怎樣查看oracle當(dāng)前的連接數(shù)

1，查看當(dāng)前會(huì)話數(shù)

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SQL?conn?/?as?sysdba

已連接。

SQL?select?count(*)?from?v$session;

COUNT(*)

----------

45

注：session值=processes值*1.1+5

2,查看數(shù)據(jù)庫最大進(jìn)程數(shù)

SQL?show?parameter?processes

NAME???????????????????????????????TYPE????????VALUE

----------------------------------?-----------?------------

aq_tm_processes????????????????????integer?????0

db_writer_processes????????????????integer?????1

gcs_server_processes???????????????integer?????0

job_queue_processes????????????????integer?????10

log_archive_max_processes??????????integer?????2

processes??????????????????????????integer?????50

3，查看數(shù)據(jù)庫最大會(huì)話數(shù)

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

logmnr_max_persistent_sessions?????integer?????1

sessions???????????????????????????integer?????60

shared_server_sessions?????????????integer

4，修改processes和sessions值

SQL?alter?system?set?processes=300?scope=spfile;

系統(tǒng)已更改。

SQL?alter?system?set?sessions=300?scope=spfile;

系統(tǒng)已更改。

注：一般只執(zhí)行第一個(gè)命令就可以，session自動(dòng)更改

5，創(chuàng)建pfile

SQLcreate?pfile?from?spfile;

注：如果不做此步，可能會(huì)導(dǎo)致更改最大連接數(shù)之后數(shù)據(jù)庫不能啟動(dòng)現(xiàn)象

6，重啟數(shù)據(jù)庫，使更改生效

SQL?shutdown?immediate

SQL?startup

注：shutdown?normal正常關(guān)閉數(shù)據(jù)庫可能會(huì)相當(dāng)相當(dāng)?shù)穆?/p>

shutdown?abort?可能會(huì)導(dǎo)致啟動(dòng)數(shù)據(jù)庫時(shí)很慢。

7，查看進(jìn)程數(shù)，會(huì)話數(shù)，已經(jīng)修改過來了

SQL?show?parameter?processes

NAME?????????????????????????????????TYPE????????VALUE

------------------------------------?-----------?-----------

aq_tm_processes??????????????????????integer?????0

db_writer_processes??????????????????integer?????1

gcs_server_processes?????????????????integer?????0

job_queue_processes??????????????????integer?????10

log_archive_max_processes????????????integer?????2

processes????????????????????????????integer?????300

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

logmnr_max_persistent_sessions???????integer?????1

sessions?????????????????????????????integer?????335

shared_server_sessions???????????????integer

如何用sql語句查看Oracle當(dāng)前的所有會(huì)話

用sql語句查看oracle當(dāng)前連接數(shù) 怎樣查看oracle當(dāng)前的連接數(shù)呢？只需要用下面的SQL語句查詢一下就可以了。

select * from v$session where username is not null

select username,count(username) from v$session where username is not null group by username #查看不同用戶的連接數(shù)

select count(*) from v$session #連接數(shù)

Select count(*) from v$session where status='ACTIVE' #并發(fā)連接數(shù)

show parameter processes #最大連接

SQL show parameter process

NAME TYPE VALUE

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

aq_tm_processes integer 0

db_writer_processes integer 1

gcs_server_processes integer 0

job_queue_processes integer 10

log_archive_max_processes integer 2

processes integer 1500

alter system set processes = value scope = spfile;重啟數(shù)據(jù)庫 #修改連接

/home/oracle9i/app/oracle9i/dbs/init.ora

/home/oracle9i/app/oracle9i/dbs/spfilexxx.ora ## open_cursor

當(dāng) 前的連接數(shù)

select count(*) from v$process;

設(shè)置的最大連接數(shù)（默認(rèn)值 為150）

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

修改最大連接數(shù)

alter system set processes = 300 scope = spfile; 重新啟動(dòng)

當(dāng)數(shù)據(jù)庫最大連接數(shù)不夠時(shí)會(huì)出現(xiàn)客戶端連接間歇性失敗，報(bào)錯(cuò)ORA-12519

如何查看oracle當(dāng)前連接數(shù)，會(huì)話數(shù)

查看session：

select * from v$session where username is not null

select username,count(username) from v$session where username is not null group by username

當(dāng)前連接數(shù)：

select count(*) from v$process

查看連接數(shù)參數(shù)的設(shè)置情況

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

Select count(*) from v$session where status='ACTIVE'　#并發(fā)連接數(shù)

如何查看Oracle最大會(huì)話數(shù)

SQL select count(*) from v$session #當(dāng)前的連接數(shù) SQL Select count(*) from v$session where status='ACTIVE' #并發(fā)連接數(shù) SQL select value from v$parameter where name = 'processes' --數(shù)據(jù)庫允許的最大連接數(shù) SQL show parameter processes #最大連接 SQL select username,count(username) from v$session where username is not null group by username; #查看不同用戶的連接數(shù) 希望能幫到你

sqlserver和oracle 怎么查詢歷史最大會(huì)話數(shù)。。。

sqlserver不清楚。但是oracle的各種操作如下，請(qǐng)參考。

1.

Sql代碼

1.select?count(*)?from?v$process??

select?count(*)?from?v$process?--當(dāng)前的數(shù)據(jù)庫連接數(shù)

2.

Sql代碼

1.select?value?from?v$parameter?where?name?=?'processes'?

select?value?from?v$parameter?where?name?=?'processes'--數(shù)據(jù)庫允許的最大連接數(shù)

3.

Sql代碼

1.alter?system?set?processes?=?300?scope?=?spfile;?

alter?system?set?processes?=?300?scope?=?spfile;--修改最大連接數(shù):

4.

Sql代碼

1.shutdown?immediate;??

2.startup;?

shutdown?immediate;

startup;--重啟數(shù)據(jù)庫

怎樣獲取Oracle的連接數(shù)和活動(dòng)會(huì)話數(shù)

查看session：

select * from v$session where username is not null

select username,count(username) from v$session where username is not null group by username

當(dāng)前連接數(shù)：

select count(*) from v$process

查看連接數(shù)參數(shù)的設(shè)置情況

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

Select count(*) from v$session where status='ACTIVE'　#并發(fā)連接數(shù)