修改oracle的最大连接数问题

关于修改oracle的最大连接数问题

1. 修改最大连接数正常操作

sql>show parameter processes;
sql>show parameter sessions;
sql>show parameter spfile;

sql>alter system set processes=1000   scope=spfile;
sql>alter system set processes=1105   scope=spfile; 

shutdown immediate;
startup;

查看默认启动方式
SQL> select decode(count(*),1,'spfile','pfile') from v$spparameter where rownum=1 and isspecified ='TRUE';

2. 自己创建spfile

create pfile=''/opt/oracle/initmediadbtest.ora' from spfile; 

3. 出现内存不够用的情况

SQL> startup;
ORA-00371: not enough shared pool memory, should be atleast 838860800 bytes

4. 出现无法修改最大连接数情况的操作

当运行startup的时候，oracle会指定spfile,startup 启动次序 spfile优先于pfile。

默认启动方式出现value丢失的情况，估计是在哪个环节没有配置好。所以只能暂时指定某个修改好的特定文件来启动

vim /data/oracle/product/11.2/dbs/initORCL.ora
[oracle@localhost ~]$ grep -v "^#" /data/oracle/product/11.2/dbs/initORCL.ora
 
db_block_size=8192
db_cache_size=1048576000
open_cursors=300
db_domain=""
db_name=test
control_files=("/data/oracle/oradata/test/control01.ctl", "/data/oracle/oradata/test/control02.ctl")
compatible=11.2.0.0.0
diagnostic_dest=/data/oracle
java_pool_size=50331648
large_pool_size=160432128
 
shared_pool_size=838860800    #重点修改

processes=3000     #重点修改
sessions=3305    #重点修改
 
audit_file_dest=/data/oracle/admin/test/adump
audit_trail=db
remote_login_passwordfile=EXCLUSIVE
 
dispatchers="(PROTOCOL=TCP) (SERVICE=testXDB)"
 
pga_aggregate_target=11856248832
 
undo_tablespace=UNDOTBS1

开始重新启动

SQL> startup pfile='/data/oracle/product/11.2/dbs/initORCL.ora'
ORACLE instance started.

Total System Global Area 2121256960 bytes
Fixed Size		    2214976 bytes
Variable Size		 1056965568 bytes
Database Buffers	 1056964608 bytes
Redo Buffers		    5111808 bytes
Database mounted.
Database opened.
SQL> show parameter processes;

NAME				     TYPE	 VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes 		     integer	 0
db_writer_processes		     integer	 2
gcs_server_processes		     integer	 0
global_txn_processes		     integer	 1
job_queue_processes		     integer	 1000
log_archive_max_processes	     integer	 4
processes			     integer	 3000
SQL> show parameter sessions;

NAME				     TYPE	 VALUE
------------------------------------ ----------- ------------------------------
java_max_sessionspace_size	     integer	 0
java_soft_sessionspace_limit	     integer	 0
license_max_sessions		     integer	 0
license_sessions_warning	     integer	 0
sessions			     integer	 4528
shared_server_sessions		     integer