Explanation
This message is the first in a group of messages
that displays tuning statistics for a SNA controller. A complete description
of the message group follows.
IST440I TIME = time DATE = date ID = id
IST441I DLRMAX = dlrmax CHWR = chwr CHRD = chrd
IST442I ATTN = attn RDATN = rdatn IPDU = ipdu
IST443I OPDU = opdu RDBUF = rdbuf SLODN = slodn
IST1568I INLP = inlp ONLP = onlp BFNLP = bfnlp
IST314I END
IST440I - time indicates the time (in hours, minutes,
seconds, and hundredths of seconds) at which the record is recorded.
For example, 07431380 means that the record was recorded at the 7th
hour, 43rd minute, 13th second, and 80 one-hundredths of a second
of the day.
- date is the date on which the tuning statistics
report is recorded. The date is in the form yyddd,
where yy is the last two digits of the numeric
year and ddd is the numeric day of the year.
For example, 00190 means the record is recorded on the 190th day of
2000.
- id is the name of the user-defined channel-attached
SNA cluster controller or the name of the channel link that attaches
the communication controller for which the statistics are gathered.
For a VTAM-generated channel-link name, this field contains the channel
unit address followed by "-L."
IST441I - dlrmax is a decimal value that indicates the
maximum number of dump-load-restart requests that were awaiting processing
or were being processed at one time during the interval. This number
refers to the entire domain, not to the SNA controller named in the
report. The dump-load-restart subtask processes the following types
of requests:
- Dump, load, or restart of an NCP
- Some VTAM® messages to the
operator that require a reply
- Session establishment and termination processing for a local major
node
- Any I/O to a configuration restart or NODELST file.
- This value can be used to determine the proper setting for the
DLRTCB start option, which determines how many dump-load-restart requests
can be processed concurrently. If DLRMAX consistently exceeds DLRTCB,
it indicates that VTAM is serializing
requests on the available TCBs and that performance might be affected.
- chwr is a decimal value that indicates the
total number of write channel programs issued during the interval
covered by this record.
- chrd is a decimal value that indicates the
total number of read channel programs issued to read data. It does
not include the read that informs the cluster controller to clear
its buffers.
IST442I - attn is a decimal value that indicates the
total number of attention interrupts received from a controller, including
the total number of READ ATTENTIONs (RDATN).
- rdatn is a decimal value that indicates the
total number of times that the attention is included in the ending
status on a read channel program (that is, the number of times that VTAM, after reading data, is requested
with an attention to read more data).
- ipdu is a decimal value that indicates the
total number of inbound (to VTAM)
PDUs received from this controller.
IST1568I - inlp is a decimal value that indicates the
total number of inbound (to VTAM)
NLPs received from this controller.
- onlp is a decimal value that indicates the
total number of outbound (from VTAM)
NLPs sent to this controller.
- bfnlp is a decimal value that indicates the
total number of bytes read from inbound NLPs.
System action
Operator response
Follow the instructions of the system programmer
to tune the system. To discontinue statistics recording, enter the
MODIFY NOTNSTAT command.
System programmer response
Routing code
Descriptor code