Ora-00020 maximum no .of connections exceeded

Hi All,
I tried to connect the production Db is says Maximum number of connections exceeded.
How to overcome this situation.
I stoppped and bounced the Db.
The process paramter in pfile is 50
Is there any to overcome this

c:\sql>oerr ora 00020
00020, 00000, "maximum number of processes (%s) exceeded"
*Cause: All process state objects are in use.
*Action: Increase the value of the PROCESSES initialization parameter.
Increasing the PROCESSES parameter as suggested by the error information would remove the issue.
If the database has been working fine for an extending period of time without this error you should consider finding out what caused the increase so you can set parameter appropriately. Could be an increase in use or an application leaking connections.

Similar Messages

Java.lang.Exception: ORA-00020: maximum number of processes (150) exceeded?

When i run my web-application with the embedded OC4J server, the following error message is prompted:
java.lang.Exception: ORA-00020: maximum number of processes (150) exceeded
     void MyFolder.objects.MyObject.<init>(oracle.jbo.ApplicationModule, java.lang.String, java.lang.String, javax.servlet.http.HttpServletRequest)
     void MyFolder.servlet.MyServlet.doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     void javax.servlet.http.HttpServlet.service(com.evermind.server.http.EvermindHttpServletRequest, com.evermind.server.http.EvermindHttpServletResponse)
     void javax.servlet.http.HttpServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
     void com.evermind.server.http.ServletRequestDispatcher.invoke(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
     void com.evermind.server.http.ServletRequestDispatcher.forwardInternal(javax.servlet.ServletRequest, javax.servlet.http.HttpServletResponse)
     boolean com.evermind.server.http.HttpRequestHandler.processRequest(com.evermind.server.ApplicationServerThread, com.evermind.server.http.EvermindHttpServletRequest, com.evermind.server.http.EvermindHttpServletResponse, java.io.InputStream, java.io.OutputStream, boolean)
     void com.evermind.server.http.HttpRequestHandler.run(java.lang.Thread)
     void com.evermind.util.ThreadPoolThread.run()
Question:
- What is the cause of this error message? How to avoid?
- I intended to deploy my application to 9IAS server. Will the same problem occurs too?
Thanks for your reply!

Hi Pig,
When i run my web-application with the embedded OC4J server, the following error message is prompted:
java.lang.Exception: ORA-00020: maximum number of processes (150) exceeded
     void MyFolder.objects.MyObject.<init>(oracle.jbo.ApplicationModule, java.lang.String, java.lang.String, javax.servlet.http.HttpServletRequest)
     void MyFolder.servlet.MyServlet.doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     void javax.servlet.http.HttpServlet.service(com.evermind.server.http.EvermindHttpServletRequest, com.evermind.server.http.EvermindHttpServletResponse)
     void javax.servlet.http.HttpServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
     void com.evermind.server.http.ServletRequestDispatcher.invoke(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
     void com.evermind.server.http.ServletRequestDispatcher.forwardInternal(javax.servlet.ServletRequest, javax.servlet.http.HttpServletResponse)
     boolean com.evermind.server.http.HttpRequestHandler.processRequest(com.evermind.server.ApplicationServerThread, com.evermind.server.http.EvermindHttpServletRequest, com.evermind.server.http.EvermindHttpServletResponse, java.io.InputStream, java.io.OutputStream, boolean)
     void com.evermind.server.http.HttpRequestHandler.run(java.lang.Thread)
     void com.evermind.util.ThreadPoolThread.run()
Question:
- What is the cause of this error message? How to avoid?.
From the Oracle error message documentation:
ORA-00020 maximum number of processes (string) exceeded
Cause: All process state objects are in use.
Action: Increase the value of the PROCESSES initialization parameter.
Another alternative approach may be to configure your Connection pool and/or your ApplicationModule pool to optimize the use of
database connections and/or restrict the number of database connections used by the application. For example, if your application
has declared many root ApplicationModules (i.e. more than one ApplicationModule pool is in use) then it may help to enable the
jbo.doconnectionpooling switch so that each ApplicationModule instance in the pools does not maintain a dedicated database
connection while not in use. Another alternative if you are using the BC4J connection pool (not a JDBC datasource) may be to
restrict the number of connections the pool can create to < 150 with the jbo.maxpoolsize switch. However, please note that this
may have an impact on throughput.
- I intended to deploy my application to 9IAS server. Will the same problem occurs too?.
This is a database issue. So, yes.
Hope this helps.
JR

