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Wednesday, January 26, 2011

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

Recently i upgraded 11gr2 to 11.2.0.2.0 patchset. after that when i trying to connect then go below error message.

ORA-20 "maximum number of processes (%s) exceeded"

Cause: An ORA-20 "maximum number of processes (%s) exceeded" occurs when the number of OS processes for the instance exceeds the PROCESSES parameter

and i am not able to connect to sys as sysdba user too. :(

C:\>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.2.0 Production on Wed Jan 26 08:58:09 2011

Copyright (c) 1982, 2010, Oracle. All rights reserved.

ERROR:
ORA-00020: maximum number of processes (150) exceeded


but there is a alternative which we can use to connect to sys as sysdba user.

C:\>sqlplus -prelim / as sysdba

SQL*Plus: Release 11.2.0.2.0 Production on Wed Jan 26 08:58:54 2011

Copyright (c) 1982, 2010, Oracle. All rights reserved.


Solution:
1. Increase the processes parameter Or
2. Kill KBCOOK process at OS level.

$ ps -ef | grep KBCOOK

oracle 17555 1 0 04:48 ? 00:00:00 ora_pmon_KBCOOK
oracle 17557 1 0 04:48 ? 00:00:00 ora_vktm_KBCOOK
oracle 17561 1 0 04:48 ? 00:00:00 ora_diag_KBCOOK
oracle 17563 1 0 04:48 ? 00:00:00 ora_dbrm_KBCOOK
oracle 17565 1 0 04:48 ? 00:00:00 ora_psp0_KBCOOK
oracle 17569 1 0 04:48 ? 00:00:00 ora_dia0_KBCOOK
oracle 17571 1 0 04:48 ? 00:00:00 ora_mman_KBCOOK
oracle 17573 1 0 04:48 ? 00:00:00 ora_dbw0_KBCOOK
oracle 17575 1 0 04:48 ? 00:00:00 ora_lgwr_KBCOOK
oracle 17577 1 0 04:48 ? 00:00:00 ora_ckpt_KBCOOK
oracle 17579 1 0 04:48 ? 00:00:00 ora_smon_KBCOOK
oracle 17581 1 0 04:48 ? 00:00:00 ora_reco_KBCOOK
oracle 17583 1 0 04:48 ? 00:00:00 ora_mmon_KBCOOK
oracle 17585 1 0 04:48 ? 00:00:00 ora_mmnl_KBCOOK
oracle 17587 1 0 04:48 ? 00:00:00 ora_d000_KBCOOK
oracle 17589 1 0 04:48 ? 00:00:00 ora_s000_KBCOOK
oracle 17608 1 0 04:48 ? 00:00:00 ora_smco_KBCOOK
oracle 17610 1 0 04:48 ? 00:00:00 ora_fbda_KBCOOK
oracle 17612 1 0 04:48 ? 00:00:00 ora_qmnc_KBCOOK
oracle 17641 1 0 04:48 ? 00:00:00 ora_q000_KBCOOK
oracle 17671 1 0 04:49 ? 00:00:00 ora_q001_KBCOOK
oracle 17761 1 0 04:50 ? 00:00:00 oracleKBCOOK (LOCAL=NO)
oracle 18480 1 0 04:58 ? 00:00:00 ora_w000_KBCOOK
oracle 18608 17126 0 05:00 pts/1 00:00:00 grep KBCOOK

$ kill -9 17761

$ ps -ef | grep KBCOOK

oracle 17555 1 0 04:48 ? 00:00:00 ora_pmon_KBCOOK
oracle 17557 1 0 04:48 ? 00:00:00 ora_vktm_KBCOOK
oracle 17561 1 0 04:48 ? 00:00:00 ora_diag_KBCOOK
oracle 17563 1 0 04:48 ? 00:00:00 ora_dbrm_KBCOOK
oracle 17565 1 0 04:48 ? 00:00:00 ora_psp0_KBCOOK
oracle 17569 1 0 04:48 ? 00:00:00 ora_dia0_KBCOOK
oracle 17571 1 0 04:48 ? 00:00:00 ora_mman_KBCOOK
oracle 17573 1 0 04:48 ? 00:00:00 ora_dbw0_KBCOOK
oracle 17575 1 0 04:48 ? 00:00:00 ora_lgwr_KBCOOK
oracle 17577 1 0 04:48 ? 00:00:00 ora_ckpt_KBCOOK
oracle 17579 1 0 04:48 ? 00:00:00 ora_smon_KBCOOK
oracle 17581 1 0 04:48 ? 00:00:00 ora_reco_KBCOOK
oracle 17583 1 0 04:48 ? 00:00:00 ora_mmon_KBCOOK
oracle 17585 1 0 04:48 ? 00:00:00 ora_mmnl_KBCOOK


Refer Metalink Note: [ID 825045.1] for more details.

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