what is "kfk: async disk IO"?

Hi,

can anyone please hint me to some information about
kfk: async disk IO ?

A little query on v$sessions gave me
USERNAME       EVENT    COUNT(*)
------------------------------
-------------------------------------------------- ----------
APPS       ges message buffer allocation  98
APPS       CSS operation: action   2
APPS       Streams AQ: waiting for messages in the queue   9
SYS       SQL*Net message to client   1
APPS       SQL*Net message from client 147
APPS       kfk: async disk IO 1646

as kfk: async disk IO is the bigest contributor, I'd like to investigate a
little bit.

for the records: 11.2.0.1 - 2 node RAC - RedHat 5.4 Linux 64-bit. (yes, it's
EBS - but don't ask me the exact pach level, please - I assume 11.5.10???)

thnx
 Martin

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