ASM issue ORA-00020: maximum number of processes (%s) exceeded (DBD ERROR)

Hi All,
i am running 10.2.0.3 with ASM (10.2.0.3) on SunOS (solaris 5.9)
+ASM1> ps -ef | grep pmon
oraunity 6174     1   0   Jan 01 ?         298:37 ora_pmon_UNITYQ1
oraunity 6480     1   0   Dec 31 ?          84:21 asm_pmon_+ASM1
oraunity 6085     1   0   Mar 09 ?         127:05 ora_pmon_UNIINFQ1
oraunity 11442     1   0   Jan 01 ?         253:54 ora_pmon_UNIDWHQ1One of rdbms instanace UNIINFQ1 got some failuer due to archival error 'ORA-00257:Archiver error:connect internal only:until freed.'
To drill down that, i tried to log in to +ASM1 instance to see space utilization under ARCH destination
SQL> show parameter db_name
NAME                                 TYPE        VALUE
db_name                              string      UNIINFQ1
log_archive_dest                     string      +UNITY_DG1/UNIINFQ1/archi tried following to log in to +ASM1
UNITYQ1> export ORACLE_SID=+ASM1
+ASM1> echo $ORACLE_SID
+ASM1
+ASM1> export ORACLE_HOME=/unity-rc001-q/ora01/app/oracle/product/10.2.0/asm10g
+ASM1> echo $ORACLE_HOME
/unity-rc001-q/ora01/app/oracle/product/10.2.0/asm10g
+ASM1> sqlplus / as sysdba
SQL*Plus: Release 10.2.0.3.0 - Production on Wed Jun 10 00:44:35 2009
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
Connected.
SQL> select * from v$instance;
select * from v$instance
ERROR at line 1:
ORA-01012: not logged onthen i did following
+ASM1> asmcmd
ORA-00020: maximum number of processes (%s) exceeded (DBD ERROR: OCISessionBegin)
[oraunity] mhs-clust5-qa:/unity-rc001-q/ora01/app/oracle/admin/UNIINFQ1/bdump:i have also noticed high number of BEQUETH connections to +ASM1 instance
+ASM1> ps -ef | grep +ASM1
oraunity 6486     1   0   Dec 31 ?         193:20 asm_lmon_+ASM1
oraunity 6533     1   0   Dec 31 ?          11:49 asm_ckpt_+ASM1
oraunity 6482     1   0   Dec 31 ?         108:29 asm_diag_+ASM1
oraunity 6527     1   0   Dec 31 ?           9:28 asm_mman_+ASM1
oraunity 6210     1   0   Mar 09 ?           8:03 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 6484     1   0   Dec 31 ?           7:40 asm_psp0_+ASM1
oraunity 6488     1   0   Dec 31 ?         221:17 asm_lmd0_+ASM1
oraunity 6480     1   0   Dec 31 ?          84:21 asm_pmon_+ASM1
oraunity 6529     1   0   Dec 31 ?           8:42 asm_dbw0_+ASM1
oraunity 6535     1   0   Dec 31 ?           6:45 asm_smon_+ASM1
oraunity 6523     1   0   Dec 31 ?         241:24 asm_lms0_+ASM1
oraunity 6531     1   0   Dec 31 ?           9:22 asm_lgwr_+ASM1
oraunity 6537     1   0   Dec 31 ?           9:03 asm_rbal_+ASM1
oraunity 6539     1   0   Dec 31 ?          14:36 asm_gmon_+ASM1
oraunity 6575     1   0   Dec 31 ?          45:59 asm_lck0_+ASM1
oraunity 6328     1   0   Jan 01 ?          15:08 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 7866     1   0 16:09:10 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 6941     1   0 16:24:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 11553     1   0   Jan 01 ?          42:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 5010     1   0 16:23:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 1171     1   0 16:21:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 26147     1   0 16:18:49 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 17948     1   0 16:14:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 16097     1   0 16:13:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 19867     1   0 16:15:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 14221     1   0 16:12:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 25640 4784   0 02:36:15 pts/4       0:00 grep +ASM1
oraunity 8513     1   0 16:09:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 23732     1   0 16:17:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 7864     1   0 16:09:09 ?           0:19 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 3109     1   0 16:22:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 27439     1   0 16:19:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 10400     1   0 16:10:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 5588     1   0 16:23:49 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 16667     1   0 16:13:48 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 21832     1   0 16:16:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 12308     1   0 16:11:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 29330     1   0 16:20:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oraunity 25581     1   0 16:18:30 ?           0:00 oracle+ASM1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))Can anyone help me to solve this issue without shutting down +ASM1. (this instance is used by rest 3 databases as well..so down time is not feasible)
Regards,
Bhavik Desai

