Using Serviceguard Extension for RAC, 10th Edition, April 2011

NOTE: Do not configure CLUSTER_INTERCONNECT_SUBNET in the RAC instance package if
the RAC-IC network is the same as CSS-HB network.
The following is an example of the relevant package configuration parameters:
Oracle RAC Instance Package
PACKAGE_NAME RAC_PACKAGE
PACKAGE_TYPE MULTI_NODE
LOCAL_LAN_FAILOVER_ALLOWED YES
NODE_FAIL_FAST_ENABLED NO
CLUSTER_INTERCONNECT_SUBNET 192.168.2.0
NOTE: For information on guidelines to change certain Oracle Clusterware and Serviceguard
cluster configuration parameters, see “Guidelines for Changing Cluster Parameters” (page 40)
Guidelines for Changing Cluster Parameters
This section describes the guidelines for changing the default values of certain Oracle clusterware
and Serviceguard cluster configuration parameters.
The guidelines vary depending on whether clustering interconnect subnet monitoring is used to
monitor the CSS HB subnet or not.
When Cluster Interconnect Subnet Monitoring is used
The Cluster Interconnect Subnet Monitoring feature is used to monitor the CSS-HB network.
If the Serviceguard cluster configuration parameter MEMBER_TIMEOUT is changed, then it is
necessary to also change the Oracle Clusterware parameter CSS miscount.
To change the CSS miscount, use the following guidelines:
The CSS miscount parameter should be greater than the following:
• For SLVM: (number of nodes – 1) times (F + SLVM timeout) + 15 seconds
• For CVM/CFS: (two * number of nodes – 1) times F + 15 seconds
• When both SLVM and CVM/CFS are used, then take the max of the above two calculations.
When Cluster Interconnect Subnet Monitoring is not Used
The Cluster Interconnect Monitoring is not used to monitor the CSS HB subnet.
If the Serviceguard cluster configuration parameter MEMBER_TIMEOUT is changed, then it is
necessary to also change the Oracle Clusterware parameter CSS miscount.
To change the CSS miscount, use the following guidelines:
The CSS miscount parameter should be greater than the following:
• For SLVM: F + SLVM timeout + 15 seconds
• For CVM/CFS: 3 times F + 15 seconds
• When both SLVM and CVM/CFS are used, then take the max of the above two calculations.
40 Serviceguard Configuration for Oracle 10g, 11gR1, or 11gR2 RAC