Excessive Hard Parsing after migration 10g => 11g (New AIX server)

Hi ,

Is it normal to have 31,6% DB time of hard parsing ?

Any idea ( scripts to monitor hard parsing , bind variables , cursors behavior ...)  to resolve this issue in 11.2.0.4  : after migration via exp/imp from 10g to 11g on a new AIX server ?

possible root causes ?

Best regards.

GD.

Time Model System Stats  DB/Inst: ADMINST Snaps: 1975-1985
-> Ordered by % of DB time desc, Statistic name

Statistic                                       Time (s) % DB time
----------------------------------- -------------------- ---------
sql execute elapsed time                         3,251.1      99.5
DB CPU                                           1,414.6      43.3
parse time elapsed                               1,057.4      32.4
hard parse elapsed time                          1,031.6      31.6
PL/SQL execution elapsed time                      221.6       6.8
repeated bind elapsed time                           2.7        .1
sequence load elapsed time                           2.1        .1
hard parse (sharing criteria) elaps                  1.2        .0