Upgrade 9.2.0.8 to 11gR2 optimizer plan stability
Hi,
We plan in upgading our Oracle 9.2.0.8 to 11g R2 soon. We are using HP-UX Itanium.
We have concern about our applications and reports performance after upgrade, and we are preparing test plan for this.
On of the plan is collecting all of the execution plans of the reports that normally running for significant time.
I need your opinion about optimizer plan stability.
As I know, that the only way in 9i is by creating stored outline since STS is not available yet.
Is this the only way or any other way that I am not aware about?
please advice and share your experience.
thanks
One option is to do the upgrade, set optimizer_features_enable to 9.2.0 and baseline capture on, run a full test workload and capture what should be a 9i like sql plan baseline. Then you turn off the sql plan capture and reset optimizer_features_enable to the full power of 11.2. These can then easily be moved between environments.
You could choose to go live with optimizer_features_enable set to 9.2. and turn off a bit later - all depends on timelines, deadlines, risk, etc.
There's a good paper out there somewhere.... here it is:
http://www.oracle.com/technetwork/database/features/manageability/9i-to-11g-real-world-customer-exper-133754.pdf
See also:
http://optimizermagic.blogspot.com/2009/11/what-should-i-do-with-old-hints-in-my.html
http://optimizermagic.blogspot.com/2009/01/plan-regressions-got-you-down-sql-plan.html
http://optimizermagic.blogspot.com/2009/01/sql-plan-management-part-2-of-4-spm.html
http://optimizermagic.blogspot.com/2009/01/sql-plan-management-part-3-of-4.html
http://optimizermagic.blogspot.com/2009/02/sql-plan-management-part-4-of-4-user.html
http://optimizermagic.blogspot.com/2009/12/ugrading-from-9i-to-11g-and-implicit.html
Edited by: DomBrooks on Nov 4, 2010 4:33 PM
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hi,
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Optimizer - Plan Change - No Stats Changed
Hello,
Last week we had a surprise when a well performing query in production started to become worse.
Query that used to run in seconds started taking 3000-4000 secs. It never completed, and the application timed out.
The stats on the table has been locked for more than 15 months now. This is a transactional table.
DB Version : 10.2.0.4
To replicate the issue, we copied over the data and stats from production to development box. We couldn't replicate it in there and hence the question.
Here is the query..
SELECT QREF
FROM WEBCFL_SPEED_PRICING SP
WHERE PAIR_ID > -1 AND
SP.REQUEST_ID IN (SELECT W.REQUEST_ID
FROM WEBCFL_SPEED_PRICING W
WHERE W.QREF IN
select 'Q14850501 N1' from dual
union all
select 'Q14850501 N3' from dual
AND PAIR_ID IN (SELECT PAIR_ID
FROM WEBCFL_SPEED_PRICING O
WHERE O.QREF IN (select 'Q14850501 N1' from dual
union all
select 'Q14850501 N2' from dual
AND SUBMIT_TO_WORKFLOW_FLAG = 'Y'
AND WORKFLOW_STATUS NOT IN ('0', '1', '2')
AND QUEUE_ID IN (SELECT QUEUE_ID
FROM WEBCFL_SPEED_PRICING O
WHERE O.QREF IN (select 'Q14850501 N1' from dual
union all
select 'Q14850501 N2' from dual
UNION
SELECT QREF
FROM WEBCFL_SPEED_PRICING SP
WHERE SP.RESILIENCY_REQUESTID IS NOT NULL
AND SP.REQUEST_ID IN (SELECT W.REQUEST_ID
FROM WEBCFL_SPEED_PRICING W
WHERE W.QREF IN (select 'Q14850501 N1' from dual
union all
select 'Q14850501 N2' from dual
AND SP.RESILIENCY_REQUESTID IN (SELECT RESILIENCY_REQUESTID
