Solution : https://service.sap.com/sap/support/notes/488583 (SAP Service marketplace login required)
Key words : 
ziphp-ux 32-bitgeneral/3rdparty/oracle/hp_ux11, zipcompaq tru64general/3rdparty/oracle/compaq_tru64/8, 100m /alter system set log_checkpoint_interval = 20480, free buffer waits      andlatch freeif, /general/3rdparty/oracle/hp_ux11, general/3rdparty/oracle/compaq_tru64/8, general/3rdparty/oracle/hp_ux64/8, general/3rdparty/oracle/linux/8, general/3rdparty/oracle/solaris_64/8, /general/3rdparty/oracle/hp_ux64/8
Related Notes : 
       
| 767414 | FAQ: Oracle latches | 
| 619188 | FAQ: Oracle wait events | 
| 362068 | Supplement to Oracle migration/upgrade to 8.1.7: UNIX | 
| 362060 | Current patch set for Oracle 8.1.7 | 
| 354080 | Note collection for Oracle performance problems |