10053 shows Siebel parsing each statement 2 times : without and with bind variable

From: HansP <Hans-Peter.Sloot_at_atosorigin.com>
Date: Wed, 27 Jan 2010 09:38:28 -0800 (PST)
Message-ID: <c9828056-4e00-4af5-80b9-2d6c2a8789f0_at_e25g2000yqh.googlegroups.com>

Hi,
Oracle version 10.2.0.4
OS Linux 64 bit

I am investigating performance issue's on Siebel. I traced a session with the 10053 event to see the optimizer decisions.

It struck me too see that each statement appears 2 times in the trace. Both times with the same sql_id.
Furthermore the first parse does not show bind variables but the second does.

Does someone now whether this may be cause by a bug? Or is this a Siebel issue?

Further below the Peeking part of the trace.

{code}

---

Peeked values of the binds in SQL statement

---

kkscoacd
Bind#0
oacdty=01 mxl=2000(00) mxlc=00 mal=00 scl=00 pre=00 oacflg=00 fl2=0020 frm=01 csi=873 siz=2000 off=0 No bind buffers allocate

---

Peeked values of the binds in SQL statement

---

kxscoacd
Bind#0

oacdty=01 mxl=128(60) mxlc=15 mal=00 scl=00 pre=00
oacflg=00 fl2=1000010 frm=01 csi=873 siz=128 off=0
kxsbbbfp=2abb2fab5810 bln=128 avl=06 flg=05

value="0-R9NH

regards HP Received on Wed Jan 27 2010 - 11:38:28 CST