Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

How to find the maximum number of concurrent users that can be connected to a database at any point of time ?.

Posted on 2007-03-29
7
Medium Priority
?
3,057 Views
Last Modified: 2013-12-19
Hi all,

How to find the maximum number of concurrent users that can be connected to a database at any point of time ?.

1) Since, for dedicated servers, UGA is part of PGA and UGA is the only part of memory used by session logins, how to calculate what percentage of PGA could be allocated for UGA till PGA maxes out ?.

2) Also, in MTS servers, what part of Large Pool (or Shared Pool if Large Pool isn't configured) could be allocated for UGA ?.

3) Can Oracle allow concurrent connections till the value indicated by processes parameter ?.

Thanx

-RJ
0
Comment
Question by:vrrajeeb
5 Comments
 

Expert Comment

by:WPietruczuk
ID: 18821753
In the  initialization parameter file, you set the SESSIONS parameter to control this number of concurrent users. You should also consider changing your ENQUEUE_RESOURCES and TRANSACTION parameter values then.
0
 

Author Comment

by:vrrajeeb
ID: 18826137
What if the UGA isn't sufficient enough to accommodate the number of sessions specified by the SESSIONS/PROCESSES parameter ?.
0
 
LVL 3

Expert Comment

by:IanStuart
ID: 18897792
You don't really need to set the SESSION Parameter.
You just need to set the PROCESSES Parameter. Oracle sets the Sessions dynamically if not specified (Oracle does the following: Processes * 1.1 + 5)
0
 

Author Comment

by:vrrajeeb
ID: 19686072
My question is specifically with reference to the UGA memory and the concurrent sessions that Oracle can allocate at any point of time. Sessions/processes parameters just mention the upper ceiling in sessions. ie., Oracle won't allow any more sessions than the limits specified by SESSIONS/PROCESSES parameters. But that doens't mean Oracle WILL or CAN allow those many concurrent sessions either. That depends on the memory dynamically available at any given point in time. How to find that out is my question.
0
 
LVL 1

Accepted Solution

by:
Computer101 earned 0 total points
ID: 22243107
PAQed with no points refunded (of 50)

Computer101
EE Admin
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Using SQL Scripts we can save all the SQL queries as files that we use very frequently on our database later point of time. This is one of the feature present under SQL Workshop in Oracle Application Express.
From implementing a password expiration date, to datatype conversions and file export options, these are some useful settings I've found in Jasper Server.
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
This video shows how to recover a database from a user managed backup
Suggested Courses

564 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question