Help with this performance of database
We have a web application on weblogic and backend is db 11 GR 2.We also also running batch. people complain about the tasks performed too long - hrs.
Could someone comment on this AWR?
Thank you very much
Snap Id Snap Time Sessions Curs/Sess
--------- ------------------- -------- ---------
Begin Snap: 16147 28-Feb-13 16:00:08 815 3.4
End Snap: 16148 28-Feb-13 17:00:21 871 3.6
Elapsed: 60.22 (mins)
DB Time: 148.96 (mins)
Cache Sizes Begin End
~~~~~~~~~~~ ---------- ----------
Buffer Cache: 2,208M 2,208M Std Block Size: 8K
Shared Pool Size: 3,600M 3,600M Log Buffer: 20,800K
Load Profile Per Second Per Transaction Per Exec Per Call
~~~~~~~~~~~~ --------------- --------------- ---------- ----------
DB Time(s): 2.5 0.1 0.00 0.00
DB CPU(s): 2.1 0.1 0.00 0.00
Redo size: 648,806.2 20,691.5
Logical reads: 102,169.5 3,258.4
Block changes: 5,538.9 176.6
Physical reads: 9,146.3 291.7
Physical writes: 182.8 5.8
User calls: 1,049.4 33.5
Parses: 38.5 1.2
Hard parses: 1.5 0.1
W/A MB processed: 5.4 0.2
Logons: 0.4 0.0
Executes: 785.9 25.1
Rollbacks: 12.7 0.4
Transactions: 31.4
Top 5 Timed Foreground Events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Avg
wait % DB
Event Waits Time(s) (ms) time Wait Class
------------------------------ ------------ ----------- ------ ------ ----------
DB CPU 7,403 82.8
log file sync 63,357 954 15 10.7 Commit
db file sequential read 6,961,298 599 0 6.7 User I/O
direct path read 326,419 230 1 2.6 User I/O
SQL*Net message from dblink 1,346 164 122 1.8 Network
Host CPU (CPUs: 160 Cores: 80 Sockets: 20)
~~~~~~~~ Load Average
Begin End %User %System %WIO %Idle
--------- --------- --------- --------- --------- ---------
27.61 28.95 10.5 6.0 0.0 83.6
Instance CPU
~~~~~~~~~~~~
% of total CPU for Instance: 1.5
% of busy CPU for Instance: 8.9
%DB time waiting for CPU - Resource Mgr: 0.0
Memory Statistics
~~~~~~~~~~~~~~~~~ Begin End
Host Mem (MB): 655,360.0 655,360.0
SGA use (MB): 6,144.0 6,144.0
PGA use (MB): 1,569.6 1,767.3
% Host Mem used for SGA+PGA: 1.18 1.21
Statistic Name Time (s) % of DB Time
------------------------------------------ ------------------ ------------
DB CPU 7,402.9 82.8
sql execute elapsed time 6,861.1 76.8
PL/SQL execution elapsed time 270.2 3.0
parse time elapsed 252.6 2.8
hard parse elapsed time 135.6 1.5
RMAN cpu time (backup/restore) 61.2 .7
connection management call elapsed time 20.0 .2
PL/SQL compilation elapsed time 2.5 .0
inbound PL/SQL rpc elapsed time 1.1 .0
hard parse (sharing criteria) elapsed time 0.3 .0
hard parse (bind mismatch) elapsed time 0.1 .0
repeated bind elapsed time 0.1 .0
sequence load elapsed time 0.0 .0
DB time 8,937.8
background elapsed time 3,823.8
background cpu time 1,067.8
-------------------------------------------------------------
Operating System Statistics
Statistic Value End Value
------------------------- ---------------------- ----------------
AVG_BUSY_TIME 59,237
AVG_IDLE_TIME 301,693
AVG_SYS_TIME 21,399
AVG_USER_TIME 37,656
BUSY_TIME 9,507,251
IDLE_TIME 48,300,375
SYS_TIME 3,452,080
USER_TIME 6,055,171
LOAD 28 29
OS_CPU_WAIT_TIME 524,700
RSRC_MGR_CPU_WAIT_TIME 0
VM_IN_BYTES 65,536
VM_OUT_BYTES 0