You should check alert log file on database like Alex told you.
And please post Error ;)
But If You can access +ASM, Or ...by the way... if you stop database ... try to check ASM diskgroup.
$ export ORACLE_SID=+ASM1
$ sqlplus / as sysdba
SQL> set lines 130
SQL> set pages 10000
SQL> select NAME, TOTAL_MB, FREE_MB from v$asm_diskgroup;
If your DISKGROUPs for archivelog on DB full... backup or delete them
(please start database mount mode)
$ export ORACLE_SID=DB1
$ sqlplus / as sysdba
SQL> startup mount;
SQL> show parameter log_archive_dest
backup archivelog
$ rman target /
RMAN> backup ARCHIVELOG ALL DELETE INPUT format 'ARCH_%d_%U' ;
or delete
$ rman target /
RMAN> delete ARCHIVELOG ALL ;
After that ...
$ sqlplus / as sysdba
SQL> alter database open
This justs my suggestion, if your database has the problem with ASM diskgroup full ... because archvielog...
By the way... please post your result from ASM query and alert log file
Good Luck

ORA-00020: maximum number of processes 1000 exceeded

Hello,
Oracle 10.2.0.4.0
O/S: Windows Server 2003-64 bits
RAM: 32Gb
Instance: opext
show SGA
Total System Global Area 10284433408 bytes
Fixed Size 2180960 bytes
Variable Size 1574353056 bytes
Database Buffers 8690597888 bytes
Redo Buffers 17301504 bytes
Today at 8:01 am we've got this error:
ORA-00020: maximum number of processes 1000 exceeded
That incident was reported in a trace file (opext_ora_8240.trc):
Dump file c:\oracle\product\10.2.0\admin\opext\bdump\opext_ora_8240.trc
Tue Jul 31 08:01:03 2012
ORACLE V10.2.0.4.0 - 64bit Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
Windows NT Version V5.2 Service Pack 2
CPU : 8 - type 8664, 1 Physical Cores
Process Affinity : 0x0000000000000000
Memory (Avail/Total): Ph:18773M/32767M, Ph+PgF:66964M/80966M
Instance name: opext
Redo thread mounted by this instance: 1
Oracle process number: 0
Windows thread id: 8240, image: ORACLE.EXE
ORA-00020: maximum number of processes 1000 exceeded
Died during process startup with error 20 (seq=212441)
OPIRIP: Uncaught error 20. Error stack:
ORA-00020: maximum number of processes (1000) exceededThis was the first time in three years that happened an incident like this. Due my Windows server allows me to setup processes and sessions with a very high value, I did it when configuring this database for the first time.
select resource_name,initial_allocation, limit_value from V$RESOURCE_LIMIT;
RESOURCE_NAME     INITIAL_ALLOCATION     LIMIT_VALUE
processes     1000     1000
sessions     1105     1105
transactions     1215     UNLIMITEDI would like to know what application or process made that my database exceeds 1000 processes. I read that one possiblity is that there's a web app that open many connections to database and doesn't close them.
In my listener.log, I got this at 08:05 am:
31-JUL-2012 08:05:41 * service_update * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36578)) * establish * opext * 0
31-JUL-2012 08:05:47 * service_update * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36579)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36580)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36581)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36582)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36583)) * establish * opext * 0
31-JUL-2012 08:05:47 * (CONNECT_DATA=(SERVICE_NAME=opext)(CID=(PROGRAM=c:\windows\system32\inetsrv\w3wp.exe)(HOST=SRVXXX)(USER=NETWORK?SERVICE))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.1)(PORT=36584)) * establish * opext * 12518
TNS-12518: TNS:listener could not hand off client connection
TNS-12560: TNS:protocol adapter error
Host SRVXXX is a server where a web app is and 192.168.1.1 is our firewall. May I think that this server was the one that made so many connections?
I checked alert.log, trc file and listener.log. What else can I check to determine what was the cause of this incident?

