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high this change also applies to existing evaluations that include this rule for more information see corosync configuration parameter values in the sap hana high availability planning guide high october 27 2025 sap high availability corosync use the recommended value for the max_messages parameter in a linux pacemaker high availability cluster for sap on google cloud to avoid message flooding between cluster nodes during token processing set the corosync max_messages parameter to a value of 20 from october 27th 2025 the severity of this evaluation rule has been updated from caution to medium this change also applies to existing evaluations that include this rule for more information see corosync configuration parameter values in the sap hana high availability planning guide medium october 27 2025 sap high availability corosync use the recommended value for the token_retransmits_before_loss_const parameter in a linux pacemaker high availability cluster for sap on google cloud set the corosync token_retransmits_before_loss_const parameter to a value of 10 or more to conform to google cloud best practices for more information see corosync configuration parameter values in the sap hana high availability planning guide critical april 14 2025 sap high availability corosync use the recommended value for the token parameter in a linux pacemaker high availability cluster for sap on google cloud set the value of the corosync token parameter to the recommended timeout value of 20000 to conform to the google cloud best practice for failure detection for more information see corosync configuration parameter values in the sap hana high availability planning guide critical april 14 2025 sap high availability corosync use the recommended value for the transport parameter in a linux pacemaker high availability cluster for sap on google cloud set the value of the corosync transport protocol as appropriate for your operating system for red hat systems of version 8 and later the parameter should be set to knet for other supported operating systems a value of udpu is expected for more information see the guide for your os for rhel see ha cluster configuration guide for sap hana on rhel for sles see ha cluster configuration guide for sap hana on sles critical april 14 2025 sap high availability pacemaker set pcmk_delay_max on the fencing device cluster resource to avoid fence race conditions in linux pacemaker high availability clusters for sap the pcmk_delay_max parameter must be specified with a value of 30 or greater in the definition of the fencing resource for more information see special options for fencing resources critical april 14 2025 sap high availability pacemaker use the recommended timeout value for saphana operations the definition of the saphana resource in a linux pacemaker ha cluster contains a timeout value for the stop start promote and demote operations for linux pacemaker ha clusters for sap on google cloud we recommend a value of at least 3600 for each operation for more information see the guide for your os for rhel see ha cluster configuration guide for sap hana on rhel for sles see ha cluster configuration guide for sap hana on sles critical april 14 2025 sap hana insights sap hana maintenance check the log mode if log_mode is set to normal hana creates regular log backups allowing for point in time recovery restoring up to the moment before a failure if log_mode is set to overwrite no log backups are created you can only recover the database to the last data backup from october 27th 2025 the severity of this evaluation rule has been updated from medium to critical this change also applies to existing evaluations that include this rule for more information see log modes in the sap hana administration guide critical october 27 2025 sap hana insights sap hana high availability and disaster recovery set logshipping_async_buffer_size on the primary site if system replication is disconnected during a full data shipment then replication has to start from scratch in order to reduce the risk of buffer full situations the logshipping_async_buffer_size parameter can be adjusted to a value of 1 gb on the primary site from october 27th 2025 the severity of this evaluation rule has been updated from medium to high this change also applies to existing evaluations that include this rule for more information see sap hana system replication in the sap knowledge base high october 27 2025 sap hana insights sap hana high availability and disaster recovery use the recommended value for the logshipping_max_retention_size parameter in context of logreplay operations modes the logshipping_max_retention_size sap hana parameter defines the maximum amount of redo logs that are kept on primary site for synchronization with the secondary site default 1 tb if the underlying file system isn t large enough to hold the complete configured retention size it can happen in the worst case that the file system runs full and the primary site comes to a standstill for more information see sap hana system replication in the sap knowledge base medium april 17 2025 sap hana insights sap hana performance check for appropriate configuration of the max_cpuload_for_parallel_merge parameter by default multiple auto merges up to num_merge_threads of different tables or partitions can be executed up to a cpu utilization limit of 45 but as soon as this limit is exceeded a maximum of one auto merge is executed at any time this can in the worst case result in an increased auto merge backlog although sufficient system resources for handling parallel auto merges would still be available in this case you can consider increasing this parameter to a value that is both higher than the usual cpu utilization and lower than a critical limit that would allow auto merges to introduce resource bottlenecks from october 27th 2025 the severity of this evaluation rule has been updated from medium to high this change also applies to existing evaluations that include this rule for more information see sap hana delta merges in the sap knowledge base high october 27 2025 sap hana insights sap hana scaleout check to see that all hosts in a scale out environment have a consistent os version and kernel version in a scale out sap hana environment maintaining consistency in os and kernel across all nodes within the system is crucial for optimal performance and stability from october 27th 2025 the severity of this evaluation rule has been updated from medium to critical this change also applies to existing evaluations that include this rule for more information see sap hana supported operating systems in the sap knowledge base critical october 27 2025 sap high availability pacemaker check that an alias ip implementation is not in use in a linux pacemaker high availability cluster for sap on google cloud using alias ip addresses that move between compute engine instances is discouraged as a failover mechanism because it doesn t meet the high availability requirements in certain failure scenarios such as a zonal failure event you might not be able to remove an alias ip address from a compute instance consequently you might not be able to move the alias ip address to another compute instance making failover impossible for more information see alias ip vip implementations in the sap hana high availability planning guide critical april 14 2025 sap high availability pacemaker ensure that all cluster resources are healthy to ensure high