TCP queue size (-Q) summary report

This report is displayed when the -Q option is specified on the trmdstat command. It displays the summary of TCP queue size events. The information presented in this report is derived from EZZ8662I, EZZ8663I, EZZ8664I, EZZ8665I, EZZ8666I, EZZ8667I, EZZ8668I, EZZ8669I, and EZZ8670I types of syslog messages. Information is sorted by remote IP addresses, and then by local ports.

>trmdstat -Q /tmp/tstlog.log
trmdstat for z/OS CS V2R1  Fri Nov 25 09:30:03 2011

Command Entered     : trmdstat -Q /tmp/tstlog.log
Log Time Interval   : Nov 10 15:24:11  - Nov 11 13:42:34
Stack Time Interval : Nov 10 15:23:50  - Nov 11 13:42:10
TRM Records Scanned : 227

                 TCP Queue Size Summary

                   Connections Reset

Remote IP Address: 2001:db8::20a:5eff:fe04:8f16

Local
Port  SendQReset RecvQReset OofOQReset
----- ---------- ---------- ----------
 1000          0          0          1  

Remote IP Address: 2001:db8:10::11:1:2

Local
Port  SendQReset RecvQReset OofOQReset
----- ---------- ---------- ----------
 1001          1          0          0  

                   TCP Queue Constraints

Remote IP Address: 2001:db8::20d:60ff:fe24:32ae

Local ------- SendQ Constraint ------- ------- RecvQ Constraint ------- ------- OofOQ Constraint -------
Port    Enter       Exit     Duration    Enter       Exit     Duration    Enter       Exit     Duration
----- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
 1000          0          0          0          1          1       3541          1          1       1044

Remote IP Address: 2001:db8:10::11:1:2

Local ------- SendQ Constraint ------- ------- RecvQ Constraint ------- ------- OofOQ Constraint -------
Port    Enter       Exit     Duration    Enter       Exit     Duration    Enter       Exit     Duration
----- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
 1000          1          1        756          0          0          0          0          0          0
 1001          1          1        497          0          0          0          0          0          0

The following information describes the areas of the TCP queue size summary report:

Remote IP Address

The remote IP address of the TCP connection. This value will be an IP address on the local TCP/IP stack when the IP addresses at both ends of the TCP connection reside on the local TCP/IP stack.

Local Port

The local port number of the TCP connection.

SendQReset

The number of TCP connections that were reset because there was either excessive or old data accumulating on the connection's send queue.

RecvQReset

The number of TCP connections that were reset because there was either excessive or old data accumulating on the connection's receive queue.

OofOQReset

The number of TCP connections that were reset because there was either excessive or old data accumulating on the connection's out-of-order queue.

SendQ Constraint

Enter: The number of times that a TCP connection's send queue entered constrained state because there was either excessive or old data accumulating on the queue.
Exit: The number of times that a TCP connection's send queue exited constrained state.
Duration: Specifies the accumulated duration, in seconds, that a TCP connection's send queue was constrained. Duration is non-zero only if at least one constraint condition has exited.

RecvQ Constraint

Enter: The number of times that a TCP connection's receive queue entered constrained state because there was either excessive or old data accumulating on the queue.
Exit: The number of times that a TCP connection's receive queue exited constrained state.
Duration: Specifies the accumulated duration, in seconds, that a TCP connection's receive queue was constrained. Duration is non-zero only if at least one constraint condition has exited.

OofOQ Constraint

Enter: The number of times that a TCP connection's out-of-order queue entered constrained state because there was either excessive or old data accumulating on the queue.
Exit: The number of times that a TCP connection's out-of-order queue exited constrained state.
Duration: Specifies the accumulated duration, in seconds, that a TCP connection's out-of-order queue was constrained. Duration is non-zero only if at least one constraint condition has exited.

messages suppressed

The number of attack messages suppressed with attack type, date and time. This data comes from an EZZ9327I message. See in The trmdstat report general concept for a detailed description.