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Note: All the posts are based on practical approach avoiding lengthy theory. All have been tested on some development servers. Please don’t test any post on production servers until you are sure.

Monday, November 11, 2013

Clusterware resource ora.cvu

ora.cvu is a new resource introduced with Grid Infrastructure 11.2.0.2. The purpose of this resource is to invoke clusterware health checks at regular intervals. It is a singleton resource with cardinality of 1 and invokes the cluster verification utility. It executes the following command in the background.
cluvfy comp health -_format
Attribute '_format' sets the format which is redirected to the log file of the ora.cvu
Logs:
The logs related to ora.cvu are located under /log//cvu/.
There are two directories underneath: one for log file s(cvulog) and one for trace files (cvutrc).

Monitoring/Managing cvu:
-- status of the resource ora.cvu
C:\Users\inam>crsctl stat res ora.cvu -t
--------------------------------------------------------------------------------
NAME TARGET STATE SERVER STATE_DETAILS
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.cvu
1 ONLINE ONLINE or-11


-- Stopping cvu
C:\Users\inam>srvctl stop cvu
C:\Users\inam>srvctl status cvu
CVU is enabled but is not running

--Starting cvu
C:\Users\inam>srvctl start cvu
C:\Users\inam>srvctl status cvu
CVU is enabled and running on node or-11

-- enable/disable ora.cvu
C:\Users\inam>srvctl enable cvu
PRKO-2703 : CVU is already enabled

-- On Unix
$ crsctl stat res ora.cvu -p | grep ENABLED
ENABLED=1
C:\Users\inam>srvctl disable cvu

-- change execution frequency of ora.cvu
The frequency of ora.cvu execution can be changed by changing the value of the attribute "CHECK_INTERVAL"

C:\Users\inam>crsctl modify resource ora.cvu -attr CHECK_INTERVAL=21600
C:\Users\inam>crsctl stat res ora.cvu -p
NAME=ora.cvu
TYPE=ora.cvu.type
ACL=owner:nt authority\system:rwx,pgrp::r-x,other::r--
ACTION_FAILURE_TEMPLATE=
ACTION_SCRIPT=%CRS_HOME%\bin\cvures%CRS_SCRIPT_SUFFIX%
ACTIVE_PLACEMENT=1
AGENT_FILENAME=%CRS_HOME%\bin\scriptagent.exe
AUTO_START=restore
CARDINALITY=1
CHECK_INTERVAL=21600
CHECK_RESULTS=
CHECK_TIMEOUT=600
DEFAULT_TEMPLATE=
DEGREE=1
DESCRIPTION=Oracle CVU resource
ENABLED=0
FAILOVER_DELAY=0
FAILURE_INTERVAL=0
FAILURE_THRESHOLD=0
HOSTING_MEMBERS=
LOAD=1
LOGGING_LEVEL=1
NLS_LANG=
NOT_RESTARTING_TEMPLATE=
OFFLINE_CHECK_INTERVAL=0
PLACEMENT=balanced
PROFILE_CHANGE_TEMPLATE=
RESTART_ATTEMPTS=5
SCRIPT_TIMEOUT=600
SERVER_POOLS=*
START_DEPENDENCIES=hard(ora.net1.network)
START_TIMEOUT=0
STATE_CHANGE_TEMPLATE=
STOP_DEPENDENCIES=hard(ora.net1.network)
STOP_TIMEOUT=0
TYPE_VERSION=1.1
UPTIME_THRESHOLD=1h
USR_ORA_ENV=
VERSION=11.2.0.2.0

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