Owner's manual

• 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.
Security
• 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.
Server Utilization
• (Network Utilization) Total Bytes/sec—Total bytes per second that a server 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. For details, see the Process Object: Page File Bytes information.
Memory
• Available KBytes —Amount of physical memory available to processes running on the computer.
It is calculated by summing space on the Zeroed, Free, and Stand-by memory lists. Free memory
is ready for use. Zeroed memory is memory filled with zeros to prevent later processes from
seeing data used by a previous process. Standby memory is memory removed from a working
set (its physical memory) of a process in route to a disk, but is still available to be recalled.
This counter displays the last observed value only; it is not an average.
• Pages/sec—Number of pages read from or written to disk to resolve hard page faults. Hard
page faults occur when a process requires code or data that is not in its working set or
elsewhere in physical memory, and must be retrieved from disk. This counter was designed
as a primary indicator of the faults that cause system-wide delays. It is the sum of Memory:
Pages Input/sec and Memory: Pages Output/sec. It is counted in numbers of pages, so it can
be compared to other counts of pages, such as Memory: Page Faults/sec, without conversion.
It includes pages retrieved to satisfy faults in the file system cache (usually requested by
applications) and in non-cached mapped memory files. This counter displays the difference
120 Agent information