性能庫 Oracle數據庫 鏈接不上問題的解決

今天性能庫的centos 上面的oracle18c 數據庫鏈接不上了 這裏進行了一次簡單處理

針對不一樣問題進行說明：

1. 實例時 blocked 的狀態 問題現象：

LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 18.0.0.0.0 - Production
Start Date                13-JUN-2019 21:13:25
Uptime                    0 days 1 hr. 10 min. 34 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/oracle/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/gscloudlinuxdb/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=gscloudlinuxdb)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "ora18c" has 1 instance(s).
  Instance "ora18c", status BLOCKED, has 1 handler(s) for this service...
The command completed successfully

解決辦法 使用靜態註冊。

方法

vim /u01/oracle/network/admin/listener.ora
# status 信息裏面有具體的位置。

# listener.ora Network Configuration File: /u01/oracle/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/oracle/)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = ora18c)
      (ORACLE_HOME = /u01/oracle)
      (SID_NAME = ora18c)
    )
  )

LISTENER1 =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = dengqiushuang)(PORT = 1521))
    )
  )

2. 解決監聽連接不上的問題 現象

[oracle@gscloudlinuxdb admin]$ sqlplus / as sysdba

SQL*Plus: Release 18.0.0.0.0 - Production on Thu Jun 13 22:31:27 2019
Version 18.3.0.0.0

Copyright (c) 1982, 2018, Oracle.  All rights reserved.

ERROR:
ORA-12547: TNS:lost contact

網上搜到不少方法：

參照：
https://blog.51cto.com/hbxztc/1945049

1、查看操做系統內核參數是否無誤  
[oracle@rhel7 database]$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 15738
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 2047
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
  
2、確認$ORACLE_HOME/bin/oracle文件權限是否有問題  
（在rac下須要查看$ORACLE_HOME/bin/oracle和$GRID_HOME/bin/oracle兩個文件），  
正確權限爲：  
[oracle@normal adump]$ ll $ORACLE_HOME/bin/oracle  
-rwsr-s--x 1 oracle oinstall 232399083 Aug 28 17:23 /u01/app/oracle/product/11.2.0/db_1/bin/oracle  
  
若是權限不對  
chmod 6751 $ORACLE_HOME/bin/oracle  
  
3、檢查一下環境變量  
echo $ORACLE_HOME  
echo $ORACLE_SID  
echo $LD_LIBRARY_PATH --注意：不一樣的操做系統此環境變量會不一樣  
echo $PATH  
  
4、檢查$ORACLE_HOME/bin/oracle 和 $ORACLE_HOME/rdbms/lib/config.o 的文件大小是否爲0，  
若是大小爲0，須要從新編譯oracle軟件：  
[oracle@normal backup]$ relink all  
writing relink log to: /u01/app/oracle/product/11.2.0/db_1/install/relink.log  
  
5、使用操做系統跟蹤命令跟蹤sqlplus鏈接過程，從而觀察跟蹤文件。 
ltrace -f -o /tmp/sqlplus.log sqlplus / as sysdba
或truss命令

我這邊很奇怪 我只是修改了一下 內核參數文件

vim /etc/security/limits.conf

我在最後面增長了這樣的數據

* soft nproc 20470
* hard nproc 16384
* soft nofile 10240
* hard nofile 65536
* soft stack 10240
* hard stack 10240

把 oracle 修改成 全部的用戶

重啓或者不重啓數據庫 而後就能夠了。

3. 結果爲：