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performance issues
Message |
Score |
Author |
Date |
Hi Team,
We are experiencing performance issues...... |
|
Phuti Tsongayinwe |
Jul 07, 2022, 12:34 |
Below is the Time Model Statistics
<pre>
Time ...... |
|
Phuti Tsongayinwe |
Jul 07, 2022, 13:21 |
>>> <i> We are experiencing performance issues o...... |
     |
Michel Cadot |
Jul 07, 2022, 15:29 |
Thanks Michel,
My users are reporting poor perf...... |
|
Phuti Tsongayinwe |
Jul 07, 2022, 18:28 |
Maybe the problem is in the application.
They e...... |
     |
Michel Cadot |
Jul 07, 2022, 20:30 |
And about 2200 SQL statements per transaction.
...... |
     |
Michel Cadot |
Jul 07, 2022, 20:32 |
Thanks Michel,
I need to check that info with t...... |
|
Phuti Tsongayinwe |
Jul 07, 2022, 20:46 |
Hi Team,
I forgot to mention that we have 3 app...... |
|
Phuti Tsongayinwe |
Jul 08, 2022, 10:01 |
The AWR report gives you the most expensive quer...... |
     |
Michel Cadot |
Jul 08, 2022, 11:22 |
Thanks Michel... |
|
Phuti Tsongayinwe |
Jul 12, 2022, 16:20 |
Hi Team,
As an update, I logged an SR with the ...... |
     |
Phuti Tsongayinwe |
Jul 21, 2022, 13:22 |
Thanks, we'll keep following this thread.
Reg...... |
|
Michel Cadot |
Jul 21, 2022, 16:55 |
As feedback:
Oracle has identified this as a bu...... |
     |
Phuti Tsongayinwe |
Aug 16, 2022, 11:28 |
Thanks you for your feedback.
Regards
Michel...... |
     |
Michel Cadot |
Aug 16, 2022, 13:25 |
Subject: |
performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Jul 07, 2022, 12:34, 326 days ago |
Os info: |
Oracle Solaris 11.4 SPARC. |
Oracle info: |
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.13.0.0.0 |
Message: |
Hi Team,
We are experiencing performance issues on our prod DB.
Now, I pulled the AWR report to have a look.
Snap Id Snap Time Sessions Cursors/Session
Begin Snap: 22630 07-Jul-22 10:27:50 100 80.8
End Snap: 22631 07-Jul-22 11:28:07 107 72.4
Elapsed: 60.28 (mins)
DB Time: 380.96 (mins)
Load Profile
Per Second Per Transaction Per Exec Per Call
DB Time(s): 6.3 4.5 0.00 0.00
DB CPU(s): 5.9 4.2 0.00 0.00
Background CPU(s): 0.0 0.0 0.00 0.00
Redo size (bytes): 35,974.7 25,648.1
Logical read (blocks): 276,808.6 197,350.1
Block changes: 246.4 175.7
Physical read (blocks): 4,203.0 2,996.5
Physical write (blocks): 73.7 52.6
Read IO requests: 1,390.7 991.5
Write IO requests: 2.5 1.8
Read IO (MB): 32.8 23.4
Write IO (MB): 0.6 0.4
IM scan rows: 0.0 0.0
Session Logical Read IM: 0.0 0.0
User calls: 4,589.4 3,272.0
Parses (SQL): 70.2 50.1
Hard parses (SQL): 3.4 2.4
SQL Work Area (MB): 9.8 7.0
Logons: 1.7 1.2
User logons: 0.1 0.1
Executes (SQL): 3,067.6 2,187.0
Rollbacks: 0.0 0.0
Transactions: 1.4
Top 10 Foreground Events by Total Wait Time
Event Waits Total Wait Time (sec) Avg Wait % DB time Wait Class
DB CPU 21.4K 93.5
db file sequential read 4,582,827 1302.5 284.22us 5.7 User I/O
SQL*Net more data to client 1,990,298 156.9 78.82us .7 Network
PGA memory operation 3,386,157 124.6 36.79us .5 Other
direct path read 35,914 114.7 3.19ms .5 User I/O
read by other session 375,667 80.9 215.25us .4 User I/O
db file scattered read 35,692 52 1.46ms .2 User I/O
db file parallel read 57,499 46 799.93us .2 User I/O
SQL*Net message to client 16,480,229 29.5 1.79us .1 Network
latch: shared pool 2,327 18.3 7.87ms .1 Concurrency
Please help...