user521219 wrote:
Host SRVXXX is a server where a web app is and 192.168.1.1 is our firewall. May I think that this server was the one that made so many connections?
I checked alert.log, trc file and listener.log. What else can I check to determine what was the cause of this incident?check IIS logs
It could result from Denial of Service attack or trojan or virus infecting webserver

ORA-00020: maximum number of processes (500) exceeded

Problem Details:
In our Database we are getting huge number of open connection from remote system.
Let say, our application A and remote application name is B.
Some common users of application A are USER0, USER1, USER2.
Remote Application B uses USER0 to create views on application A's table through Database Link.
Those views (nearly 100) are accessed in application B at several places from the Java code.
Since those views are getting called almost all the times from the application B's code, DB link is in use almost all the time - holding many number of connections (check the first row of the query output).
Many times the open connections remaining high and any other application, users trying to connect to application A,
getting the ORA-00020 error.
Note :
1. Application B is very old application and does not use open DB link or close DB link.
2. Application B tried with "alter session close Database link xxx", it decrease the number of open connection but its degrading the performance of application B at large scale.
3. To cope up with this problem Application A recently incraesed the parameter process=500, but not sure if this limit can also be broken through Application B
Questions/Doubts:
1) What is best approach to handle this problem??
'alter session close database link xxx' is the only option from application B's point ??
What other approach can be taken??
2) We are not sure the risk associated with increasing the process parameter value ??
Appreciate your suggestion !!
SQL>conn / as sysdba
SQL> select substr(username,1,8),
       substr(machine,1,11),
       substr(module,1,40),
       substr(osuser,1,7),
       status,
       count(1)
from v$session
group by username, machine, module, osuser, status;
USERNAME MACHINE     STATUS                        OSUSER     COUNT(1)
USER0    remotedb9      INACTIVE                              oracle        450
USER1    app_dev        INACTIVE                              beaadmin        1
USER0    svr01test      ACTIVE                                bdgp_dev        1
USER1    app_test       INACTIVE                              bbk09           2
USER0    app_dev        ACTIVE                                dj0494          1
USER1    app_test       INACTIVE                              pd0269          2
USER2    app_test       INACTIVE                              oracle         12
USER0    app_dev        ACTIVE                                oracle          2
USER2    app_test       INACTIVE                              www             8
USER2    dbr9db01       ACTIVE                                oracle          2
USER2    svr01dv        INACTIVE                              bdgp_dev        1
USER0    app_dev        INACTIVE                              scott           3
USER2    app_test       INACTIVE                              clerk           2
USER2    moose          ACTIVE                                john            2
USER2    titan.homer    INACTIVE                              voipdu          1
NEWUSER floradbdv1     INACTIVE                              oracle          8
SYS      app_test       ACTIVE                                oracle          1
20 rows selected.
SQL>conn USER0@csmip_st
Enter password:
ERROR:
ORA-00020: maximum number of processes (500) exceeded
Warning: You are no longer connected to ORACLE.

semmsl in Linux tells what the max number of processes are. You have to make sure this is equal to the process parameter of all instances plus 10.
It is usually in /etc/sysctl.conf
kernel.sem = 250 32000 100 128
SEMMSL
The SEMMSL kernel parameter is used to control the maximum number of semaphores per semaphore set.
Oracle recommends setting SEMMSL to the largest PROCESS instance parameter setting in the init.ora file for all databases hosted on the Linux system plus 10. Also, Oracle recommends setting the SEMMSL to a value of no less than 100.
SEMMNI
The SEMMNI kernel parameter is used to control the maximum number of semaphore sets on the entire Linux system.
Oracle recommends setting the SEMMNI to a value of no less than 100.
SEMMNS
The SEMMNS kernel parameter is used to control the maximum number of semaphores (not semaphore sets) on the entire Linux system.
Oracle recommends setting the SEMMNS to the sum of the PROCESSES instance parameter setting for each database on the system, adding the largest PROCESSES twice, and then finally adding 10 for each Oracle database on the system. To summarize:
SEMMNS = sum of PROCESSES setting for each database on the system
+ ( 2 * [largest PROCESSES setting])
+ (10 * [number of databases on system]
To determine the maximum number of semaphores that can be allocated on a Linux system, use the following calculation. It will be the lesser of:
SEMMNS -or- (SEMMSL * SEMMNI)
SEMOPM
The SEMOPM kernel parameter is used to control the number of semaphore operations that can be performed per semop system call.
The semop system call (function) provides the ability to do operations for multiple semaphores with one semop system call. A semaphore set can have the maximum number of SEMMSL semaphores per semaphore set and is therefore recommended to set SEMOPM equal to SEMMSL.
Oracle recommends setting the SEMOPM to a value of no less than 100.
App B could try using connection pooling or something to reduce the number of connections to the DB.

