ora file:
DEFAULT_SDU_SIZE=32767
For shared server processes, add the SDU setting to the DISPATCHERS setting in the instance
initialization parameter file:
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Chapter 15: Oracle Net 541
DISPATCHERS="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp))(SDU=32767))"
For dedicated server processes, edit the entries in the listener.ora file:
SID_LIST_listener_name=
(SID_LIST=
(SID_DESC=
(SDU=32767)
(SID_NAME=loc)))
Oracle Net Services provides support for the SDP protocol for Infiniband high-speed networks.
Applications using SDP place most of the messaging burden on the network interface card, thus
reducing the CPU requirements of the application. If you are using an Infiniband high-speed
network (such as for communications among your application tiers), see the Oracle documentation
for hardware and software configuration details.
Limiting Resource Usage
To limit the impact of unauthorized users on your system, you can reduce the duration for which
resources can be held prior to authentication. The time-limiting parameters listed earlier in this
chapter help to mitigate the performance problems caused by these unauthorized accesses. In the
listener.ora file, set the INBOUND_CONNECT_TIMEOUT_listener_name parameter to terminate
connections that are not authenticated by the listener within the specified time period. Failed
connections will be logged to the listener log file. In the server-side sqlnet.ora file, set the
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