oracle 数据库 processes、sessions 的设置

迈不过友情╰ 2023-02-25 15:25 30阅读 0赞

os: centos 7.4  
db: oracle 11.2.0.4

# 版本 #

# cat /etc/centos-release
    CentOS Linux release 7.4.1708 (Core)

# su - oracle
    Last login: Mon Jul 13 14:42:54 CST 2020 on pts/0
    $ 
    $ 
    $ sqlplus / as sysdba;
    
    SQL*Plus: Release 11.2.0.4.0 Production on Mon Jul 13 14:50:33 2020
    
    Copyright (c) 1982, 2013, Oracle.  All rights reserved.
    
    
    Connected to:
    Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
    With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
    Data Mining and Real Application Testing options
    
    SQL> set lines 200;
    set pages 200;
    
    SQL> select * from v$version;
    
    BANNER
    --------------------------------------------------------------------------------
    Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
    PL/SQL Release 11.2.0.4.0 - Production
    CORE	11.2.0.4.0	Production
    TNS for Linux: Version 11.2.0.4.0 - Production
    NLSRTL Version 11.2.0.4.0 - Production

# processes、sessions #

当前的值

SQL> show parameter processes;
    processes			     integer			      1000
    
    SQL> show parameter sessions; 
    sessions			     integer			      1528

SQL> alter system set processes=600 scope=spfile;
    
    SQL> startup force;
    
    SQL> show parameter processes;
    processes			     integer			      600
    
    SQL> show parameter sessions;
    sessions			     integer			      928

sessions 值随着 sessions自动调整

sessions= processes \* 1.5 + 28

下面单独设置下 sessions

SQL> alter system set sessions = 1000 scope=spfile;
    
    SQL> startup force;
    
    SQL> show parameter processes;
    processes			     integer			      600
    
    SQL> show parameter sessions;
    sessions			     integer			      1000

可以看到 sessions单独设置1000后，显示为1000

所以日常运维中只需要设置 processes 参数即可。