ORA-00020 Maximum Number Of Processes

Aug 23, 2012

select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE    11.2.0.2.0      Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - ProductionI got below error on the datases.

ORA-00020: maximum number of processesBased on the suggestion got from previous posts, I did kill some (LOCAL=NO) processes to get myself in. When I looked at the number of processes the number is 150, I changed it to 1000. After a day I got the same error.

ORA-00020: maximum number of processes (1000) exceededI killed processes again to let my self in, bases on the post below, I queried database

ORA-00020: maximum number of processes (%s) exceededHere is the query to find out if there are any processes with out session attached to it.

select spid from v$process where addr not in (select paddr from v$session);Result

SPID
null
35259840
36897866
13369762

[Code]...

To determine the from where greatest number of processes originated

SELECT MACHINE, COUNT(*) FROM V$SESSION GROUP BY MACHINE;Machine     Count(*)
     2
CAPITAL-D3F0092     1
DQAKDCDKLCSW01     14
desmond     20
DQAKDCDKLCSA01     52

My question is why I am keep getting this? Why do increasing process from 150 to 1000 did not resolve the issue?

What can I do to make sure that I don't get this error again?

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"Usually, when this happens, I want to get connected to the instance, so that I can try to figure out which user is causing the problem. One way to do that is to use the 'ps' command to identify some of the oldest server processes, and kill the 3-5 oldest processes, and then quickly try connecting to the database. Once you're in, you can look at things like V$SESSION to try and determine which user(s) is (are) consuming so many connections, and then go from there."

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