System Up Time—Elapsed time (in seconds) that the computer has been running since it was last started. This counter displays the difference between the start time and the current time.
Total Threads—Number of threads in the computer at the time of data collection. This count is an instantaneous count, not an average over the time interval. A thread is the basic executable entity that can execute instructions in a processor.
Context Switches/sec—Combined rate at which all processors on the computer are switched from one thread to another. Context switches occur when a running thread voluntarily relinquishes the processor, is pre-empted by a higher priority ready thread, or switches between user mode and privileged (kernel) mode to use an executive or subsystem service. The context switches/sec rate for all threads running on all processors in the computer is measured in numbers of switches. Context switch counters on the system and thread objects display the difference between the values observed in the last two samples, divided by the duration of the sample interval.
Processor Queue Length—Number of threads in the processor queue. There is a single queue for processor time even on computers with multiple processors. Unlike the disk counters, this counter counts ready threads only, not threads that are running. A sustained processor queue of greater than two threads generally indicates processor congestion. This counter displays the last observed value only; it is not an average.
Total Processes—Number of processes in the computer at the time of data collection. This count is an instantaneous count, not an average over the time interval. Each process represents the running of a program.
% Registry Usage —Percentage of the Total Registry Quota Allowed that is currently being used by the system. This counter displays the current percentage value only; it is not an average.
Access Permission Errors—Number of times opens on behalf of clients has failed with STATUS_ACCESS_DENIED. This object can indicate random attempts to access files that are not properly protected.
Access Granted Errors—Number of times access to files opened successfully were denied. This object can indicate attempts to access files without proper access authorization.
Server Logon Errors—Number of failed logon attempts to the server. This object can indicate whether the password guessing programs are being used to violate the security on the server.
Server Sessions Errored-Out—Number of sessions that have been closed because of unexpected error conditions or sessions that have reached the auto-disconnect timeout and have been disconnected normally.
(Network Utilization) Total Bytes/sec—Total bytes per second that aserver has sent to and received from the network. This value provides an overall indication of how busy the server is.
Server Sessions—Number of sessions currently active in the server. This object indicates current server activity.
Context Block Queue/sec—Rate per second at which the work context blocks must be placed on the FSP queue of the server to await server action.
% Total PageFile Usage (Thresholds Supported) —Amount in percent of the Page File instance in use. Refer to Process Object: Page File Bytes.