Oracle查看和修改连接数(进程/会话/并发等等)

复制代码 代码如下:

select count(*) from v$process;

复制代码 代码如下:

elect count(*) from v$session;

复制代码 代码如下:

select count(*) from v$session where status='ACTIVE';

复制代码 代码如下:

select sid,serial#,username,program,machine,status from v$session;

复制代码 代码如下:

select value from v$parameter where name = 'processes';

复制代码 代码如下:

alter system set processes = 300 scope = spfile;

复制代码 代码如下:

SQL>shutdown immediate;
SQL>startup;

复制代码 代码如下:

SQL>select osuser,a.username,cpu_time/executions/1000000||'s',sql_fulltext,machine
SQL>from v$session a,v$sqlarea b
SQL>where a.sql_address = b.address
SQL>order by cpu_time/executions desc;

复制代码 代码如下:

su - oracle
SQL>sqlplus system/pwd as sysdba //进入sql
SQL>startup //启动数据库
SQL>lsnrctl start //启动监听
sqlplus "/as sysdba"
SQL>shutdown immediate; //关闭数据库
SQL>startup mount;
SQL>alter database open;