"oracle database 11g performance issues"

Question

Hai everybody,
In oracle 11g 11.2.0.1.0 we are developing business application using java, Our developers said Database performance is very poor it takes more time to retrieve values from database, they check froantend and middleware that has no problem, if the query returns less values or rows it takes little more time. How can i solve this problem? please help me
Regards Benk

Answer 1

hai,
sorry for the delay my @$ORACLE_HOME/rdbms/admin/ashrpt.sql output shown below
ASH Report For ORCL/orcl
DB Name DB Id Instance Inst Num Release RAC Host
ORCL 1295420332 orcl 1 11.2.0.1.0 NO node6.node6-
CPUs SGA Size Buffer Cache Shared Pool ASH Buffer Size
2 1,561M (100%) 480M (30.7%) 432M (27.7%) 4.0M (0.3%)
Analysis Begin Time: 04-Oct-12 16:44:16
Analysis End Time: 04-Oct-12 16:59:33
Elapsed Time: 15.3 (mins)
Begin Data Source: V$ACTIVE_SESSION_HISTORY
End Data Source: V$ACTIVE_SESSION_HISTORY
Sample Count: 3
Average Active Sessions: 0.00
Avg. Active Session per CPU: 0.00
Report Target: None specified
Top User Events DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
Avg Active
Event Event Class % Event Sessions
null event Other 33.33 0.00
Top Background Events DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
Avg Active
Event Event Class % Activity Sessions
CPU + Wait for CPU CPU 33.33 0.00
os thread startup Concurrency 33.33 0.00
Top Event P1/P2/P3 Values DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Service/Module DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
Service Module % Activity Action % Action
SYS$BACKGROUND UNNAMED 66.67 UNNAMED 66.67
SYS$USERS UNNAMED 33.33 UNNAMED 33.33
Top Client IDs DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top SQL Command Types DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Phases of Execution DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
Avg Active
Phase of Execution % Activity Sessions
SQL Execution 33.33 0.00
Top SQL with Top Events DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top SQL with Top Row Sources DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top SQL using literals DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Parsing Module/Action DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top PL/SQL Procedures DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Java Workload DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Call Types DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Sessions DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
-> '# Samples Active' shows the number of ASH samples in which the session
was found waiting for that particular event. The percentage shown
in this column is calculated with respect to wall clock time
and not total database activity.
-> 'XIDs' shows the number of distinct transaction IDs sampled in ASH
when the session was waiting for that particular event
-> For sessions running Parallel Queries, this section will NOT aggregate
the PQ slave activity into the session issuing the PQ. Refer to
the 'Top Sessions running PQs' section for such statistics.
Sid, Serial# % Activity Event % Event
User Program # Samples Active XIDs
10, 1 33.33 CPU + Wait for CPU 33.33
SYS [email protected] (ARC2) 1/917 [  0%] 0
19, 148 33.33 null event 33.33
SYS [email protected] (J000) 1/917 [  0%] 0
139, 3 33.33 os thread startup 33.33
SYS [email protected] (CJQ0) 1/917 [  0%] 0
Top Blocking Sessions DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Sessions running PQs DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top DB Objects DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top DB Files DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Top Latches DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
No data exists for this section of the report.
Activity Over Time DB/Inst: ORCL/orcl (Oct 04 16:44 to 16:59)
-> Analysis period is divided into smaller time slots
-> Top 3 events are reported in each of those slots
-> 'Slot Count' shows the number of ASH samples in that slot
-> 'Event Count' shows the number of ASH samples waiting for
that event in that slot
-> '% Event' is 'Event Count' over all ASH samples in the analysis period
Slot Event
Slot Time (Duration) Count Event Count % Event
16:48:00 (2.0 min) 1 CPU + Wait for CPU 1 33.33
16:50:00 (2.0 min) 2 null event 1 33.33
os thread startup 1 33.33
End of Report
Regards Benk