Memory Guard Offlines Database Service Due to Low Free Memory

(Doc ID 1929994.1)

Last updated on MARCH 29, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Oracle Database - Standard Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Information in this document applies to any platform.

Symptoms

12c Grid Infrastructure, database service gets stopped and restarted after free memory is dropped below 500MB:

 

<ORACLE_BASE>/diag/crs/<node>/crs/trace/crsd.trc

2014-09-05 05:42:36.115933 :UiServer:896440064: {3:36501:2} Done for ctx=0x7fbdd00ac890
2014-09-05 05:42:36.710485 : AGFW:909047552: {3:36495:45901} Agfw Proxy Server received the message: RESOURCE_STOP[ora.orqa.orqa.svc 1 1] ID 4099:114787
2014-09-05 05:42:36.710618 : AGFW:909047552: {3:36495:45901} Agfw Proxy Server forwarding the message: RESOURCE_STOP[ora.orqa.orqa.svc 1 1] ID 4099:114787 to the agent /u01/app/crs/product/12.1.0/grid/bin/oraagent_oracle
....
2014-09-05 05:44:02.834510 : AGFW:909047552: {3:36495:47374} Agfw Proxy Server received the message: RESOURCE_START[ora.orqa.orqa.svc 1 1] ID 4098:118026
2014-09-05 05:44:02.834632 : AGFW:909047552: {3:36495:47374} Agfw Proxy Server forwarding the message: RESOURCE_START[ora.orqa.orqa.svc 1 1] ID 4098:118026 to the agent /u01/app/crs/product/12.1.0/grid/bin/oraagent_oracle

 

<GI_HOME>/oc4j/j2ee/home/log/dbwlm/logging/log.xml

<MSG_TEXT>Server racnode1 has violation risk level RED. New connection requests will no longer be accepted.</MSG_TEXT>

 

If Cloud Control is in use, the following event will also be logged:

Warning:<> - Server is under elevated memory pressure and services on all instances on this server will be stopped

 

Cause

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