I am unable to connect database this error ORA-00020: maximum number of

i issuing this command / as sysdba .getting this error
Enter user-name: / as sysdba
ERROR:
ORA-00020: maximum number of processes (300) exceeded
how to resolve this problem.it is verry verry urgent.

Hi
"Maximum number of processes exceeded" will be alerted when your database has received a request for connection from a process which is beyond the number of processes your database can allow for.
Please check your database parameters
show parameters processes
Couple of options:
a) If your database has been running for a while and if it's the first time you are recieving this error, please check why all of a sudden more and more processes have been created. You may want to investigate your application, users, etc
b) If it's a valid request and if it's the case that you haven't really configured enough processes, you will have to increase the PROCESSES parameter in your init file and restart the database. It's not a dynamic parameter. Also, make sure you increase the sessions parameter as well along with the processes.
Before you do this, you will also have to check if your OS has been configured for increasing the number of processes. Think it's semmsl in Unix.

ORA-00020: maximum number of processes (25) exceeded ... uh?

Hello,
I'm trying to run a distributed simulation (13 programs x host,
16 hosts) that uses oracle (normally in an HP) against oracle on
linux.
I can't start all the programs, after about 20 clients (+-) no
other program will come up, and if i try to log to oracle with
sqlplus i get:
ERROR:
ORA-00020: maximum number of processes (25) exceeded
Is this a static limit imposed in the version oracle is
distributing for testing purposes?
Also, i notice that one server process is started for each client
program. So the distributed version doesn't support multithreaded
servers? Or may be i configured it wrong?
-cristian
null

Cristian Ferretti (guest) wrote:
: Oleg (guest) wrote:
: : : ORA-00020: maximum number of processes (25) exceeded
: : ------>Check PROCESSES= line in you init<SID>.ora file. After
: you
: : change it, you have to restart database.
: : : Also, i notice that one server process is started for each
: : client
: : : program.
: : -----> Check the following parameters in the same file:
: : mts_dispatchers, mts_max_dispatchers, mts_servers,
: : mts_max_servers, mts_multiple_listeners, mts_listener_address
: processes=400
: mts_dispatchers="tcp,16"
: mts_dispatchers="ipc,1"
: mts_max_dispatchers=32
: mts_servers=16
: mts_max_servers=32
: mts_service=oralinux
: sessions=384
: Copyed them from the hp oracle config.
: but:
: [oralinux@toaster dbs]$ svrmgrl
: Oracle Server Manager Release 3.0.5.0.0 - Production
: (c) Copyright 1997, Oracle Corporation. All Rights Reserved.
: Oracle8 Release 8.0.5.0.0 - Production
: PL/SQL Release 8.0.5.0.0 - Production
: SVRMGR> connect internal
: Connected.
: SVRMGR> startup
: ORA-00101: invalid specification for system parameter
: MTS_DISPATCHERS
: ORA-00102: network protocol
(ADDRESS=(PARTIAL=YES)(PROTOCOL=tcp))
: cannot be used by dispatchers
: SVRMGR>
Erase all MTS_%
parameters from your init.ora files and try only with
processes=xxx
null

ORA-00020: maximum number of processes (%s) exceeded

nobody was able to log into the database. when I tried 'sqlplus / as sysdba' I got : ORA-00020: maximum number of processes 1000 exceeded
database is 11.2.0.2 with patch 12
I've bounced the database and increased the processes..
my question is.. is there a way to tell what the processes were? what machine they were coming from? in a log somewhere..
Since I was unable to log in, I couldn't tell what had happened.. who was causing it..
if it happens again.. is there a way to log it?
also, this machine has DataGuard to a standby system.. is it possible for something to go wrong with dataguard and cause this?

