HOST: NETWORK UTILIZATION

Operating SystemPerformanceWindows

Symptoms: Network utilization levels are above threshold

Impact: Medium

Slow SQL responses will degrade the user experience, resulting in poor efficiency of your organization’s operations.

Expected behavior :

There is no standard metric for network activity. Many aspects of the environment will affect the network load.

This threshold measures usage level in percentage of network bandwidth transfer from/to server.

Possible causes

High network traffic – system  Priority: Medium
Unusual levels of traffic may be coming from external operations (backups, restores, etc from networked data stores)

Recommended action :

Where possible, concentrate non-SQL Server related activities onto a separate network. Also, schedule high-volume activities to time frames of lowest user demand.

SQL queries with high disk I/O requiring data traffic to storage  Priority: Medium
This problem is specifically relevant to environments with networked storage.

Recommended action :

If possible, log storage disks should be physically linked to the server, or over a separate network. To otherwise minimize traffic, see our recommendations regarding page file optimization here.

Network errors or inefficient network structure  Priority: Medium
Faulty or inadequate hardware components, such as routers, controllers etc. with low bandwidth capabilities can significantly slow down traffic.

Recommended action :

Investigate all hardware components, with your Network Management team.
See our recommendations regarding network latency here.

Background

This measure of traffic is closely associated with network latency. See here.

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