High Utilization

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Revision as of 21:16, 30 November 2007 by Snidelydev (Talk | contribs) (Updated forum links.)

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Draft High Utilization Wiki

Starting point for wiki article on diagnosing high utilization

High Utilization is a popular topic in the support forums (novell.support.netware.6x.abends-hangs, for instance, and this forum is mirrored in novell.support.open-enterprise-server.netware.abend-hangs; see also novell.support.netware.6x.administration-tools/novell.support.open-enterprise-server.netware.administration-tools). The 6x forums are also accessible under the OES forum folders: OES NW Abend Forum. For older systems, see NW5.x Abend Forum; the 4.x forums are nearby for those on an accelerated update path.

High utilization can keep a system administrator's phone or help desk busy, as users may experience delays in accessing files or print services or web pages.

Finding the Thread

Use the following techniques to find the thread (a unit of processor execution) that is the cause of the high utilization.

Use Monitor.nlm (tab to "next window", then select Kernel->Busiest Threads) or NRM (Diagnose Server->Profile/Debug->Profile CPU Execution by NLM) to see what is listed. If you're uncertain about the meaning of what you see, paste the output from one these tools into a posting in the support forums.

Note that threads listed as "server 09" and such are generally handling NCP requests from clients, so if such a thread is busiest, then check your workstations.

Abend Hunting

High Utilization sometimes turns into an Abend. See the following article for more on diagnosing an Abend AbendHunting.

Room for Corrections

Looking forward to the sysops' notes on this page.