PHYSICAL_MEMORY_BYTES 687,194,767,360
NUM_CPUS 160
NUM_CPU_CORES 80
NUM_CPU_SOCKETS 20
TCP_RECEIVE_SIZE_DEFAULT 2,097,152
TCP_RECEIVE_SIZE_MAX 335,544,320
TCP_SEND_SIZE_DEFAULT 2,097,152
TCP_SEND_SIZE_MAX 335,544,320
-------------------------------------------------------------
Operating System Statistics -
Snap Time Load %busy %user %sys %idle %iowait
--------------- -------- -------- -------- -------- -------- --------
28-Feb 16:00:08 27.6 N/A N/A N/A N/A N/A
28-Feb 17:00:21 28.9 16.4 10.5 6.0 83.6 0.0
-------------------------------------------------------------
Foreground Wait Class
-> Captured Time accounts for 107.0% of Total DB time 8,937.75 (s)
-> Total FG Wait Time: 2,164.90 (s) DB CPU time: 7,402.93 (s)
Avg
%Time Total Wait wait
Wait Class Waits -outs Time (s) (ms) %DB time
-------------------- ---------------- ----- ---------------- -------- ---------
DB CPU 7,403 82.8
Commit 63,357 0 954 15 10.7
User I/O 7,528,076 0 932 0 10.4
Network 4,429,612 0 217 0 2.4
Application 1,560 0 29 18 0.3
Other 143,633 0 17 0 0.2
Concurrency 50,758 0 10 0 0.1
Configuration 71 14 4 62 0.0
System I/O 7,295 0 2 0 0.0
Administrative 2 0 0 136 0.0
-------------------------------------------------------------
Foreground Wait Events
Avg
%Time Total Wait wait Waits % DB
Event Waits -outs Time (s) (ms) /txn time
-------------------------- ------------ ----- ---------- ------- -------- ------
log file sync 63,357 0 954 15 0.6 10.7
db file sequential read 6,961,298 0 599 0 61.4 6.7
direct path read 326,419 0 230 1 2.9 2.6
SQL*Net message from dblin 1,346 0 164 122 0.0 1.8
db file parallel read 75,275 0 51 1 0.7 .6
SQL*Net more data to clien 1,468,920 0 45 0 13.0 .5
enq: KO - fast object chec 467 0 20 43 0.0 .2
direct path write 1,890 0 19 10 0.0 .2
Background Wait Events
Avg
%Time Total Wait wait Waits % bg
Event Waits -outs Time (s) (ms) /txn time
-------------------------- ------------ ----- ---------- ------- -------- ------
log file parallel write 71,426 0 393 5 0.6 10.3
db file parallel write 31,764 0 223 7 0.3 5.8
Backup: MML create a backu 4 0 163 40660 0.0 4.3
Backup: MML write backup p 14,976 0 153 10 0.1 4.0
control file parallel writ 5,276 0 81 15 0.0 2.1
Backup: MML commit backup 4 0 50 12598 0.0 1.3
log file sequential read 530 0 21 39 0.0 .5
db file async I/O submit 10,968 0 17 2 0.1 .5
db file sequential read 4,562 0 17 4 0.0 .4If you actually 160 hearts, most of the drivers is inactive (so it's not one of the dozens of databases on the same server, all the competitor for the same 160 cores), you have the Enterprise edition (which I believe is required for a parallel query, but it is also a sine qua non for the Performance and Tuning Pack (, which would be necessary for the AWR report you posted) and batch processing are parallelizable, Yes, that would certainly improve the performance of the batch. If batches are parallelizazble will depend on how they are built. If they do operations based on a game, for example, Oracle can often use a parallel query to significantly improve performance. If you have a lot of line of PL/SQL, it'll take more work to run in parallel.
Justin
Tags: Database
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