>
my question is.. is there a way to tell what the processes were? what machine they were coming from? in a log somewhere..
Since I was unable to log in, I couldn't tell what had happened.. who was causing it..
if it happens again.. is there a way to log it?
also, this machine has DataGuard to a standby system.. is it possible for something to go wrong with dataguard and cause this?
>
You have only treated the symptom and not fixed the cause. As fellow members said, you could kill some "non-critical" processes and log in to the database.
But you will have to find out why there were so many processes in place. I am sure you might have set the definite number of processes after your planning before you went live. If you suddenly see too many processes, you will have to find out why and where they are coming from. Also check if there are any rogue processes.
To find out if there are any processes which have no sessions attached
select spid from v$process where addr not in (select paddr from v$session);
To answer your question, data guard shouldn't be affected by this. Nor would dataguard cause this issue in primary.
Fix this processes issue before it's too late. Otherwise, there will be a situation when you will have to keep increasing the processes until you hit the OS limit
Regards
Venkat

Db server doesn't start. Error message: ORA-00020: maximum number of proces

After I changed the parameter from archive log mode. My db server is having problems.
I can't log in as sys using sqlplus. when I log in through sqlplus /nolog, and tried to shut down, here is the error message:
$ sqlplus /nolog
SQL*Plus: Release 10.1.0.3.0 - Production on Mon Apr 23 11:43:07 2007
Copyright (c) 1982, 2004, Oracle. All rights reserved.
SQL> connect / as sysdba
Connected to an idle instance.
SQL> shutdown immediate
ORA-24324: service handle not initialized
ORA-24323: value not allowed
ORA-00020: maximum number of processes (%s) exceeded
SQL>
I am stuck on this. i have changed the value of processes in init.ora, but this error still exists. i think I need to do: create spfile from pfile='init.ora', but I need to log in to do, but I can't log in sys.
Please help.
Thanks.

i forgot shutdown abort. used that, created spfile from pfile, and it works ok now.

Maximum no of connections exceeded. Can not connect

We are getting this error: maximum no of connections exceeded. I tried to login from sqlplus as / sysdba but getting same error. What is the best way to login to Oracle and kill some sessions?
Oracle Version: 11g

I tried to login from sqlplus as / sysdba but getting same errorThen you are not logged onto OS as same user (oracle?) that owns Oracle software directory.
If Windows the post results from command below
SET
If some flavor Unix post results from command below
env | sort
Post Operating System (OS) name & version for DB server system.
Post results of
SELECT * from v$version
Edited by: sb92075 on Dec 1, 2009 10:31 AM

Cloning problem: ORA-00059: maximum number of DB_FILES exceeded

Hi everyone!
I'm trying to clone our data warehouse over an existing test instance, DMART01. Here's what I did:
1. on the data warehouse - alter database backup controlfile to trace;
2. edited the trace file to change the db name and path of the datafiles
3. logon to sqlplus in DMART01 and run my altered trace file.
4. Below is the error I'm getting:
SQL> @clone09142009.sql
ORACLE instance started.
Total System Global Area 1358954496 bytes
Fixed Size 2128280 bytes
Variable Size 1203668584 bytes
Database Buffers 150994944 bytes
Redo Buffers 2162688 bytes
CREATE CONTROLFILE REUSE SET DATABASE "DMART01" RESETLOGS NOARCHIVELOG
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-00059: maximum number of DB_FILES exceeded
ORA-01110: data file 211:
'/data/oracle/dmart01/d05/oracle/dmart01data/DW_PROD_MEDIUM11.dbf'
In my trace file it has
CREATE CONTROLFILE REUSE SET DATABASE "DMART01" RESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 2
MAXDATAFILES 500
MAXINSTANCES 1
MAXLOGHISTORY 1816
Additional information - the data warehouse has an entire tablespace with many datafiles that I don't want in DMART01. I edited those datafile lines out of my trace file. Could some remnants of that be causing my problems? The DB_FILES parameter in the warehouse is set to 500. In DMART01 it's only 200. In the clone, I only want to bring over 61 datafiles. Besides, I thought that in the create controlfile statement would set the parameter, in this case to 500.
I'm stumped. Any suggestions?
Thanks!
Sharon

