Correlation of Instance Statistics with DB Time for Values >= 0.5 and <= -0.5

Instance Statistic	Correlation
DML statements retried	0.951
parse count (total)	0.932
parse count (failures)	0.927
ASSM gsp:bump HWM	0.922
ASSM gsp:Search steal	0.922
ASSM gsp:Search all	0.922
enqueue waits	0.919
ASSM rsv:clear reserve	0.916
DBWR checkpoints	0.914
KTFB alloc req	0.912
bytes received via SQL*Net from client	0.901
DBWR object drop buffers written	0.887
sql area purged	0.881
root node splits	0.880
user calls	0.878
index split cancel wait noclean	0.874
SQL*Net roundtrips to/from client	0.872
Requests to/from client	0.872
Heatmap BlkLevel Ranges Flushed	0.861
session cursor cache hits	0.856
parse count (hard)	0.848
execute count	0.846
calls to kcmgcs	0.842
ASSM rsv:fill reserve	0.841
calls to get snapshot scn: kcmgss	0.839
IMU contention	0.835
KTFB free req	0.834
exchange deadlocks	0.831
write clones created in background	0.830
messages sent	0.830
messages received	0.830
KTFB commit req	0.829
CCursor + sql area evicted	0.829
TBS Extension: tasks executed	0.828
cleanouts and rollbacks - consistent read gets	0.827
Batched IO vector block count	0.822
index reclamation/extension switch	0.822
LOB table id lookup cache misses	0.814
bytes sent via SQL*Net to client	0.810
index crx upgrade (positioned)	0.798
Batched IO block miss count	0.796
Batched IO vector read count	0.793
sql area evicted	0.791
Batched IO same unit count	0.774
ASSM gsp:L2 bitmap full	0.766
table fetch by rowid	0.762
redo synch long waits	0.761
CCursor + sql area evicted - failed	0.761
buffer is pinned count	0.760
cumulative end requests	0.746
commit immediate requested	0.738
commit immediate performed	0.738
IMU undo allocation size	0.738
commit cleanout failures: cannot pin	0.729
TBS Extension: tasks created	0.725
cursor reload failures	0.722
KTFB commit time (ms)	0.721
non-idle wait count	0.713
Client Time (usec) Round Trip Time Variance	0.712
ASSM rsv:alloc from reserve succ	0.710
ASSM rsv:alloc from reserve	0.710
redo write info find	0.705
redo synch time overhead count ( 2ms)	0.702
enqueue requests	0.697
enqueue releases	0.697
opened cursors cumulative	0.689
redo synch time overhead (usec)	0.685
leaf node 90-10 splits	0.676
bytes via SQL*Net vector from client	0.674
KTFB apply req	0.670
redo synch time (usec)	0.669
redo synch time	0.669
Client Time (usec) Round Trip Time	0.657
Batched IO buffer defrag count	0.656
Batched IO slow jump count	0.646
Client Total Number of Retransmitted Packets	0.637
hot buffers moved to head of LRU	0.632
redo write size count ( 8KB)	0.624
securefile number of flushes	0.620
CR blocks created	0.614
user logouts cumulative	0.610
logons cumulative	0.608
Parallel operations not downgraded	0.603
DFO trees parallelized	0.602
physical read IO requests	0.599
recursive calls	0.599
redo synch time overhead count ( 8ms)	0.597
cumulative begin requests	0.592
IMU Redo allocation size	0.589
physical read total IO requests	0.584
active txn count during cleanout	0.583
Client Time (usec) Last Data Sent	0.580
Client Time (usec) Last Data Received	0.580
Client Time (usec) Last Ack Received	0.580
calls to kcmgas	0.579
user logons cumulative	0.576
redo write finish time	0.575
redo write time (usec)	0.574
redo write time	0.574
IMU ktichg flush	0.572
redo write size count ( 32KB)	0.567
redo blocks checksummed by FG (exclusive)	0.566
redo write total time	0.562
index split cancel op set	0.562
enqueue conversions	0.560
Batched IO (bound) vector count	0.557
Batched IO (full) vector count	0.535
redo size for direct writes	0.532
bytes via SQL*Net vector to client	0.528
redo entries for lost write detection	0.517
IMU CR rollbacks	0.510
PX local messages sent	0.509
transaction rollbacks	0.508
PX local messages recv'd	0.506
cumulative DB time in requests	0.502