HP Tru64 UNIX and TruCluster Server Version 5.1.B-4 Patch Summary and Release Notes (13156)

tcp_syn_win = -1
# sysconfig -r inet tcp_syn_win=2048
tcp_syn_win: reconfigured
# sysconfig -q inet tcp_syn_win
inet:
tcp_syn_win = 2048
# sysconfig -q inet tcp_syn_win /tmp/tcp_syn_win_merge
# sysconfigdb -m -f /tmp/tcp_syn_win_merge inet
# sysconfigdb -l inet
inet:
tcp_syn_win = 2048
3.2.2.4 Modification to Changer Driver May Affect Some Applications
As a side effect of resolving issues with multiple access to the changer, the changer driver now
requires a short period of exclusive access to the changer device as part of opening the device.
For applications that have several threads or processes accessing a single changer simultaneously,
this can result in waits for access to the changer device in the process of an open call. That wait
can be lengthy as some changer commands can have long response times.
In general this behavioral change will not affect the overall throughput to a changer device, as
this wait would have occurred at the time of any I/O (for example, IOCTLS) to the changer.
If having the changer wait in this fashion presents a problem, the old behavior can be
approximated by passing either the O_NONBLOCK or O_NDELAY flags at the open of the changer
device. In that situation the first actual I/O (usually an IOCTL) may incur the wait as the open
is partially delayed in that case.
3.2.2.5 Data Sorting of Audit Records May Be Required on Single CPU System
The net_tcp_stray_packet, net_udp_stray_packet, and net_tcp_rejectd_conn
network events are handled by the audit subsystem differently from other auditable events. As
a result, these events may be placed into the audit log out of order with respect to other events.
Previously, the sorting of audit data on single CPU systems was unnecessary. This changed,
however, when the capability for auditing these network events was introduced. Now, to view
these network events in order with respect to other events, you must sort the data on a single
CPU system. To do this, use the audit_tool -S command.
3.2.2.6 new_wire_method Tunable Attribute Retired
The tunable attribute new_wire_method has been retired. After you install this kit, setting
new_wire_method to either 0 or 1 will no longer affect your system.
3.2.2.7 Stopping Daemons May Speed Adminstration Performance
When using AdvFS administration commands, the advfsd and smsd daemons rescan filesets,
domains and volumes for system information. Depending on the number of filesets, domains,
and volumes, you may experience a pause — sometimes quite long — between the commands.
If you experience this performance degradation, you may want to stop advfsd (required for
dtadvfs, the AdvFS graphical user interface) and smsd (required for SysMan Station) daemons
before running multiple AdvFS administration commands.
See “New Variable Aids Performance of AdvFS Administration Commands” for information on
disabling the advfsd daemon at boot time.
To temporarily stop the daemons enter the following commands:
50 Tru64 UNIX Patches