SQL*Net - Where is the missing millisecond ?

I have done a SQL*Net trace and when i examine the trace file, 15 milliseconds have disappeared ?? Can someone explain me this ?
Here, i partial copy/paste from the trace file :
[15-NOV-2005 11:29:06:312] nttbnd2addr: entry
[15-NOV-2005 11:29:06:312] nttgetport: entry
[15-NOV-2005 11:29:06:312] nttgetport: port resolved to 1637
[15-NOV-2005 11:29:06:312] nttgetport: exit
--> [15-NOV-2005 11:29:06:312] nttbnd2addr: looking up IP addr for host: OSCT
--> [15-NOV-2005 11:29:06:327] nttbnd2addr: exit
[15-NOV-2005 11:29:06:327] nsc2addr: normal exit
[15-NOV-2005 11:29:06:327] nsopen: entry
[15-NOV-2005 11:29:06:327] nsmal: entry
I want to be able to reduce this weird millisecond.
Thanks !

I would first ask why you're focusing on these 15 milliseconds. Do you have reason to believe that this 15 milliseconds is a performance problem? Is it a major coponent of some business process that is running too slowly? Would eliminating these 15 milliseconds have a noticable impact on some business performance metric?
If the 15 millisecond IP address lookup is a significant performance issue for you, that would seem to imply that either you have an almost impossibly perfectly tuned application and you should stop tuning or that you need to concentrate on the number of times this routine is called (i.e. reducing the number of connections you make) rather than focusing on reducing the time to resolve a host name. If the 15 milliseconds is not a significant performance issue for you, you ought to focus your time and effort on the real bottlenecks.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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~~~~~~~~~~~~
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: Adrian Maier
: [email protected]
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SQL*Net - Where is the missing millisecond ?

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