I answered my own question. If anyone is curious, here's what I did:
in DMART01
1. startup nomount;
2. create pfile from spfile;
3. shutdown immediate;
4. edited pfile to have dw_files=500
5. startup nomount pfile=initDMART01.ora;
6. create spfile from pfile;
7. shutdown immediate;
8. @clone09142009.sql

ORA-01450: maximum key length (string) exceeded

CREATE TABLE ABC
(ADAPTERINSTID NUMBER(12),
MOTYPEID NUMBER(12),
GROUPDISCID VARCHAR(3000),
MEMBER_MOTYPEID NUMBER(12),
MEMBER_MOINSTID VARCHAR(3000),
primary key (
ADAPTERINSTID,
MOTYPEID,
GROUPDISCID,
MEMBER_MOTYPEID,
MEMBER_MOINSTID));
This is Oracle 11.2 and db_block_size is set to 8192 , Need help .
One way is use db_block_size like 16 K
thanks in advance,

From Show parameter nls_length_semantics
We come to know its --> nls_length_semantics CHAR
Will below solution works ?
ALTER SYSTEM SET NLS_LENGTH_SEMANTICS='BYTE' scope=both;
This I found at ORA-01450: maximum key length (6398) exceeded
thanks

ORA 01450 : maximum key length (1942) exceeded

hI all,
i got that message when try to create index.
ORA 01450 : maximum key length (1942) exceeded
Regards,

Maximum key length also depends on tablespace block size. It seems that your value (1942) may be for 2K blocks.
At least for my 10.2.0.1.0 on Windoze it takes
1478 for 2k tablespace
3118 for 4k tablespace
6398 for 8k tablespace
If you have 2K blocks I'd say it is somewhat rather small blocks, I'd normally use 8K blocks.
So if you have possibility (have at least version 9, probably 9.2 don't know exactly) to create tablespaces with non default blocksize then as a temporal solution you can create tablespace with larger blocksize and create index in it.
Of course so you have to allocate also some memory for these blocksizes and so divide your memory in possibly less utilized pieces.
See example for my 8k default blocksize test DB:
SQL> create table v (a varchar2(4000), b varchar2(4000), c varchar2(4000));
Table created.
SQL> insert into v values (lpad('a', 4000, 'a'), null, null);
1 row created.
SQL> create index vidx on v (a, b, c);
create index vidx on v (a, b, c)
ERROR at line 1:
ORA-01450: maximum key length (6398) exceeded
SQL> alter system set db_16k_cache_size = 10240;
System altered.
SQL> create tablespace big datafile 'big.dbf' size 10 m blocksize 16k;
Tablespace created.
SQL> create index vidx on v (a, b, c) tablespace big;
Index created.
Gints Plivna
http://www.gplivna.eu
Message was edited by:
gintsp
Of course inserting a row was completely unnecessary :)

ORA-Error: Maximum number of Processes exceeds

Hi,
Today we got one Oracle error: Maximum number of Processes exceeds while connects to our Oracle Database.
We have application running on our DB, which have 50 threads running and making connection to Oracle Schema.
In our init.ora file the Processes Parameter is set to 50.
But we also have another init<Schema Name>.ora file which has Processes Parameter as 50.
When I search on this error, I got that it is due to no. of user processes on Oracle instance.
What are these user processes exactly?
If we set the Processes Parameter as 150, and we have RAC environment with 3 Cluster, does it means we have 150*3 processes can run at a time.
The other doubt I have is that: Is this parameter is instance based, SID based or cluster based?
Please provide some input on this.
Thanks in Advance.
Manoj Macwan

If you don't issue
alter system set processes=150 scope=both sid='<your instance 1>'
all instances will be allowed to fork 150 processes.
The other poster is incorrect.
Sybrand Bakker
Senior Oracle DBA

ORA-00020 error, max connections reached

I tried logging into TOAD from back-end but it started giving error like 'ORA-00020, maximum no of connections exceeded...'. What, are the steps we can take to counter this.
I hope, my question is clear.
Please, help in solving the doubt.
regards

hi,
thanks, for your answer. But, in init.ora, the entries are like:-
# Processes and Sessions
#processes=250
processes=300
Is, there a difference from this in the maximum sessions possible which is given by 'sessions' parameter as
SQL> connect /as sysdba
SQL> show parameters sessions
When, I give :-
select count(1) from v$session
it gives 460.
Can, you please clear the doubts in the scenario put as above.
regards

Ora-00020 maximum no .of connections exceeded

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