availability for your sap system and to safeguard it from unforeseen host events all resources in the pacemaker managed cluster must be in the started state for more information see resource agent is stopped in the troubleshooting high availability configurations for sap guide critical june 12 2025 sap high availability pacemaker use the recommended settings for cluster op default timeout in a pacemaker cluster the timeout parameter in op_defaults sets a global default for how long operations can take before being considered failed if a specific timeout is configured for an individual resource it will override the global default google cloud recommends to set a default timeout value of 600 from october 27th 2025 the severity of this evaluation rule has been updated from medium to high this change also applies to existing evaluations that include this rule for more information see the guide for your os for rhel see set the cluster defaults for sles see cluster bootstrap and more high october 27 2025 sap high availability pacemaker use the recommended cluster properties for the ascs resource in a linux pacemaker high availability cluster for sap on google cloud meta_attributes are configuration parameters that influence how a resource behaves within the cluster for the ascs resource suse and red hat recommend to set resource stickiness to a value of 5000 also for ensa1 set migration threshold to a value of 1 and failure timeout to a value of 60 from october 27th 2025 the severity of this evaluation rule has been updated from medium to critical this change also applies to existing evaluations that include this rule for more information see the guide for your os for rhel see creating resource for managing the a scs instance for sles ensa1 see configuring the resources for the ascs for sles ensa2 see configuring the resources for the ascs critical october 27 2025 sap high availability pacemaker use the recommended ers resource setting for ensa1 in a high availability sap central services cluster abap or java setting is_ers true for the ers resource is mandatory for an enqueue replication server ensa1 configuration because it is used to identify the node where the ers service is active for an ensa2 configuration this setting is optional but recommended for more information see the following guides for rhel see creating resource for managing the ers instance or view the red hat knowledgebase for sles see configuring cluster resources for sap netweaver enqueue replication 1 high availability cluster sap netweaver 7 40 and 7 50 see configuring the resources for the ers for sap s 4 hana enqueue replication 2 high availability cluster see configuring the resources for the ers instance critical april 15 2025 sap high availability pacemaker use the recommended resource defaults for the sap cs cluster in a linux pacemaker high availability cluster to help manage resource behavior and failover policies the rsc_defaults primitive sets default meta_attributes for all resources suse and red hat recommend to set resource stickiness to a value of 1 indicating a low preference for resources to remain on their current node and a migration threshold to a value of 3 allowing up to three failures on a node before a resource is moved to another node from october 27th 2025 the severity of this evaluation rule has been updated from medium to high this change also applies to existing evaluations that include this rule for more information see the guide for your os for rhel 9 see configuring general cluster properties for rhel 8 see configuring general cluster properties for sles see configuring the cluster base high october 27 2025 sap high availability pacemaker use the recommended netweaver ha sapinstance automatic recover and monitor configuration the sapinstance primitive in pacemaker manages sap application instances guaranteeing their correct starting stopping and monitoring to enhance the stability of sap instances google cloud recommends setting the instance attribute for automatic_recover false additionally it is recommended to set the monitor operation to have a timeout value of 60 and an interval value set to 11 for sles and 20 for rhel from october 27th 2025 the severity of this evaluation rule has been updated from medium to critical this change also applies to existing evaluations that include this rule for more information see the guide for your os for rhel see creating resource for managing the a scs instance for sles see configuring the resources for ascs critical october 27 2025 sap high availability high availability verify the virtual host name configured for sap central services hosts to ensure high availability of sap central services in the default pfl file values for the serverhost and replicatorhost parameters need to align with the pacemaker cluster configuration this configuration ensures continued operation even if one of the hosts experiences a failure because the cluster can automatically failover to the other host from october 27th 2025 the severity of this evaluation rule has been updated from medium to critical this change also applies to existing evaluations that include this rule for more information view the profile parameters for the installed ensa version for ensa1 see profile parameters for the enqueue clients for ensa2 see profile parameters of enqueue replicator 2 critical october 27 2025 sap high availability pacemaker migrate from legacy gcpstonith fence agent the gcpstonith fencing module is deprecated migrate to the os bundled fence_gce fencing agent for optimal reliability and functionality with your pacemaker cluster on google cloud fence_gce is included in supported linux distributions with the high availability ha extension or add on from october 27th 2025 the severity of this evaluation rule has been updated from medium to high this change also applies to existing evaluations that include this rule for more information see the following guides to set up fencing for an ha cluster on rhel see set up fencing to set up fencing for an ha cluster on sles see set up fencing to migrate from gcpstonith to fence_gce see fence agent gcpstonith is deprecated high october 27 2025 sap high availability pacemaker set the high availability cluster migration threshold parameter to the recommended value for sap hana to migrate the sap hana resource to a new cluster node in the event of a failure in a linux pacemaker high availability cluster the sap hana resource definition must specify the migration threshold parameter with the recommended value of 5000 this parameter determines the number of errors before a failover occurs and marks the cluster node as ineligible to host the sap hana resource from october 27th 2025 the severity of this evaluation rule has been updated from caution to high this change also applies to existing evaluations that include this rule for more information see the guide for your os for rhel see ha cluster configuration guide for sap hana on rhel for sles see ha cluster configuration guide for sap hana on sles high october 27 2025 sap high availability pacemaker use the recommended monitor settings for health check and ilb in a pacemaker configuration on google cloud platform the health check primitive and the internal load balancer ilb primitive work together for high availability the health check monitors the instance s status by listening on a specific port while the ilb manages traffic routing the recommended monitoring sett...
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