How to check bind peeking is happening for a sql

Hi Team,
11.2.0.3.5, RHEL-6 on 64 bit, 2 node RAC.
We have been continuously facing performance issues after upgraded to 11g. sqls were fine when we are in 10g and they started following un-optimized plans. I heard that 'automatic cursor sharing' is enabled by default in 11gr2. But how do we verify, whether a sql id peeking at its binds ? Can somebody share the query if you have ?
And also, any useful links regarding this pls suggest me.
Thanks,
Hari

Hi,
you can check this may it help you :ORACLE-BASE - Adaptive Cursor Sharing in Oracle Database 11g Release 1

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