Symantec VERITAS STORAGE FOUNDATION HP-UX - Manual (Page 66)

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Storage Foundation Cluster File System problems
Low memory
Under heavy loads, software that manages heartbeat communication links may
not be able to allocate kernel memory. If this occurs, a node halts to avoid any
chance of network partitioning. Reduce the load on the node if this happens
frequently.
A similar situation may occur if the values in the
/etc/llttab
files on all
cluster nodes are not correct or identical.