NFS V3 Client (NUK_NFSv3_Client)
Attributes (parameters)
The following attributes are available for this application class:
Name | Description | Unit | Default Performance Key Indicator (KPI) |
---|---|---|---|
Calls to create directory (CreateDirectory) | This parameter displays the percentage of all NFS client calls that are calls made to create directories. | % | No |
Calls to create new file (CreateFile) | This parameter displays the percentage of all NFS client calls made to create a new file. | % | No |
Calls to create hard link (CreateHardLink) | This parameter displays the percentage of all NFS client calls made to create hard links. | % | No |
Calls to create symbolic link (CreateSoftLink) | This parameter displays the percentage of all NFS client calls made to create symbolic links. | % | No |
Calls to retrieve file attributes (GetAttributes) | This parameter displays the percentage of all NFS client calls that are requests to get file attributes. Programs that check for the existence of a file tend to increase the value of this parameter. Recommendations To reduce network traffic and calls to the server, you can turn on client caching of file attributes. | % | No |
Calls to look up directory path (LookupDirectoryPath) | This parameter displays the percentage of all NFS client calls made to look up directory paths. A high percentage indicates a possible performance bottleneck in traversing NFS mounted directories. Recommendations Change the mount points that are causing a performance bottleneck to be nearer to the actual target directory. Because each UNIX system may have vastly different characteristics, no range thresholds have been set by default. With the combination of your experience with your system, your system's normal workload, and your system's documentation, you can set ranges that are useful. | % | No |
Null operations (NullOperations) | This parameter displays the percentage of NFS client calls that request no action other than acknowledgment. | % | No |
Calls to read file data (ReadData) | This parameter displays the number of all NFS client calls for reading data from files. | % | No |
Calls to read directory (ReadDirectory) | This parameter displays the percentage of all NFS client calls made to read directories. | % | No |
Calls to read symbolic link (ReadLink) | This parameter displays the percentage of NFS client calls made to read symbolic links. A high percentage indicates that performance could be suffering. A high percentage is often caused by a high number of symbolic links. Recommendations Remove symbolic links that are creating a pathname lookup bottleneck and replace them with an NFS mount to the link's target. Because each UNIX system may have vastly different characteristics, no range thresholds have been set by default. With the combination of your experience with your system, your system's normal work load, and your system's documentation, you can set ranges that are useful. | % | No |
Calls to remove directory (RemoveDirectory) | This parameter displays the percentage of all NFS client calls made to remove directories. | % | No |
Calls to remove file (RemoveFile) | This parameter displays the percentage of all NFS client calls made to remove files. | % | No |
Calls to rename file (RenameFile) | This parameter displays the percentage of all NFS client calls made to rename files. | % | No |
RPC calls (RPCCalls) | This parameter displays the total number of NFS client RPC calls made to the selected server by all clients. RPC calls made to other services, such as NIS, are not included in this count. This value is the cumulative number of RPC calls since the last time NFS was started. | # | Yes |
RPC calls retransmitted (RPCRetransmitted) | This parameter displays the number of NFS client RPC requests that had to be retransmitted. Calls are retransmitted because no response was received from the NFS server within the time-out period. An NFS client experiencing poor server response will have a large number of retransmitted calls. Note: This parameter does not appear if your version of the operating system does not report data for it. Recommendations Find the server that is causing the problem and determine what the problem is. Is the server or network down or overloaded? Is this a temporary problem? Because each UNIX system may have vastly different characteristics, no range thresholds have been set by default. With the combination of your experience with your system, your system's normal work load, and your system's documentation, you can set ranges that are useful. | # | No |
Calls to store file attributes (SetAttributes) | This parameter displays the percentage of all NFS client calls made to store file attributes. | % | No |
Calls to get file stats (StatFile) | This parameter displays the percentage of all NFS client calls made to retrieve file attributes or file statistics (since the last sample). Programs that check for the existence of a file tend to increase the value of this parameter. Recommendations To reduce network traffic and calls to the server, you can turn on client caching of file attributes. The defaults (Warning in the 75% to 90% range and Alarm in the 90% to 100% range) are reasonable for a typical system. However, knowing the characteristics of your system and its work load will help you determine whether to change the defaults. If you do not want to turn on client caching, you should turn off the range thresholds. | % | No |
Calls to write file data (WriteData) | This parameter displays the number of all NFS client calls made to write files. | % | No |