HP Insight Management Agents - Manual (Page 115)

numbers of soft faults without consequence. However, hard faults can cause significant
delays. This counter displays the difference between the values observed in the last two
samples, divided by the duration of the sample interval.
• Cache Bytes—Sum of the System Cache Resident Bytes, System Driver Resident Bytes,
System Code Resident Bytes, and Pool Paged Resident Bytes counters. This counter displays
the last observed value only; it is not an average.
• Cache Faults/sec—Number of faults, that occur when a page sought in the file system cache
is not found and must be retrieved from elsewhere in memory (a soft fault) or from disk (a
hard fault). The file system cache is an area of physical memory that stores recently used
pages of data for applications. Cache activity is a reliable indicator of most application I/O
operations. This counter counts the number of faults, without regard for the number of pages
faulted in each operation.
• Pool Nonpaged Bytes—Number of bytes in the nonpaged pool, an area of system memory
(physical memory used by the operating system) for objects that cannot be written to disk,
but must remain in physical memory as long as they are allocated. Memory: Pool Nonpaged
Bytes is calculated differently than Process: Pool Nonpaged Bytes, so it might not equal
Process: Pool Nonpaged Bytes: _Total. This counter displays the last observed value only;
it is not an average.
• Cache Copy Reads/sec—Frequency of reads from pages of the file system cache that involve
a memory copy of the data from the cache to the application's buffer.
• Cache Copy Read Hits %—Percentage of cache copy read requests that hit the cache, that
is, they did not require a disk read to provide access to the page in the cache. A copy read
is a file read operation that is satisfied by a memory copy from a page in the cache to the
buffer of the application.
Network
TCP
• Active Connections—Number of times TCP connections have made a direct transition to
the SYN-SENT state from the CLOSED state.
• Established Connections—Number of TCP connections for which the current state is either
ESTABLISHED or CLOSE-WAIT.
• Segments/sec—Rate at which TCP segments are sent or received using the TCP protocol.
• Segments Retransmitted/sec—Rate at which segments are retransmitted, that is, segments
transmitted containing one or more previously transmitted bytes.
• Connection Failures—Number of times TCP connections have made a direct transition to
the CLOSED state from the SYN-SENT state or the SYN-RCVD state, and the number of
times TCP connections have made a direct transition to the LISTEN state from the SYN-RCVD
state.
Controller
• Total Bytes/sec—Rate at which bytes are sent and received on the interface, including framing
characters.
• Packets/sec—Rate at which packets are sent and received on the network interface.
• Output Queue Length—Length of the output packet queue (in packets). If this length is
longer than 2, delays are being experienced and the bottleneck should be found and
eliminated if possible. Since the requests are queued by the Network Driver Interface
Specification or NDIS in this implementation, this length is always set to zero.
• Packet Outbound Errors—Number of outbound packets that could not be transmitted
because of errors.
• Packet Receive Errors—Number of inbound packets that contained errors preventing them
from being deliverable to a higher-layer protocol.
Sub-system Classification 115