Explanation
As a result of a D TCPIP,jobname,XCF,STATS
command a table of statistics for the administration connections
that are used between the Telnet LU name requestor (LUNR) and the
Telnet LU name server (LUNS) telnet jobs in a Telnet XCF GROUP is
displayed.
Each connection displayed produces three rows
in the table. The first row identifies the LUNR by connection.
The second row shows the values for the last complete XCF Monitor
interval. The third row shows the weighted average of those values
over the last ten completed XCF Monitor intervals. Each 3-digit
table value represents either an amount of time or a record count.
Time
values can be one of the following:
- A number ending with U to indicate that the value is expressed
in microseconds
- A number ending with M to indicate that the value is expressed
in rounded milliseconds
- A number ending with S to indicate that the value is expressed
in rounded seconds.
Record count values can be one of the following:
- A number only to indicate that the value is an exact count
- A number ending with K to indicate that the value is expressed
in rounded thousands
- A number ending with M to indicate that the value is expressed
in rounded millions
The table column headers are displayed if the queried
telnet job is either an active LUNR or an active LUNS.
If
the queried telnet job is an active LUNR, information is displayed
for its administration connection to the current LUNS.
If
the queried telnet job is an active LUNS, the ====PARTNERS==== separator
line is displayed followed by information for the administration
connection from each LUNR partner.
The following example
shows the format of the EZZ6088I message and its table of statistics:
EZZ6088I TELNET XCF STATISTICS
INTERVAL: xm PEND RECV SEND
NEXT UPDATE: nu RTT RCRD TIME RCRD TIME RCRD
mvsname tnname ----- ----- ----- ----- ----- -----
LAST: lrtt lpndr lrcvt lrcvr lsndt lsndr
AVG: artt apndr arcvt arcvr asndt asndr
====PARTNERS=====
mvsname tnname ----- ----- ----- ----- ----- -----
LAST: lrtt lpndr lrcvt lrcvr lsndt lsndr
AVG: artt apndr arcvt arcvr asndt asndr
In
the message text:
- jobname
- The name of the procedure that is used to start the TN3270 server
or the job name identifier of the procedure that is used to start
the TN3270 server.
If you start the TN3270.TNSRV1 server, the jobname value
TNSRV1. If you start the TN3270 server, the jobname value
is TN3270
- xm
- The time interval for statistics calculations. The interval is
internally set to 60S.
- nu
- The number of seconds remaining until the next interval completes
and the display values are updated.
- mvsname
- The name of the MVS™ system
on which the Telnet LUNR or LUNS resides.
- tnname
- The job name of the Telnet LUNR or LUNS.
- lrtt
- The amount of time the slowest heartbeat record took to complete
a round trip in the last interval. The LUNR and the LUNS each send
four heartbeat records in each of their respective XCFMONITOR intervals,
but no more than one every 15 seconds. The roundtrip time includes
the time spent in the Telnet outbound record queue on the sender,
in TCP/IP send buffers, in the network, in TCP/IP receive buffers,
in the Telnet inbound record queue on the receiver, in the Telnet
outbound record queue on the receiver, in TCP/IP send buffers, in
the network, in TCP/IP receive buffers, and in the Telnet inbound
record queue on the sender.
- lpndr
- The number of records sent to the partner that are still pending
a response at the end of the last interval. This number is typically
low, but might show brief spikes when shared LU administration work
loads are heavy.
- lrcvt
- The amount of time spent processing records received over the
connection during the last interval. This value should vary proportionately
with the number of records received. A very high value with a low
number of records might indicate that this Telnet is stalled. The
value 0 might indicate a network problem.
- lrcvr
- The number of records received over the connection during the
last interval. This value includes responses to heartbeat records
so it should usually be at least 4.
- lsndt
- The amount of time spent processing records sent out over the
connection during the last interval. This value includes time spent
waiting for the outbound socket to unblock during writes. A very
high value might indicate network congestion or a stalled Telnet partner.
- lsndr
- The number of records sent over the connection during the last
interval. This value includes heartbeat records so it should usually
be at least 4.
- artt
- The weighted average of heartbeat round trip times over the last
ten intervals.
- apndr
- The weighted average of pending records over the last ten intervals.
- arcvt
- The weighted average of time spent processing records received
over the last ten intervals.
- arcvr
- The weighted average of records received over the last ten intervals.
- asndt
- The weighted average of time spent processing records sent out
over the last ten intervals.
- asndr
- The weighted average of records sent over the last ten intervals.
System action
Telnet processing continues.
Operator response
System programmer response
User response
Problem determination
Source
z/OS® Communications
Server TCP/IP: TN3270E Telnet Server
Module
Routing code
Descriptor code
Automation
Example
EZZ6088I TELNET XCF STATISTICS
INTERVAL: 60S PEND RECV SEND
NEXT UPDATE: 25S RTT RCRD TIME RCRD TIME RCRD
MVS020 TLUNSR ----- ----- ----- ----- ----- -----
LAST: 753U 0 766U 8 1M 7
AVG: 715U 0 826U 6 2M 7
====PARTNERS=====
MVS020 TLUNR1 ----- ----- ----- ----- ----- -----
LAST: 983U 0 4M 2 3M 27
AVG: 981U 0 18M 362 3M 26
MVS020 TLUNR2 ----- ----- ----- ----- ----- -----
LAST: 910U 0 829U 8 1M 7
AVG: 904U 0 15M 343 1M 7
MVS020 TLUNSR ----- ----- ----- ----- ----- -----
LAST: 688U 0 639U 7 1M 6
AVG: 988U 0 1M 9 1M 7
17 OF 17 RECORDS DISPLAYED