Sessions hanging

Hi List,
This is hanganalyze dump file:

Found 15 objects waiting for <cnode/sid/sess_srno/proc_ptr/ospid/wait_event>

<0/190/6488/0xdb6bde98/12701/library cache lock>
Open chains found:
Chain 1 : <cnode/sid/sess_srno/proc_ptr/ospid/wait_event> :

<0/79/27/0xdb6dc6a0/15367/No Wait>

• <0/190/6488/0xdb6bde98/12701/library cache lock>
• <0/185/318/0xdb6dad78/23551/library cache lock>
• <0/12/144/0xdb6d2fb0/1666/library cache pin> Other chains found: Chain 2 : <cnode/sid/sess_srno/proc_ptr/ospid/wait_event> :
  <0/16/66/0xdb6dc198/23559/library cache lock>
  Chain 3 : <cnode/sid/sess_srno/proc_ptr/ospid/wait_event> :
  <0/17/100/0xdb6c5c60/23962/library cache pin>
  Chain 4 : <cnode/sid/sess_srno/proc_ptr/ospid/wait_event> :
  <0/32/12/0xdb6dcba8/15369/No Wait>
  Chain 5 : <cnode/sid/sess_srno/proc_ptr/ospid/wait_event> :
  <0/39/1075/0xdb6e0d10/22710/library cache pin>
  

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shared_pool_size is 160M. sga is 1.7g.

Would increase help ?

Regards,
Ranko Mosic
Contract Senior Oracle DBA
B. Eng, Oracle 10g, 9i Certified Database Professional
Phone: 416-450-2785
email: mosicr_at_rogers.com
http://ca.geocities.com/mosicr@rogers.com/ContractSeniorOracleDBARankoMosicMain.html
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