• Network-Related Performance Counters
    		•

    Performance Tuning Guidelines for Windows Server 2012 April 12, 2013 Abstract




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    TCP Parameters


    The following registry keywords from Windows Server 2003 are no longer supported, and they are ignored in Windows Server 2012, Windows Server 2008 R2, and Windows Server 2008:

    TcpWindowSize

    HKLM\System\CurrentControlSet\Services\Tcpip\Parameters



    NumTcbTablePartitions

    HKLM\system\CurrentControlSet\Services\Tcpip\Parameters



    MaxHashTableSize

    HKLM\system\CurrentControlSet\Services\Tcpip\Parameters


    Network-Related Performance Counters


    This section lists the counters that are relevant to managing network performance.

    Resource Utilization

    • IPv4, IPv6

      • Datagrams Received/sec

      • Datagrams Sent/sec

    • TCPv4, TCPv6

      • Segments Received/sec

      • Segments Sent/sec

      • Segments Retransmitted/sec

    • Network Interface(*), Network Adapter(*)

      • Bytes Received/sec

      • Bytes Sent/sec

      • Packets Received/sec

      • Packets Sent/sec

      • Output Queue Length

    This counter is the length of the output packet queue (in packets). If this is longer than 2, delays occur. You should find the bottleneck and eliminate it if you can. Because NDIS queues the requests, this length should always be 0.

    • Processor Information

      • % Processor Time

      • Interrupts/sec

      • DPCs Queued/sec

    This counter is an average rate at which DPCs were added to the logical processor's DPC queue. Each logical processor has its own DPC queue. This counter measures the rate at which DPCs are added to the queue, not the number of DPCs in the queue. It displays the difference between the values that were observed in the last two samples, divided by the duration of the sample interval.

    Potential Network Problems

    • Network Interface(*), Network Adapter(*)

      • Packets Received Discarded

      • Packets Received Errors

      • Packets Outbound Discarded

      • Packets Outbound Errors

    • WFPv4, WFPv6

      • Packets Discarded/sec

    • UDPv4, UDPv6

      • Datagrams Received Errors

    • TCPv4, TCPv6

    • Network QoS Policy

      • Packets dropped

      • Packets dropped/sec

    • Per Processor Network Interface Card Activity

      • Low Resource Receive Indications/sec

      • Low Resource Received Packets/sec

    • Microsoft Winsock BSP

      • Dropped Datagrams

      • Dropped Datagrams/sec

      • Rejected Connections

      • Rejected Connections/sec

    Receive Side Coalescing (RSC) performance

    • Network Adapter(*)

      • TCP Active RSC Connections

      • TCP RSC Average Packet Size

      • TCP RSC Coalesced Packets/sec

      • TCP RSC Exceptions/sec


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    Performance Tuning Guidelines for Windows Server 2012 April 12, 2013 Abstract

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