HP Serviceguard Storage Management Suite for VERITAS manual Performance Issues, Low Memory

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Performance Issues

Quick I/O File system performance is adversely affected if a cluster file system is mounted with the qio option enabled and Quick I/O is licensed, but the file system is not used for Quick I/O files. Because qio is enabled by default, if you do not intend to use a shared file system for Quick I/O, explicitly specify the noqio option when mounting.

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 and /etc/llthosts files on all cluster nodes are not correct or identical.

12 Overview

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Contents HP Part Number Published April Edition Legal Notices Contents Preface Publishing HistorySupported Features Unsupported Features OverviewSG SMS Bundles Do Not Include VCS Cluster Communication Membership PortsFile system size limits Configuring low priority a link Maximum number of nodesSingle network option Split-brain and jeopardy handlingCFS Administration Creating CVM Disk Groups and CFS Mount PointsModular Style CFS Installation Issues Legacy StyleIncorrect permissions for root on remote system CFS Troubleshooting Inaccessible SystemResource Temporarily Unavailable Unmount FailuresCommand Failures Vxfs vxupgrade Error not primary in a cluster file systemEtc/mnttab is missing or you do not have root privileges Vxfs mount device already mountedPerformance Issues Low Memory
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