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Resource Model Reference


Thresholds

The following table lists the thresholds that can be set for the Network Interface Card resource model. For each threshold it shows the name, a short description, and the default value:

Threshold Description Default
High Current Commands Modifier (HighCurrCmdsMod) This threshold counts the requests to the redirector that are currently queued for service. If this number is much larger than the number of network adapter cards installed in the computer, the networks, servers, or both being accessed have a serious bottleneck. This value is used in conjunction with the number of network cards installed on the system. The final threshold value is calculated by multiplying the number of network cards in the system by this threshold.
10
High Errored Out Ratio (HighErroredOutRatio) This threshold indicates the ratio of sessions being errored out in comparison to sessions either logging out or being timed out. This number is a percentage generated by dividing the number of sessions errored out by the sum of the sessions forced off (timed out) and logged off.
50
High Output Queue Length Modifier (HighOutputQueueLengthMod) The network card has an output queue that is used to queue network requests. This threshold is a modifier that can be adjusted by the administrator to adjust the threshold for the output queue length for the network interface. This threshold is calculated using the total number of network interface cards in the system plus this value.
3
High Percent Broadcast (HighPercentBroadcast) This threshold measures the percentage of broadcast frames on the internal network segment.
90
High Percent Bytes Per Second (HighPercentBytesSec) To test for a high amount of bytes per second, a dynamic threshold value needs to be created based on the current bandwidth of the network interface card. Because there will be an internal dynamic calculation, the threshold value is a percentile that indicates what percentage of the bandwidth is considered too high. For example: 830 KBPS is considered high for 10 MB ethernet networks. This value is about 8 percent.
9
High Percent Utilization (HighPercentUtilization) This threshold determines at what point the network utilization of the internal segment is too high.
40
High Work Item Shortages (HighWorkItemShortages) This occurs when no work item is available, or no work item can be allocated to service the incoming request. A work item is used when the server service receives a request. HighWorkItemShortages indicates that the initial work items or maximum work items parameters may need tuning.
10


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