SessMAx is exceeded then RAC fails

Question

My RAC cluster seems to have had the load on one node go through the roof and then eventually die.
This was the first message I received:
ORA-24418: Cannot open further sessions
Some syslog messages started coming in after this and then the node in the cluster failed. What would cause the ORA-24418 error?
Thank you.

Answer 1

jackiebaron wrote:
My RAC cluster seems to have had the load on one node go through the roof and then eventually die.
This was the first message I received:
ORA-24418: Cannot open further sessions
Some syslog messages started coming in after this and then the node in the cluster failed. What would cause the ORA-24418 error?
Thank you.Hello, you will have to do the follow steps:
Check the SGA parameters;+
Check the Sessions parameters;+
Check the version of your Oracle database;+
After that, you will analyze de changes for solve the problem. Follow bellow theses steps:
oradba> oerr ora 24418
24418, 00000, "Cannot open further sessions."
// *Cause:  Sufficient number of sessions are not present in the pool to
// execute the call. No new sessions can be opened as the
// sessMax parameter supplied in OCISessionPoolCreate has been
// reached.
// *Action: Call OCISessionPoolCreate in OCI_SPOOL_REINITIALIZE mode and
// increase the value of the sessMax parameter.
oradba@> sqlplus "/as sysdba"
SQL*Plus: Release 11.2.0.3.0 Production on Wed Feb 13 04:19:54 2013
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameters sga
NAME TYPE VALUE
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 45G
sga_target big integer 45G
SQL> show parameters sess
NAME TYPE VALUE
java_max_sessionspace_size integer 0
java_soft_sessionspace_limit integer 0
license_max_sessions integer 0
license_sessions_warning integer 0
session_cached_cursors integer 50
session_max_open_files integer 10
sessions integer 2726
shared_server_sessions integer
SQL> select from v$version;*
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
Best regards,
Bruno Reis.
www.brunors.com
Edited by: brunors on 13/02/2013 04:26
Edited by: brunors on 13/02/2013 04:26
Edited by: brunors on 13/02/2013 04:27