I would appreciate if someone can also assist.
Thanks in advance...
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Subject: |
Re: performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Jul 07, 2022, 13:21, 326 days ago |
Message: |
Below is the Time Model Statistics
Time Model Statistics
Statistic Name Time (s) % of DB Time % of Total CPU Time
DB CPU 21,374.63 93.51 100.08
sql execute elapsed time 20,614.32 90.19
parse time elapsed 1,261.07 5.52
hard parse elapsed time 493.44 2.16
hard parse (sharing criteria) elapsed time 193.49 0.85
connection management call elapsed time 129.21 0.57
PL/SQL execution elapsed time 12.88 0.06
repeated bind elapsed time 3.86 0.02
PL/SQL compilation elapsed time 0.29 0.00
DB time 22,857.36
total CPU time 21,357.96
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Subject: |
Re: performance issues |
Author: |
Michel Cadot, France |
Date: |
Jul 07, 2022, 15:29, 326 days ago |
Score: |
       |
Message: |
>>> We are experiencing performance issues on our prod DB
What performances problem?
From your AWR abstract your Db runs smoothly.
Regards
Michel
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Subject: |
Re: performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Jul 07, 2022, 18:28, 326 days ago |
Message: |
Thanks Michel,
My users are reporting poor performance on the application.
So, I thought let me start with the DB.
Thank you so much for the reply.
Much appreciated !!!
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Subject: |
Re: performance issues |
Author: |
Michel Cadot, France |
Date: |
Jul 07, 2022, 20:30, 326 days ago |
Score: |
       |
Message: |
Maybe the problem is in the application.
They execute 3,000 SQL statements per second, is this expected?
Regards
Michel
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Subject: |
Re: performance issues |
Author: |
Michel Cadot, France |
Date: |
Jul 07, 2022, 20:32, 326 days ago |
Score: |
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Message: |
And about 2200 SQL statements per transaction.
Regards
Michel
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Subject: |
Re: performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Jul 07, 2022, 20:46, 326 days ago |
Message: |
Thanks Michel,
I need to check that info with the application team.
Thanks for the analysis.
I would update the thread.
Thanks
Phuti |
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Subject: |
Re: performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Jul 08, 2022, 10:01, 325 days ago |
Message: |
Hi Team,
I forgot to mention that we have 3 applications that are being managed through schemas on that database but these applications are interrelated.
So I am not sure if the SQL statements are from one schema or its a combinations of all the schemas.
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Subject: |
Re: performance issues |
Author: |
Michel Cadot, France |
Date: |
Jul 08, 2022, 11:22, 325 days ago |
Score: |
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Message: |
The AWR report gives you the most expensive queries depending on different resources (CPU, elapsed, IO, nb of executions...).
Regards
Michel
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Subject: |
Re: performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Jul 12, 2022, 16:20, 321 days ago |
Message: |
Thanks Michel |
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Subject: |
Re: performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Jul 21, 2022, 13:22, 312 days ago |
Score: |
       |
Message: |
Hi Team,
As an update, I logged an SR with the Oracle Product Team, as such they are busy reviewing the issue.
I will share the outcome as soon we have found the issue.
Thanks
P |
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Subject: |
Re: performance issues |
Author: |
Michel Cadot, France |
Date: |
Jul 21, 2022, 16:55, 312 days ago |
Message: |
Thanks, we'll keep following this thread.
Regards
Michel
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Subject: |
Re: performance issues |
Author: |
Phuti Tsongayinwe, South Africa |
Date: |
Aug 16, 2022, 11:28, 286 days ago |
Score: |
       |
Message: |
As feedback:
Oracle has identified this as a bug in the ADF code as such they have recommended that we apply the ADF Bundle Patch 33697227 to remediate this.
Thanks
P |
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Subject: |
Re: performance issues |
Author: |
Michel Cadot, France |
Date: |
Aug 16, 2022, 13:25, 286 days ago |
Score: |
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Message: |
Thanks you for your feedback.
Regards
Michel
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