Bad performance after analyze index

Hi,
I have a range partitioned table which recently I had to added new partitions to. After adding new partitions a particular query I had running on it started doing full table scans instead of using the index.
I read somewhere that you have to disable the primary key prior to adding new partitions and renable after completion. This I did and true, the query was using the index again. However as soon as I analyze the index, the full table scan is back.
I even tried to analyze the table using:
begin
dbms_stats.gather_table_stats
(user,'tablename',
method_opt => 'for all indexes for all indexed columns size auto',
cascade => true);
end;
Still the query doesn't improve.
I am using 9.0.1.3 on Solaris.
Any ideas on this as I'm stuck at the moment.
Thanks!

Hello,
Please check <Bug:3048661>
Hdr: 3048661 9.2.0.3.0 RDBMS 9.2.0.3.0 RAM INDEX PRODID-5 PORTID-23
Abstract: CREATE BITMAP INDEXES TAKES LONGER IN 9203 WHEN PGA => 2GB
Thanks
Ashish

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Rebuild index vs Analyze index

Hi All,
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CKPT wrote:
You can see the posts of experts by jonathan
I am realy confused about rebuilding index versus Analyzing index. tell us you are getting confused why we need to ananlyze before reubild index? if so
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Hello,
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on the specific master data zcustomer.
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Vikrant,
You should wait for some time buddy, its weekend ;-) .
this is not some kind of question, but a discussion. some statements come from our client that after weekly reboot of system, the oracle database performance is low for some time and increase after some time(say 2 days).i think it is but obvious, because at reboot oracle flushes all cache, and temporary space, so it need to re parse the sql statements and perform some disc I/O's so it might need some time and hence performance will degrade.
>
I would start from saying that checking the performance when the system just started, is a wrong approach. There would be lots of IOs , parsing, calculations(related to memory allocations) happening so there would be a delay/bad performance at that time. Very simple example can be parsing, another can be memory allocation. Oracle doesn't allocate the entire memory in the instance startup that is allocated to the memory areas but allocates just the bare minimum that is needed to start the instance and than after the startup, it keeps on allocating the memory. So surely enough, with the startup and after a while of it, there would be a different performance than that after the instance hsa already been started and the workload informations have started coming up.
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>
but at the same time some people claim that after reboot their database performance is better than their normal performance for some days. it seems controversial that's why i am posting it here.
what might be the reason behind this?? prior can have a valid reason of hard parsing, but what with second case??
>
This should not come as a surprise once we understand what might be happening with this process. Assume a situation where you have undersized caches. For example, shared pool . which is very heavily used for database , if this is going to be undersized and you are not using automatic memory management, you won't be enjoying the dynamic management of this parameter. Now, if you do lots of parsing , thanks to your wrongly written queries, you would eventually end up filling up shared pool to its max thus leaving no space for incoming new hard parsed cursors. Here , if you can't manage to add more memory to add to it, the only solution left would be to flush the shared pool( as good as rebooting the db because this would do the same) and than make space for the new cursors. The performance is going to be better becausethe cursors would not be getting flushed out immediately and will be kept in the shared pool as long as its not filled up again.Once you have reached to limit of it, again there would be performance benefit. So there are always odds added to the statements like this that I rebuilt my index , I got better, I rebooted my server, my querie are much faster now. Most of the time when these kind of statements are given, they are based on what we have seen, without understading what actually might have happened. So I would siggest to hear the statement but not take them as a rule of thumb to follow.
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I check these notes, unfortunately it is different our situation.
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I list there for your reference.
4.6C
AQA0FI==========S2============
Open Cursor ANLP                                    38,702 39,329,356 = 39,329,356      34.6     AQA0FI==========S2============   DB     Opens
Fetch ANLP                                         292,177 30,378,351 = 30,378,351      26.7    26.7 AQA0FI==========S2============   DB     OpenS
Select Single ANLC                                  15,012 19,965,172 = 19,965,172      17.5    17.5 AQA0FI==========S2============   DB     OpenS
Select Single ANLA                                  13,721 11,754,305 = 11,754,305      10.3    10.3 AQA0FI==========S2============   DB     OpenS
Select Single ANLZ                                   3,753   3,259,308 = 3,259,308       2.9     2.9 AQA0FI==========S2============   DB     OpenS
Select Single ANLB                                   3,753   3,069,119 = 3,069,119       2.7     2.7 AQA0FI==========S2============   DB     OpenS
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Call Func. RSAQ_SUBMIT_QUERY_REPORT     1     358,569,656          88
Program AQIWFI==========S2============     2     358,558,488          1,350
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After testing final cut (which I love) and Premiere back and forth with the exact same media I notice that editing prores in Final cut is the best when it comes to just edit the film. Sure Premiere does take native MTS files but what good is this when it doesn't run fluidly? Comparing playback and editing with prores in Final Cut and Premiere makes me realize that on my computer, don't ask me why, a rendered sequence with prores material in Premiere is far more jerky than a sequence with prores that "do not need render" in Final cut. Shouldn't they be the same?? Movements like camera pans that originally were shot really smoothly isn't as smooth as they should be playing back in premiere (and yes I know I got the right sequence settings and all). Final cut however gives me what I want.
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12 dec 2011 kl. 22:03 skrev lasvideo:
Re: bad performance quadro 4800 and premiere pro
created by lasvideo in Premiere Pro CS5 & CS5.5 - View the full discussion
Some answers for you right from the horses mouth
http://blogs.adobe.com/premiereprotraining/2011/02/cuda-mercury-playba ck-engine-and-adobe-premiere-pro.html
http://forums.adobe.com/message/3804386#3804386
http://forums.adobe.com/community/premiere/faq_list
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Bad performance after analyze index

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