FROM WEBCFL_SPEED_PRICING O
WHERE O.QREF IN (select 'Q14850501 N1' from dual
union all
select 'Q14850501 N2' from dual
AND SP.PAIR_ID IN (SELECT PAIR_ID
FROM WEBCFL_SPEED_PRICING O
WHERE O.QREF IN (select 'Q14850501 N1' from dual
union all
select 'Q14850501 N2' from dual
AND QUEUE_ID IN (SELECT QUEUE_ID
FROM WEBCFL_SPEED_PRICING O
WHERE O.QREF IN (select 'Q14850501 N1' from dual
union all
select 'Q14850501 N2' from dual
)Plan in production
| Id | Operation | Name | Rows | Bytes | Cost |
| 0 | SELECT STATEMENT | | 2 | 279 | 22430 |
| 1 | SORT UNIQUE | | 2 | 279 | 22430 |
| 2 | UNION-ALL | | | | |
| 3 | NESTED LOOPS | | 1 | 126 | 11205 |
| 4 | MERGE JOIN CARTESIAN | | 1 | 104 | 11203 |
| 5 | HASH JOIN | | 1 | 90 | 11199 |
| 6 | VIEW | VW_NSO_3 | 2 | 28 | 4 |
| 7 | UNION-ALL | | | | |
| 8 | FAST DUAL | | 1 | | 2 |
| 9 | FAST DUAL | | 1 | | 2 |
| 10 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1252K| 19M| 11111 |
| 11 | NESTED LOOPS | | 26883 | 1995K| 11195 |
| 12 | NESTED LOOPS | | 1 | 60 | 84 |
| 13 | NESTED LOOPS | | 1 | 29 | 8 |
| 14 | VIEW | VW_NSO_2 | 2 | 28 | 4 |
| 15 | UNION-ALL | | | | |
| 16 | FAST DUAL | | 1 | | 2 |
| 17 | FAST DUAL | | 1 | | 2 |
| 18 | INDEX RANGE SCAN | IDR_PRICING_QREF_PAIR | 1 | 15 | 2 |
| 19 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1 | 31 | 76 |
| 20 | INDEX RANGE SCAN | IDX$$_7F2B0001 | 124 | | 1 |
| 21 | INDEX RANGE SCAN | NUNQ_WEBCFL_S_PRICING_2 | 57761 | | 193 |
| 22 | BUFFER SORT | | 2 | 28 | 11203 |
| 23 | VIEW | VW_NSO_1 | 2 | 28 | 4 |
| 24 | UNION-ALL | | | | |
| 25 | FAST DUAL | | 1 | | 2 |
| 26 | FAST DUAL | | 1 | | 2 |
| 27 | INDEX RANGE SCAN | IDR_PRICING_REQ_QREF | 1 | 22 | 2 |
| 28 | NESTED LOOPS | | 1 | 153 | 11223 |
| 29 | MERGE JOIN CARTESIAN | | 1 | 131 | 11221 |
| 30 | HASH JOIN | | 1 | 117 | 11217 |
| 31 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1252K| 19M| 11111 |
| 32 | NESTED LOOPS | | 21 | 2163 | 11212 |
| 33 | HASH JOIN | | 1 | 87 | 102 |
| 34 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1027 | 15405 | 76 |
| 35 | NESTED LOOPS | | 18 | 1314 | 97 |
| 36 | NESTED LOOPS | | 1 | 58 | 21 |
| 37 | NESTED LOOPS | | 1 | 29 | 8 |
| 38 | VIEW | VW_NSO_5 | 2 | 28 | 4 |
| 39 | UNION-ALL | | | | |
| 40 | FAST DUAL | | 1 | | 2 |
| 41 | FAST DUAL | | 1 | | 2 |
| 42 | INDEX RANGE SCAN | IDR_PRICING_QREF_RES | 1 | 15 | 2 |
| 43 | TABLE ACCESS BY INDEX ROWID| WEBCFL_SPEED_PRICING | 1 | 29 | 13 |
| 44 | INDEX RANGE SCAN | IDX$$_7F3A0001 | 25 | | 2 |
| 45 | INDEX RANGE SCAN | IDX$$_7F2B0001 | 124 | | 1 |
| 46 | VIEW | VW_NSO_6 | 2 | 28 | 4 |
| 47 | UNION-ALL | | | | |
| 48 | FAST DUAL | | 1 | | 2 |
| 49 | FAST DUAL | | 1 | | 2 |
| 50 | INDEX RANGE SCAN | NUNQ_WEBCFL_S_PRICING_2 | 57761 | | 193 |
| 51 | VIEW | VW_NSO_7 | 2 | 28 | 4 |
| 52 | UNION-ALL | | | | |
| 53 | FAST DUAL | | 1 | | 2 |
| 54 | FAST DUAL | | 1 | | 2 |
| 55 | BUFFER SORT | | 2 | 28 | 11221 |
| 56 | VIEW | VW_NSO_4 | 2 | 28 | 4 |
| 57 | UNION-ALL | | | | |
| 58 | FAST DUAL | | 1 | | 2 |
| 59 | FAST DUAL | | 1 | | 2 |
| 60 | INDEX RANGE SCAN | IDR_PRICING_REQ_QREF | 1 | 22 | 2 |
-------------------------------------------------------------------------------------------------- Plan in Dev
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 2 | 279 | 22533 (51)| 00:04:31 |
| 1 | SORT UNIQUE | | 2 | 279 | 22533 (51)| 00:04:31 |
| 2 | UNION-ALL | | | | | |
|* 3 | HASH JOIN | | 1 | 126 | 11257 (1)| 00:02:16 |
| 4 | VIEW | VW_NSO_3 | 2 | 28 | 4 (0)| 00:00:01 |
