11g kokc latching problem??

Hi Gurus,
We had started some online performance testing of our application on 11g ( 11.1.0.7) . There seems to be a severe latching problem on kokc descriptor latch. I understand that this is a new latch in 11g and not able to find anything beyond that. The same test went fine on 10g R2. Metalink has no hits on this have any one of you faced a similar problem in 11g and any possible hints/undocumented parameters that can help?

have copied relevant sections from AWR

 Top 5 Timed Foreground Events

*Event*

*Waits*

*Time(s)*

*Avg wait (ms)*

*% DB time*

*Wait Class*

latch free

566,894

184,570

326

93.68

Other

DB CPU 10,676

5.42

log file sync

76,340

1,184

16

0.60

Commit

library cache: mutex X

2,283,183

360

0

0.18

Concurrency

SQL*Net more data from client

105,660

117

1

0.06

Network

Latch Statistics

Latch Name

Get Requests

Pct Get Miss

Avg Slps /Miss

Wait Time (s)

NoWait Requests

Pct NoWait Miss

kokc descriptor allocation latch

3,968,130

18.59

0.88

174283

0

Latch Miss Source

*Latch Name*

*Where*

*NoWait Misses*

*Sleeps*

*Waiter Sleeps*

kokc descriptor allocation latch

kokcdlt: regular free

0

327,851

265,626

kokc descriptor allocation latch

kokcdlt: allocation

0

321,646

383,871

• * Best Regards,

Sriram Kumar

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