name-service call wait in RAC

Hi,
Oracle version :- 11.2.0.2

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



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