| 5 | UNION-ALL | | | | | |
| 6 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 7 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 8 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1252K| 19M| 11162 (1)| 00:02:14 |
| 9 | NESTED LOOPS | | 125 | 14000 | 11252 (1)| 00:02:16 |
|* 10 | HASH JOIN | | 1 | 96 | 91 (2)| 00:00:02 |
| 11 | VIEW | VW_NSO_1 | 2 | 28 | 4 (0)| 00:00:01 |
| 12 | UNION-ALL | | | | | |
| 13 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 14 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 15 | NESTED LOOPS | | 108 | 8856 | 86 (0)| 00:00:02 |
| 16 | NESTED LOOPS | | 1 | 60 | 84 (0)| 00:00:02 |
| 17 | NESTED LOOPS | | 1 | 29 | 8 (0)| 00:00:01 |
| 18 | VIEW | VW_NSO_2 | 2 | 28 | 4 (0)| 00:00:01 |
| 19 | UNION-ALL | | | | | |
| 20 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 21 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
|* 22 | INDEX RANGE SCAN | IDR_PRICING_QREF_PAIR | 1 | 15 | 2 (0)| 00:00:01 |
|* 23 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1 | 31 | 76 (0)| 00:00:01 |
|* 24 | INDEX RANGE SCAN | IDX$$_7F2B0001 | 124 | | 1 (0)| 00:00:01 |
|* 25 | INDEX RANGE SCAN | IDR_PRICING_REQ_QREF | 5038 | 108K| 2 (0)| 00:00:01 |
|* 26 | INDEX RANGE SCAN | NUNQ_WEBCFL_S_PRICING_2 | 57761 | | 198 (4)| 00:00:03 |
| 27 | NESTED LOOPS | | 1 | 153 | 11274 (1)| 00:02:16 |
| 28 | MERGE JOIN CARTESIAN | | 1 | 131 | 11272 (1)| 00:02:16 |
|* 29 | HASH JOIN | | 1 | 117 | 11268 (1)| 00:02:16 |
| 30 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1252K| 19M| 11162 (1)| 00:02:14 |
| 31 | NESTED LOOPS | | 21 | 2163 | 11263 (1)| 00:02:16 |
|* 32 | HASH JOIN | | 1 | 87 | 102 (1)| 00:00:02 |
| 33 | TABLE ACCESS BY INDEX ROWID | WEBCFL_SPEED_PRICING | 1027 | 15405 | 76 (0)| 00:00:01 |
| 34 | NESTED LOOPS | | 18 | 1314 | 97 (0)| 00:00:02 |
| 35 | NESTED LOOPS | | 1 | 58 | 21 (0)| 00:00:01 |
| 36 | NESTED LOOPS | | 1 | 29 | 8 (0)| 00:00:01 |
| 37 | VIEW | VW_NSO_5 | 2 | 28 | 4 (0)| 00:00:01 |
| 38 | UNION-ALL | | | | | |
| 39 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 40 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
|* 41 | INDEX RANGE SCAN | IDR_PRICING_QREF_RES | 1 | 15 | 2 (0)| 00:00:01 |
|* 42 | TABLE ACCESS BY INDEX ROWID| WEBCFL_SPEED_PRICING | 1 | 29 | 13 (0)| 00:00:01 |
|* 43 | INDEX RANGE SCAN | IDX$$_7F3A0001 | 25 | | 2 (0)| 00:00:01 |
|* 44 | INDEX RANGE SCAN | IDX$$_7F2B0001 | 124 | | 1 (0)| 00:00:01 |
| 45 | VIEW | VW_NSO_6 | 2 | 28 | 4 (0)| 00:00:01 |
| 46 | UNION-ALL | | | | | |
| 47 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 48 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
|* 49 | INDEX RANGE SCAN | NUNQ_WEBCFL_S_PRICING_2 | 57761 | | 198 (4)| 00:00:03 |
| 50 | VIEW | VW_NSO_7 | 2 | 28 | 4 (0)| 00:00:01 |
| 51 | UNION-ALL | | | | | |
| 52 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 53 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 54 | BUFFER SORT | | 2 | 28 | 11272 (1)| 00:02:16 |
| 55 | VIEW | VW_NSO_4 | 2 | 28 | 4 (0)| 00:00:01 |
| 56 | UNION-ALL | | | | | |
| 57 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
| 58 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
|* 59 | INDEX RANGE SCAN | IDR_PRICING_REQ_QREF | 1 | 22 | 2 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------------------------The second half of the plan is same in Prod and Dev. It is the first half of the plan that is causing the problem.
