bytes

Fixed Size              2213936 bytes

Variable Size              4898949072 bytes

Database Buffers    1744830464 bytes

Redo Buffers                34922496 bytes

Database mounted.

Database opened.

SQL>