Hi Karl, Neither can I make out anything from this..... Sorry: One of those mysteries. John On Sat, Mar 13, 2010 at 7:34 PM, K R <kp0773@xxxxxxxxx> wrote: > Thanks John, > > from node-1 > > CR Current Inst No Block Class Blocks Received % Immed % Busy % Congst > Blocks > Received % Immed % Busy % Congst 1 data block 5,865 99.13 0.68 0.19 > 116,160 92.72 0.00 7.28 1 Others 16 100.00 0.00 0.00 50 100.00 0.00 0.00 1 > undo > header 11 81.82 18.18 0.00 10 100.00 0.00 0.00 1 undo block 1 100.00 0.00 > 0.00 0 > > > from node-2 > CR Current Inst No Block Class Blocks Received % Immed % Busy % Congst > Blocks > Received % Immed % Busy % Congst 2 data block 236 97.88 2.12 0.00 740,773 > 99.78 0.00 0.22 2 Others 832 100.00 0.00 0.00 152 100.00 0.00 0.00 2 undo > header 129 100.00 0.00 0.00 11 90.91 9.09 0.00 2 undo block 1 100.00 0.00 > 0.00 0 > > > > > > somehow I am not able to relate the 218.12% buffer cache and > buffer-cache disk of -119.42 > > > > > > > > > > > -Kart > > > On Sat, Mar 13, 2010 at 5:26 PM, John Kanagaraj > <john.kanagaraj@xxxxxxxxx>wrote: > >> Kart, >> >> Without know what *else* was running at that time, it is only possible to >> guess. Having the complete AWR report (from both nodes, and assuming 10g) >> may help. Specifically, look at the last few sections of a RAC AWR report >> that lists type and statistics of GC traffic. >> >> John >> >> >> On Sat, Mar 13, 2010 at 12:15 PM, K R <kp0773@xxxxxxxxx> wrote: >> >>> Hi, >>> >>> in one of our 2 node -RAC database in one node >>> >>> I observe >>> >>> Instance Efficiency Percentages (Target 100%) >>> >>> Buffer Nowait %: 92.30 Redo NoWait %: 100.00 Buffer Hit %: 218.12 >>> In-memory >>> Sort %: 100.00 Library Hit %: 99.07 Soft Parse %: 98.18 Execute to Parse >>> %: 47.41 Latch Hit %: 99.74 Parse CPU to Parse Elapsd %: 1.77 % >>> Non-Parse CPU: 88.86 >>> >>> Global Cache Efficiency Percentages (Target local+remote 100%) >>> >>> Buffer access - local cache %: 43.86 Buffer access - remote cache %: >>> 2.09 Buffer access - disk %: 54.05 >>> >>> and in other node I observe >>> >>> >>> Global Cache Efficiency Percentages (Target local+remote 100%) >>> >>> Buffer access - local cache %: 167.99 Buffer access - remote cache %: >>> 51.42 Buffer access - disk %: -119.42 >>> >>> would appreciate any suggestion on why there is a 3 digit disk% on node >>> 2 and a 3 digit buffer hit on node -1 >>> >>> >>> Thanks >>> >>> Kart >>> >>> >>> >>> >>> >> >> >> -- >> John Kanagaraj <>< >> http://www.linkedin.com/in/johnkanagaraj >> http://jkanagaraj.wordpress.com (Sorry - not an Oracle blog!) >> ** The opinions and facts contained in this message are entirely mine and >> do not reflect those of my employer or customers ** >> > > -- John Kanagaraj <>< http://www.linkedin.com/in/johnkanagaraj http://jkanagaraj.wordpress.com (Sorry - not an Oracle blog!) ** The opinions and facts contained in this message are entirely mine and do not reflect those of my employer or customers **