In the good plan in Dev, I don't see a MERGE CARTESIAN JOIN in the first part. But, in the plan in production, I do see this.
One bit of detail is: The stats on this table is locked for more than 15 months now. Not sure why, but someone did it to solve some issue previously.
I have compared the structure in production and dev. Stats for the table is same in production and dev.
I haven't checked the optimizer env parameters and the system stats between the systems.
Still waiting for the information.
Any pointers ?
Rgds,
Gokul
Edited by: Gokul Gopal on Dec 10, 2012 6:24 PMHi,
1) the stats didn't change, but the query probably changes all the time (that's the whole point of using dynamic SQL). The costs of the two plans are similar, so it wouldn't be surprising at all if a slight change in the query would result in a significant change in the plan
2) it's hard to compare entire plans, but one of noticeable differences is the fact that one query uses 1 cartesian merge join, while the other is using 2. You can try disabling cartesian merge joins with a hint or on the session level
3) it's more difficult for the optimizer to estimate cardinality of
select * from tab where col in ('value1', 'value2', ...)than
select * from tabl where col in
(select 'value1' from dual
union all
select 'value2' from dual
union all
);so if possible, you should consider rewriting this query in a way that is less confusing to the optimizer
4) I would be worried about not being able to replicate the issue on a test box -- it means that you can't use your test box to test production performance issues. The difference in behavior suggests that there must be some difference in optimizer settings or table stats (or both). Did you try importing the stats from prod? You can also try dumping parameters to text files and running text comparison to isolate parameters that differ
5) in a comment to your original post you mention that the issue was resolved -- but it doesn't sound like a sustainable solution, rather, looks like a temporary workaround
Best regards,
Nikolay -
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Jesslynn wrote:
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I want to upgrade to a smartphone on a small business plan. How much more will it be?
I want to know how much more it will be to upgrade from a basic phone with no data to a smartphone such as an iPhone with 1 or 2 GB of data a month. I'm currently on a plan with my business so I want to know how much a month this will change the overall bill. I want to know before approaching one of the managers about upgrading. I feel its a bad idea not to know exactly how much more it will be and if it will be affordable for me. Thanks!
@kwkinneer
Upgrading from a basic phone to a smartphone will be a fun experience! I am happy to go over plan options with you! If you plan to stay with the current plan on your business account, you add a standalone data feature starting at $30 for 2GB. Otherwise you can switch your line to one of our new Share Everything plans. This plan gives you unlimited voice, text and you choose a shared data plan. With this plan you also get the Mobile Hotspot feature at no additional charge. See plan options here: http://bit.ly/T8w8iL.
AnthonyTa_VZW
VZW Support
Follow us on Twitter @VZWSupport -
Upgrading part way through the term of a plan
I'm looking to sign up for the 'Photoshop Photography Program' plan as well as a Single App plan for Illustrator. If my needs require that I need another app partway through the first year can I upgrade to the full plan without any penalty. Or do I have to either wait until 12 months are up or cancel (and loose) what I've already paid for and start again part way through?
I'm torn between getting Creative Suite CS6 Design Standard as well as Lightroom separately on a one off, or signing up for CC, which I accept is more flexible but in the long term will cost considerably more. These are not every day tools for me but they are essential all the same, a major investment which ever way you cut it.
Thanks in advance for your response, Chas RFNM.Hi RFNM,
Yes, you can upgrade to CC full plan anytime and to waive off the penalty please contact customer support:
http://www.adobe.com/support/download-install/supportinfo/
You can refer the below mentioned link also to manage subscription:
http://helpx.adobe.com/x-productkb/policy-pricing/membership-subscription-troubleshooting- creative-cloud.html
Let us know if you require any further information,
Thanks!
Gurleen -
I've been a loyal customer to Verizon. I am still contemplating switching to a bill instead of prepaid but in the mean time I was wondering if Verizon had a way for prepaid customers to get upgrades.
That makes no sense. People get subsidized upgrades because they are agreeing to a 2 year contract. You don't have contract with pre-paid so no you can't get a discounted phone for pre-paid. And if you go on postpaid you might want to re-think about taking that subsidized upgrade because you must realize you are locked into a 2 year contract and you won't get to upgrade before then. Unless you need more than 6.5 GB of data I'm not sure why you would switch from pre-paid.
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Can you upgrade to an iPhone 4 without a data plan?
I was trying to switch my non-smartphone to an iphone. Online it said i had to change to a data plan, but I don't want to pay an extra 10 bucks a month. I have heard this is possible so I would like to see how I can do it. Thanks!
If you activate a smartphone on Verizon's network you are required to have a data plan.
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