name-service call wait in RAC

I have a two node RAC in IBM AIX.When we simulate 25 user load,I could see the following events in AWR.I have resolved direct path read. What is 'name-service call wait' event?I could not get much information from internet.Kindly throw some light on this.

Event

Waits

Time(s)

Avg wait (ms)

% DB time

Wait Class

DB CPU 1,007

50.16

direct path read

53,425

251

5

12.52

User I/O

name-service call wait

63

3

45

0.14

Other

control file sequential read

1,093

2

2

0.09

System I/O

latch: cache buffers chains

15,961

2

0

0.08

Concurrency

Thanks and Regards,
Nisha Mohan.A

• CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***

--
http://www.freelists.org/webpage/oracle-l