HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 200

Adjust operating system parameters HP Scalable NAS includes a script called SizingActions that configures certain operating system parameters to improve system performance, particularly in a file serving environment. The changes improve network throughput and make better use system memory. On HP X5500 Storage Gateway for Linux/HP Scalable NAS Clustered Gateway servers and HP 4400 Scalable NAS File Services systems, additional changes are made to tune the operating system for the hardware provided with those systems. The SizingActions script is run when HP Scalable NAS starts up. The script does not determine whether the system parameters it adjusts have been modified from their default values by a user on the system. This can be an issue if, for example, you are running an application that requires system parameters such as vmem_max or mmem_max to be modified, typically in the /etc/sysctl.conf file. If you do adjust system parameters to support external applications such as Oracle, you should disable the SizingActions script as described below. Because disabling the script will typically result in a degradation to network file serving performance, HP recommends that you do this only if you must adjust parameters for best performance for your application. HP does not recommend manually editing the SizingActions script, as it may be replaced during an upgrade or hotfix and those changes will not be preserved during the upgrade process. To disable the SizingActions script, execute the following steps on each server in the cluster: 1. Go to the directory containing the SizingActions script: # cd /etc/opt/hpcfs 2. Run the following command: # chmod 444 SizingActions 3. Reboot the node to ensure that the SizingActions parameters are cleared from the system. The SizingActions script will now be inactive at system start. 200 Configure FS Option for Linux