Estimate on the amount of processes an EM Agent needs

Hi,
We would like to get a "ballpark" estimate on the amount of processes an EM Agent may need to acquire when metrics are enabled,jobs are running, people are using EM to monitor or diagnose a problem etc...
This is in response to a situation where one of the Application Teams had a problem with the EM Agent where once it was started, used up the host processes (approx 22), and basically grinded the system to a halt (the db parameter was also a problem it was set to 150 only..).
We therefore need to add a pre-host check to ensure that there are enough system resources available for the EM Agent to run.
Can anyone please confirm if there is an Oracle recommended ball park value or rule of thumb?
Thanks
Message was edited by:
user546767

I have not checked the estimates, but first of all, it is not a good idea to run Grid Control Repository in the same database with any other programme, development or application. It should be created in its own Database that is not shared
I believe the host process you mentioned are mostly for SYSMAN. You should always expect the Agent to have 2 connections to the database and SYSMAN/DBSNMP to open up to 20 connections before the Application Team connects.
Processes parameter settting of 150 is normally enough if the database is only used for Grid Control Repository. But if the Application team is also running there applications against that database, then you need to multiple the maximum number of connections for each team member by the number of team members and add it to the number above (e.g 22).
If I find any documented estimates, I will let you know.

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This data comes from 2 tables in OAB Application where it can be joined with a common ID.
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Unable to submit any sample records.:-(
Well, IF I had given the exact requirement, I would have got the solution by this Time!!! Your comments (and solutions) would definitely help me. Thank You
Message was edited by:
user559682

If i understand you correctly it can be possible with :
Connected to Oracle Database 10g Express Edition Release 10.2.0.1.0
Connected as hr
SQL>
SQL> drop table dates;
Table dropped
SQL> create table dates( "start" date, "end" date, "rate" number);
Table created
SQL> insert into dates values( to_date('01.01.2006', 'DD.MM.YYYY'), to_date('30.05.2006', 'DD.MM.YYYY'), 10);
1 row inserted
SQL> insert into dates values( to_date('01.06.2006', 'DD.MM.YYYY'), to_date('15.09.2006', 'DD.MM.YYYY'), 15);
1 row inserted
SQL> insert into dates values( to_date('16.09.2006', 'DD.MM.YYYY'), to_date('31.12.2006', 'DD.MM.YYYY'), 20);
1 row inserted
SQL> SELECT * FROM dates;
start       end               rate
01.01.2006 30.05.2006          10
01.06.2006 15.09.2006          15
16.09.2006 31.12.2006          20
SQL> SELECT t.i, d."rate"
2    FROM (SELECT add_months(to_date('01.01.2006', 'DD.MM.YYYY') /* start*/, LEVEL - 1) i
3            FROM dual
4          CONNECT BY LEVEL <= 12) t
5        ,dates d
6   WHERE t.i BETWEEN d."start" AND d."end";
I                 rate
01.01.2006          10
01.02.2006          10
01.03.2006          10
01.04.2006          10
01.05.2006          10
01.06.2006          15
01.07.2006          15
01.08.2006          15
01.09.2006          15
01.10.2006          20
01.11.2006          20
01.12.2006          20
12 rows selected
SQL> SELECT SUM(d."rate") rs
2    FROM (SELECT add_months(to_date('01.01.2006', 'DD.MM.YYYY') /* start*/, LEVEL - 1) i
3            FROM dual
4          CONNECT BY LEVEL <= 1 +
5                     extract(MONTH FROM to_date('10.10.2006', 'DD.MM.YYYY') /*death*/) -
6                     extract(MONTH FROM to_date('01.01.2006', 'DD.MM.YYYY') /* start*/)
7          ) t
8        ,dates d
9   WHERE t.i BETWEEN d."start" AND d."end";
        RS
       130
SQL>

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