Expand Configuration and Management Manual (G06.24+)

Subsystem Control Facility (SCF) Commands
Expand Configuration and Management Manual—523347-008
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STATS PATH Command
Current QIO MDs Used
indicates the current QIO message descriptors used. A message descriptor is an
internal structure used for sending and receiving messages to and from QIO.
Max QIO MDs Used
indicates the maximum QIO message descriptors used since the last statistics
reset or line-handler process start. A message descriptor is an internal structure
used for sending and receiving messages to and from QIO.
LEVEL 4 MESSAGE HISTOGRAM
is the overall count of messages sent and received by this node over this path,
classified by size in bytes since statistics were last reset using the STATS RESET
command, or since the line-handler process was started. The counts do not include
any passthrough traffic. Note that not every request is completed, because a
CANCEL request might have been issued.
LEVEL 4 DETAIL
is the total number of packets sent and received, broken down by message type,
since statistics were last reset using the STATS RESET command, or since the
line-handler process was started. Sent relates to packets originating from this
node. Rcvd refers to packets destined for this node.
The Expand message types reported are as follows:
LRQ LINK request
LCMP LINK completion message
CANCEL CANCEL request
ACK ACKNOWLEDGMENT
NAK Negative ACKNOWLEDGMENT
ENQ ENQUIRY request
PING PING requests and replies
L4 Packets Discarded
is the number of incoming Level 4 packets discarded because they were
duplicates or received too far out of sequence.
LCMP Mismatch Errors
is the number of incoming message completions discarded because they could
not be matched with a message link request.
Note. Since PING requests and PING replies only occur in pairs, only the sum of PING
requests and PING replies is shown. The Expand message types are defined and
described in Message Handling and Buffer Allocation on page 18-38.