Kksfbc child completion

Oracle: kksfbc child completion

I've run into the wait "kksfbc child completion" a few times over the past but found very little written about it. I don't have an explanation, but I have something that might be as good - a way to reproduce it. By being able to reproduce I at least test theories about it. I ran a tight loop of

insert into t value(1);

See anything strange? I put "value" instead of "values" so the insert errored out. Thus causing parsing every execute. So this wait seems to be related to parsing. Could run further tests by correcting and adding a different literal value to the insert to see what kind of waits might result. Another tell tale sign that there was an error was that I also received "SQL*Net break/reset to client" which is a sign of an error in the sql statements that the application is attempting to execute.

http://www.orafaq.com/maillist/oracle-l/2007/02/11/0800.htm

From: K Gopalakrishnan <kaygopal_at_gmail.com>

Date: Sun, 11 Feb 2007 02:00:45 -0500

Message-ID: <3b0f44a10702102300h3b9120dh139c030da47878e@mail.gmail.com>

David,

kks is Kompilation Layer function to Find the Bounded Cursor. Typically related to parsing (hard) which sometimes calls kksscl to scan the child list on those cursors when the cursors are shared.

What is your cursor_sharing set to and do you see excessive waits? Or the question is just academic?