I'd control wait event of IO from awr , avg time for db_file sequential read and for db file scattered read ... in any case I would look at awr reports even to evaluate the load of the 2 system . ciao 2012/11/5 Sudhakar G Pillai <sgnanap@xxxxxxxxx> > > All, > I appreciate if you could shed some light on which direction to go. I have > Solaris non-rac database running with 26GB SGA ( PDB-NONRAC(Solaris)) and > 3 node RAC database in Linux with 100GB SGA ( PDB-RAC ) . One of our > program runs 3 times slower on RAC vs Soalris. Same SQL code , same > plan, and same oracle version etc. Solaris has file system with Veritas > LVM and Linux has ASM. Here is the output of 10046: > SQL ID: 9txtqr9tdkcbs > Event waited on Times Max. Wait Total > Waited > > ---------------------------------------- Waited ---------- ------------ > PDB-NONRAC(Solaris) db file sequential > read 413468 0.32 234.99 > PDB-RAC(LINUX) db file sequential > read 434173 0.50 2138.24 > > Is it Veritas's LVM caching playing the role here vs no-caching in ASM? > > Thank you, > Sudhakar G Pillai > -- > //www.freelists.org/webpage/oracle-l > > > -- //www.freelists.org/webpage/oracle-l